1
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Fathy AM, Hessien MM, Ibrahim MM, Ramadan AEMM. Anionic ligands tune the structural and catalytic properties of quinoxaline-based copper(II) complexes as mimetics of copper-containing oxidase protein. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131809] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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2
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Ibrahim MM, Fathy AM, Al‐Harbi SA, Ramadan AEM. Triazole based copper(
II
) complexes: Synthesis, spectroscopic characterization, Density Function Theory study, and biomimicking of copper containing oxidase proteins. J CHIN CHEM SOC-TAIP 2021. [DOI: 10.1002/jccs.202100048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mohamed M. Ibrahim
- Chemistry Department, College of Science Taif University Taif Saudi Arabia
| | - Ahmad M. Fathy
- Chemistry Department, Faculty of Science Zagazig University Zagazig Egypt
| | - Sami A. Al‐Harbi
- Chemistry Department, University College in Al‐Jamoum Umm Al‐Qura University Makkah Saudi Arabia
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3
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Louis L, Alexander V, Kumar DS, Senthan SA, Viveke AA. Photoluminescence and electrochemical studies of tetranuclear ruthenium(II) polypyridyl complexes of benzimidazolyl functionalised pyrenylcalix[4]resorcinarene. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.10.043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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4
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Mukherjee N, Podder S, Mitra K, Majumdar S, Nandi D, Chakravarty AR. Targeted photodynamic therapy in visible light using BODIPY-appended copper(ii) complexes of a vitamin B6Schiff base. Dalton Trans 2018; 47:823-835. [DOI: 10.1039/c7dt03976j] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BODIPY-appended copper(ii) complexes of vitamin B6derivatives localize in mitochondria and exhibit cancer cell selective photocytotoxicity by1O2mediated apoptosis.
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Affiliation(s)
- Nandini Mukherjee
- Department of Inorganic and Physical Chemistry
- Indian Institute of Science
- Bangalore 560012
- India
| | - Santosh Podder
- Department of Biochemistry
- Indian Institute of Science
- Bangalore 560 012
- India
| | - Koushambi Mitra
- Department of Inorganic and Physical Chemistry
- Indian Institute of Science
- Bangalore 560012
- India
| | - Shamik Majumdar
- Department of Biochemistry
- Indian Institute of Science
- Bangalore 560 012
- India
| | - Dipankar Nandi
- Department of Biochemistry
- Indian Institute of Science
- Bangalore 560 012
- India
| | - Akhil R. Chakravarty
- Department of Inorganic and Physical Chemistry
- Indian Institute of Science
- Bangalore 560012
- India
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Anĝay F, Celik O, Barlık O, Ulusoy M. 1-(2,3,4,5,6-Penta-methyl-benz-yl)-2-(pyridin-2-yl)-1H-benzimidazole. Acta Crystallogr Sect E Struct Rep Online 2014; 70:o563-4. [PMID: 24860369 PMCID: PMC4011285 DOI: 10.1107/s1600536814007934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Accepted: 04/09/2014] [Indexed: 11/21/2022]
Abstract
In the title compound, C24H25N3, the benzimidazole ring system is essentially planar, with an r.m.s. deviation of 0.017 Å, and forms dihedral angles of 7.81 (5) and 87.61 (4)° with the pyridine and benzene rings, respectively. An intramolecular C—H⋯N hydrogen bond is observed. In the crystal, molecules are stacked along the a axis by weak C—H⋯π interactions.
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Affiliation(s)
- Fırat Anĝay
- Department of Physics, Institute of Sciences, Dicle University, 21280, Diyarbakır, Turkey
| | - Omer Celik
- Department of Physics, Faculty of Education, Dicle University, 21280, Diyarbakır, Turkey ; Science and Technology Application and Research Center, Dicle University, 21280, Diyarbakır, Turkey
| | - Orhan Barlık
- Department of Chemistry, Faculty of Science & Art, Harran University, 63300, Şanlıurfa, Turkey
| | - Mahmut Ulusoy
- Department of Chemistry, Faculty of Science & Art, Harran University, 63300, Şanlıurfa, Turkey
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6
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Celik O, Anĝay F, Gündoĝan M, Ulusoy M. 1-(4-Fluoro-benz-yl)-2-(pyridin-2-yl)-1H-benzimidazole. Acta Crystallogr Sect E Struct Rep Online 2014; 70:o485. [PMID: 24826178 PMCID: PMC3998549 DOI: 10.1107/s1600536814005947] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Accepted: 03/17/2014] [Indexed: 11/10/2022]
Abstract
In the title compound, C19H14FN3, the dihedral angles between the benzimidazole unit (r.m.s. deviation= 0.017 Å) and the pyridine and benzene rings are 24.46 (4) and 81.87 (3)°, respectively. In the crystal, mol-ecules are stacked along the a-axis direction by C-H⋯π inter-actions.
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Affiliation(s)
- Omer Celik
- Department of Physics, Faculty of Education, Dicle University, 21280, Diyarbakır, Turkey
| | - Fırat Anĝay
- Department of Physics, Institute of Sciences, Dicle University, 21280, Diyarbakır, Turkey
| | - Mustafa Gündoĝan
- Department of Chemistry, Faculty of Science & Art, Harran University, 63300, Şanlıurfa, Turkey
| | - Mahmut Ulusoy
- Department of Chemistry, Faculty of Science & Art, Harran University, 63300, Şanlıurfa, Turkey
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7
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Ramadan RM, Shohayeb SM, Mohamed RG. Synthesis and Characterization of Some New Binary and Ternary Copper Complexes: X-Ray Crystal Structural of Dioxo Dinuclear Bipyridine Copper Complex. ACTA ACUST UNITED AC 2013. [DOI: 10.1080/15533174.2012.752390] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Ramadan M. Ramadan
- a Chemistry Department, Faculty of Science , Ain Shams University , Cairo , Egypt
| | - Shahera M. Shohayeb
- b Department of Mathematics and Engineering physics, Faculty of Engineering , Shoubra , Banha University , Egypt
| | - Rania G. Mohamed
- c Chemistry Department, Faculty of Science , El-Fayoum University , El-Fayoum , Egypt
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8
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Şırecı N, Yilmaz Ü, Küçükbay H, Akkurt M, Baktir Z, Türktekın S, Büyükgüngör O. Synthesis of 1-substituted benzimidazole metal complexes and structural characterization of dichlorobis(1-phenyl-1 H -benzimidazole- κN 3)cobalt(II) and dichlorobis (1-phenyl-1 H -benzimidazole- κN 3)zinc(II). J COORD CHEM 2011. [DOI: 10.1080/00958972.2011.584620] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Nıhat Şırecı
- a Faculty of Education , Adıyaman University , 02040 Adıyaman , Turkey
| | - Ülkü Yilmaz
- b Department of Chemistry, Faculty of Arts and Sciences , ınönü University , 44280 Malatya , Turkey
| | - Hasan Küçükbay
- a Faculty of Education , Adıyaman University , 02040 Adıyaman , Turkey
- b Department of Chemistry, Faculty of Arts and Sciences , ınönü University , 44280 Malatya , Turkey
| | - Mehmet Akkurt
- c Department of Physics, Faculty of Arts and Sciences , Erciyes University , 38039 Kayseri , Turkey
| | - Zelıha Baktir
- c Department of Physics, Faculty of Arts and Sciences , Erciyes University , 38039 Kayseri , Turkey
| | - Sevım Türktekın
- c Department of Physics, Faculty of Arts and Sciences , Erciyes University , 38039 Kayseri , Turkey
| | - Orhan Büyükgüngör
- d Department of Physics, Faculty of Arts and Sciences , Ondokuz Mayis University , 55139 Samsun , Turkey
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9
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Ali S, Soliman A, Aboaly M, Ramadan R. Chromium, Molybdenum and Ruthenium Complexes of 2-Hydroxyacetophenone Schiff Bases. J COORD CHEM 2010. [DOI: 10.1080/0095897021000023509] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- S.A. Ali
- a Chemistry Department, University College for Girls , Ain Shams University , Cairo, Egypt
| | - A.A. Soliman
- b Chemistry Department, Faculty of Science , Cairo University , Giza, Egypt
| | - M.M. Aboaly
- c Chemistry Department, Faculty of Science , Ain Shams University , Cairo, Egypt
| | - R.M. Ramadan
- c Chemistry Department, Faculty of Science , Ain Shams University , Cairo, Egypt
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10
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Şırecı N, Küçükbay H, Akkurt M, Pinar Yalçin Ş, Nawaz Tahır M, Ott H. Preparation and characterization of trimethylsilyl-substituted benzimidazole metal complexes and structural characterization of dichlorobis[1-(trimethylsilyl)methyl-1H-benzimidazole-κ N 3]cobalt(II). J COORD CHEM 2010. [DOI: 10.1080/00958972.2010.509432] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Nıhat Şırecı
- a Department of Chemistry, Faculty of Arts and Sciences , Adıyaman University , 02040 Adıyaman, Turkey
| | - Hasan Küçükbay
- b Department of Chemistry, Faculty of Arts and Sciences , İnönü University , 44280 Malatya, Turkey
| | - Mehmet Akkurt
- c Department of Physics, Faculty of Arts and Sciences , Erciyes University , 38039 Kayseri, Turkey
| | - Şerıfe Pinar Yalçin
- d Department of Physics, Faculty of Arts and Sciences , Harran University , 63300 Şanliurfa, Turkey
| | - M. Nawaz Tahır
- e Department of Physics , University of Sargodha , Sargodha, Pakistan
| | - Holger Ott
- f Bruker AXS GmbH, Oestliche Rheinbrueckenstrasse 49 , 76187 Karlsruhe, Germany
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11
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Quezada-Buendía X, Esparza-Ruiz A, Peña-Hueso A, Barba-Behrens N, Contreras R, Flores-Parra A, Bernès S, Castillo-Blum SE. Synthesis and structural analyses of Co(III) coordination compounds of 2-(2′-pyridyl)benzimidazole and 2-(2-hydroxyphenyl)-1H-benzimidazole. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2008.01.048] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Ali OAM, Abdel-Rahman LH, Ramadan RM. Ruthenium carbonyl derivatives of N-salicylidene-2-hydroxyaniline. J COORD CHEM 2007. [DOI: 10.1080/00958970701263952] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Omyma A. M. Ali
- a Chemistry Department , University College for Girls, Ain Shams University , Cairo, Egypt
| | - Laila H. Abdel-Rahman
- b Faculty of Science, Department of Chemistry , Sohag South Valley University , Sohag, Egypt
| | - Ramadan M. Ramadan
- c Faculty of Science, Chemistry Department , Ain Shams University , Cairo, Egypt
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Soliman AA. Spectral and thermal studies on ruthenium carbonyl complexes with 5-trifluoromethyl-2,4-dihydropyrazol-3-one ligands. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2007; 67:852-7. [PMID: 17045838 DOI: 10.1016/j.saa.2006.08.043] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2006] [Revised: 08/24/2006] [Accepted: 08/29/2006] [Indexed: 05/12/2023]
Abstract
Reactions of the cluster compound [Ru(3)(CO)(12)] with 5-trifluoromethyl-2,4-dihydropyrazol-3-one (HL(1)), 4-(2,4-dichlorophenylhydrazono)-5-trifluoromethyl-2,4-dihydropyrazol-3-one (H(2)L(2)), 4-(3-fluorophenylhydrazono)-5-trifluoromethyl-2,4-dihydropyrazol-3-one (H(2)L(3)), 4-(3-trifuoloromethyl-phenylhydrazono)-5-trifluoromethyl-2,4-dihydropyrazol-3-one (H(2)L(4)) and 4-(3-nitrophenylhydrazono)-5-trifluoromethyl-2,4-dihydropyrazol-3-one (H(2)L(5)) have been carried out in benzene and under reduced pressure. The structures of the isolated complexes were elucidated using elemental analyses, IR, UV-vis, mass and NMR spectroscopy. All the complexes are diamagnetic and have trigonal bipyramidal structures with general formulae [Ru(CO)(4)(HL(1))] and [Ru(CO)(3)(H(2)L(2-5))]. The thermal decompositions of the complexes were studied in correlation with the mass spectral fragmentation patterns.
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Affiliation(s)
- Ahmed A Soliman
- Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt.
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14
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Devereux M, O Shea D, Kellett A, McCann M, Walsh M, Egan D, Deegan C, Kedziora K, Rosair G, Müller-Bunz H. Synthesis, X-ray crystal structures and biomimetic and anticancer activities of novel copper(II)benzoate complexes incorporating 2-(4′-thiazolyl)benzimidazole (thiabendazole), 2-(2-pyridyl)benzimidazole and 1,10-phenanthroline as chelating nitrogen donor ligands. J Inorg Biochem 2007; 101:881-92. [PMID: 17397929 DOI: 10.1016/j.jinorgbio.2007.02.002] [Citation(s) in RCA: 144] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2006] [Revised: 02/06/2007] [Accepted: 02/07/2007] [Indexed: 10/23/2022]
Abstract
Cu(BZA)(2)(EtOH)(0.5) (1) was generated by the reaction of copper(II) hydroxide with benzoic acid (BZAH). [Cu(TBZH)(2)(BZA)](BZA).0.5TBZH.H(2)O (2) and [Cu(2-PyBZIMH)(2-PyBZIM)(BZA)].1.66EtOH (3) were obtained when 1 reacted with Thiabendazole (TBZH) and 2-(2-pyridyl)benzimidazole (2-PyBZIMH), respectively. [Cu(BZA)(2)(phen)(H(2)O)] (4) was isolated from the reaction of benzoic acid and 1,10-phenanthroline (phen) with copper(II)acetate dihydrate. Molecular structures of 2, 3 and 4 were determined crystallographically. 2 and 3 are hydrogen bonded dimers and trimers, respectively. The copper centres in complexes 2 and 3 are bis-chelate derivatives that have N(4)O ligation and their geometry is very similar being approximately square-pyramidal. However whereas in complex 2 both TBZH ligands are neutral in 3 one of the 2-PyBZIMH chelators is deprotonated on each copper. The structural results for 4 represent a re-examination of this crystallographically known compound for which no hydrogen atom coordinates have been previously reported. It crystallises as a hydrogen bonded dimmer and is a mono-chelate of phen with each copper centre possessing N(2)O(3) ligation and square pyramidal geometry. The catalase and superoxide dismutase (SOD) activities of the four complexes along with those of the known phenanthroline complexes [Cu(mal)(phen)(2)] and [Cu(phendione)(3)](ClO(4))(2) (malH(2)=malonic acid and phendione=1,10-phenanthroline-5,6-dione) were investigated. Complexes 1-4, the metal free ligands and a simple copper(II) salt were assessed for their cancer chemotherapeutic potential against the hepatocellular carcinoma (Hep-G(2)) and kidney adenocarcinoma (A-498) cell lines. TBZH, 2-PyBZIMH and benzoic acid when uncoordinated to a metal centre offer poor chemotherapeutic potential. copper(II) benzoate is significantly more active than the free acid. The bis-chelate derivatives [Cu(TBZH)(2)(BZA)](BZA).0.5TBZH.H(2)O (2) and [Cu(2-PyBZIMH)(2-PyBZIM)(BZA)].1.66EtOH (3) elicit a significant cytotoxic response to the cancer cell lines tested. Replacing TBZH and 2-PyBZIMH with phen to give [Cu(BZA)(2)(phen)(H(2)O)] (4) does not significantly increase the anti-cancer activity.
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Affiliation(s)
- Michael Devereux
- The Inorganic Pharmaceutical and Biomimetic Research Laboratory, Dublin Institute of Technology, Cathal Brugha Street, Dublin 1, Ireland.
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15
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Khalil MMH, Al-Seif FA. Synthesis and characterization of isatin complexes with M(CO)6, M=Cr or Mo. J COORD CHEM 2007. [DOI: 10.1080/00958970601026921] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Mostafa M. H. Khalil
- a Faculty of Science, Chemistry Department , Ain Shams University , Abbassia, Cairo, Egypt
| | - Foziah A. Al-Seif
- b Scientific Departments, Chemistry Department , Girls College of Education , Abha, KSA
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17
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El-Medani SM, Sharaby CM, Ramadan RM. Reactions and spectroscopic studies of Group 6 metal carbonyls with pyrazinecarboxamide and certain phosphine ligands. J COORD CHEM 2007. [DOI: 10.1080/00958970500130774] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Samir M. El-Medani
- a Chemistry Department , Faculty of Science, Cairo University , El-Faiyum Branch, El-Faiyum, Egypt
| | - Carmen M. Sharaby
- b Chemistry Department , Faculty of Science, El-Azhar University (Girls) , Cairo, Egypt
| | - Ramadan M. Ramadan
- c Chemistry Department , Faculty of Science, Ain Shams University , Cairo, Egypt
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18
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Ali† SA, Mohamed HA, Ramadan RM. Novel chromium and molybdenum complexes of a dimerized isonicotinic acid hydrazide. J COORD CHEM 2006. [DOI: 10.1080/00958970500356346] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Saadia A. Ali†
- a Chemistry Department , University College for Girls, Ain Shams University , Cairo, Egypt
| | - Hassan A. Mohamed
- b Chemistry Department, Faculty of Science , Cairo University El-Faiyum Branch , El-Faiyum, Egypt
| | - Ramadan M. Ramadan
- c Chemistry Department, Faculty of Science , Ain Shams University , Cairo, Egypt
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El-Medani * SM. Structural Studies of some Chromium, Molybdenum and Tungsten Complexes of N-Salicylidene-2-Hydroxyaniline. J COORD CHEM 2006. [DOI: 10.1080/00958970410001664965] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Samir M. El-Medani *
- a Chemistry Department , Faculty of Science, Cairo University , El-Faiyum Branch, El-Faiyum, Egypt
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20
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Ramadan RM, El-Medani SM, Ali OA, Mohamed HA. Spectroscopic and thermal studies of some Palladium complexes with certain Heterocyclic Nitrogen ligands. J COORD CHEM 2006. [DOI: 10.1080/00958970410001680363] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Ramadan M. Ramadan
- a Chemistry Department , Faculty of Science, Ain Shams University , Cairo, Egypt
| | - Samir M. El-Medani
- b Chemistry Department , Faculty of Science, Cairo University , El-Faiyum Branch, El-Faiyum, Egypt
| | - Omyma A.M. Ali
- c Chemistry Department , University College for Girls, Ain Shams University , Cairo, Egypt
| | - Hassan A. Mohamed
- b Chemistry Department , Faculty of Science, Cairo University , El-Faiyum Branch, El-Faiyum, Egypt
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21
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Mohamed HA, Ali SA, Ramadan RM. Spectroscopic and thermal studies of chromium(III), molybdenum(VI) and ruthenium(0) complexes of maleic hydrazide. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2006; 64:913-7. [PMID: 16458051 DOI: 10.1016/j.saa.2005.08.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2005] [Revised: 08/30/2005] [Accepted: 08/30/2005] [Indexed: 05/06/2023]
Abstract
Interaction of maleic hydrazide (LH(2)) with [Cr(CO)(6)] in air at atmospheric pressure resulted in the formation of the complex [(LH)Cr(mu-O)(2)Cr(LH)] (1). Reaction of LH(2) with [Mo(CO)(6)] in air also gave the complex [(LH(2))O(2)Mo(mu-O)(2)MoO(2)(LH(2))] (2). Under the same conditions, the reaction of LH(2) with [Ru(3)(CO)(12)] resulted in the formation of the tricarbonyl complex [Ru(CO)(3)(LH(2))] (3). The complexes were characterized by elemental analysis, IR, and (1)H NMR spectroscopy. The thermal properties of the complexes were investigated by thermogravimetry technique.
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Affiliation(s)
- Hassan A Mohamed
- Department of Chemistry, Faculty of Science, Cairo University, El-Faiyum Branch, El-Faiyum, Egypt
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22
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Photochemical reactions of chromium, molybdenum and tungsten hexacarbonyls with dimethylglyoxime. J Mol Struct 2006. [DOI: 10.1016/j.molstruc.2005.09.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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23
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Khalil MMH, Aboaly MM, Ramadan RM. Spectroscopic and electrochemical studies of ruthenium and osmium complexes of salicylideneimine-2-thiophenol Schiff base. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2005; 61:157-161. [PMID: 15556434 DOI: 10.1016/j.saa.2004.03.015] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2003] [Accepted: 03/24/2004] [Indexed: 05/24/2023]
Abstract
The reactions between [M(3)(CO)(12)], M = Ru and Os, and salicylideneimine-2-thiophenol Schiff base in THF under reflux gave [Ru(CO)(4)(satpH)] and [Os(CO)(3)(satpH(2))] complexes. Structures of the two complexes were proposed on the basis of spectroscopic studies. Magnetic study of [Ru(CO)(4)(satpH)] suggested that a change in oxidation state of the ruthenium atom from zero to +1 was achieved via oxidative addition of the SH group with a proton displacement to give a low-spin d(7) electronic configuration. UV-Vis spectra of the two complexes in different solvents exhibited visible bands due to metal-to-ligand charge transfer. Electrochemical investigation of the free ligand and complexes showed some cathodic and anodic irreversible peaks due to interconversions through electron transfer.
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Affiliation(s)
- M M H Khalil
- Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt
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Khalil MMH, Mohamed HA, El-Medani SM, Ramadan RM. New Group 6 metal carbonyl derivatives of 2-(2'(-pyridyl)benzimidazole: synthesis and spectroscopic studies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2003; 59:1341-1347. [PMID: 12659903 DOI: 10.1016/s1386-1425(02)00330-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Reaction of Cr(CO)(6) with 2-(2'-pyridyl)benzimidazole (pbiH) under reduced pressure resulted in the formation of the dinuclear complex [Cr(2)(CO)(6)(pbiH)(2)]. Infra-red (IR) spectroscopy revealed the presence of terminal and bridge Cr-CO bonds. Interaction of M(CO)(6), M=Cr, Mo and W, with pbiH in the presence of 2,2'-bipyridine (bpy) gave the tetracarbonyl complexes [M(CO)(4)(pbiH)].bpy. Spectroscopic studies of the complexes indicated the presence of hydrogen bonding between the bpy nitrogen and the NH group of pbiH. Reactions of M(CO)(6) with pbiH in the presence of PPh(3) gave the tricarbonyl monosubstituted derivatives [M(CO)(3)(PPh(3))(pbiH)]. The spectroscopic studies of the complexes suggested the proposed structures.
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Affiliation(s)
- Mostafa M H Khalil
- Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt
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