1
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Gao X, Ma M, Pedersen CM, Liu R, Zhang Z, Chang H, Qiao Y, Wang Y. Interactions between PAMAM-NH 2 and 6-Mercaptopurine: Qualitative and Quantitative NMR studies. Chem Asian J 2021; 16:3658-3663. [PMID: 34494362 DOI: 10.1002/asia.202100771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/24/2021] [Indexed: 11/09/2022]
Abstract
Despite being used as an anti-leukemic drug, the poor solubility of 6-mercaptopurine (6-MP) limits its use in topical and parenteral applications. Dendrimers are commonly used as drug carriers to improve their solubility in aqueous solution. In this work, the interactions between 6-MP and the amine-terminated poly(amidoamine) dendrimers (PAMAM-NH2 ) were investigated by various NMR technology. The chemical shift titrations disclosed that the 6-MP interacted with the surface of PAMAM-NH2 mainly through electrostatics. The determination of diffusion coefficient and relaxation measurements further confirmed the presence of interactions in 6-MP/PAMAM-NH2 complexes. In addition, the encapsulation of 6-MP within the cavity of PAMAM-NH2 was revealed through nuclear Overhauser effect spectroscopy and Saturation Transfer Double Difference analysis. Finally, the binding strength (H-8 is 100% and H-2 is 70%) of 6-MP to PAMAM-NH2 was quantitatively expressed using epitope maps. This study provides a systematic methodology for qualitative and quantitative studies of the interactions between dendrimers and drug molecules in general.
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Affiliation(s)
- Xueke Gao
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan, 030001, P. R. China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Minjun Ma
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan, 030001, P. R. China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Christian Marcus Pedersen
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100, Copenhagen, Denmark
| | - Rui Liu
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Zhenzhou Zhang
- School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, P. R. China
| | - Honghong Chang
- Shanxi Xuanran Pharmaceutical Technology Co., Ltd., Jinzhong, 030600, P. R. China
| | - Yan Qiao
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan, 030001, P. R. China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yingxiong Wang
- State Key Laboratory of Coal Conversion Institute of Coal Chemistry, Chinese Academy of Sciences, 27 South Taoyuan Road, Taiyuan, 030001, P. R. China.,Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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2
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Lobana TS. Heterocyclic-2-thione derivatives of group 10–12 metals: Coordination versatility, activation of C S (thione) bonds and biochemical potential. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213884] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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3
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Sharfalddin AA, Emwas A, Jaremko M, Hussien MA. Transition metal complexes of 6‐mercaptopurine: Characterization, Theoretical calculation, DNA‐Binding, molecular docking, and anticancer activity. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.6041] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Abeer A. Sharfalddin
- Department of Chemistry, Faculty of Science King Abdulaziz University Jeddah Saudi Arabia
| | - Abdul‐Hamid Emwas
- Imaging and Characterization Core Lab King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia
| | - Mariusz Jaremko
- Biological and Environmental Science and Engineering (BESE) King Abdullah University of Science and Technology (KAUST) Thuwal Saudi Arabia
| | - Mostafa A. Hussien
- Department of Chemistry, Faculty of Science King Abdulaziz University Jeddah Saudi Arabia
- Department of Chemistry, Faculty of Science Port Said University Port Said Egypt
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4
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Aseman MD, Aryamanesh S, Shojaeifard Z, Hemmateenejad B, Nabavizadeh SM. Cycloplatinated(II) Derivatives of Mercaptopurine Capable of Binding Interactions with HSA/DNA. Inorg Chem 2019; 58:16154-16170. [DOI: 10.1021/acs.inorgchem.9b02696] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
| | - Shiva Aryamanesh
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71467-13565, Iran
| | - Zahra Shojaeifard
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71467-13565, Iran
| | - Bahram Hemmateenejad
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71467-13565, Iran
- Medicinal and Natural Products Chemistry Research Center, Shiraz University of Medical Sciences, Shiraz, 71348-53734, Iran
| | - S. Masoud Nabavizadeh
- Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71467-13565, Iran
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5
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Synthesis, spectral characterization and in vitro antibacterial evaluation and Petra/Osiris/Molinspiration analyses of new Palladium(II) iodide complexes with thioamides. ALEXANDRIA JOURNAL OF MEDICINE 2019. [DOI: 10.1016/j.ajme.2015.10.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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6
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Nadeem S, Sirajuddin M, Ahmad S, Yaqub S, Ali MI, Tirmizi SA, Ali S, Hameed A. Synthesis, Spectral Characterization, In Vitro Antibacterial Evaluation and POM Analyses of Palladium(II) Thiocyanate Complexes of Thioamides. Pharm Chem J 2017. [DOI: 10.1007/s11094-017-1695-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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7
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Synthesis, characterization, DFT calculations and antibacterial activity of palladium(II) cyanide complexes with thioamides. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.03.098] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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8
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Alam MN, Huq F. Comprehensive review on tumour active palladium compounds and structure–activity relationships. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.02.001] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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9
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Perea-Cachero A, Seoane B, Diosdado B, Téllez C, Coronas J. Synthesis, structure and characterization of a layered coordination polymer based on Zn(ii) and 6-(methylmercapto)purine. RSC Adv 2016. [DOI: 10.1039/c5ra23134e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A layered coordination polymer was synthesized from Zn(ii) and 6-(methylmercapto)purine (mMP-H) in N,N-dimethylformamide (DMF). Its structure and formula [Zn2(μ2-mMP)3(NO3)(DMF)(H2O)]n·nDMF were determined by single crystal X-ray diffraction.
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Affiliation(s)
- Adelaida Perea-Cachero
- Chemical and Environmental Engineering Department and Instituto de Nanociencia de Aragón (INA)
- Universidad de Zaragoza
- 50018 Zaragoza
- Spain
| | - Beatriz Seoane
- Chemical and Environmental Engineering Department and Instituto de Nanociencia de Aragón (INA)
- Universidad de Zaragoza
- 50018 Zaragoza
- Spain
- Catalysis Engineering
| | - Beatriz Diosdado
- X-ray Diffraction and Fluorescence Analysis Service
- Universidad de Zaragoza
- 50009 Zaragoza
- Spain
| | - Carlos Téllez
- Chemical and Environmental Engineering Department and Instituto de Nanociencia de Aragón (INA)
- Universidad de Zaragoza
- 50018 Zaragoza
- Spain
| | - Joaquín Coronas
- Chemical and Environmental Engineering Department and Instituto de Nanociencia de Aragón (INA)
- Universidad de Zaragoza
- 50018 Zaragoza
- Spain
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10
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Gokhale N, Panathur N, Dalimba U, Nayak PG, Pai KSR. Novel Indole-Quinazolinone Based Amides as Cytotoxic Agents. J Heterocycl Chem 2015. [DOI: 10.1002/jhet.2403] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Nikhila Gokhale
- Organic Chemistry Laboratory, Department of Chemistry; National Institute of Technology Karnataka; Surathkal, Srinivasanagar Mangalore 575025 India
| | - Naveen Panathur
- Organic Chemistry Laboratory, Department of Chemistry; National Institute of Technology Karnataka; Surathkal, Srinivasanagar Mangalore 575025 India
| | - Udayakumar Dalimba
- Organic Chemistry Laboratory, Department of Chemistry; National Institute of Technology Karnataka; Surathkal, Srinivasanagar Mangalore 575025 India
| | - Pawan G. Nayak
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences; Manipal University; Manipal 576104 Karnataka
| | - K. Sreedhar Ranganath Pai
- Department of Pharmacology, Manipal College of Pharmaceutical Sciences; Manipal University; Manipal 576104 Karnataka
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11
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Sharma M, Koty A, Srivastava M, Srivastava A. FTIR,1H NMR, ESR, TGA and DTA Analysis of Trithiocarbonates of Captopril and 6-Mercaptopurine as Their Palladium(II) Chloride Complexes. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.200700202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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12
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13
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Cuin A, Massabni AC, Pereira GA, Leite CQF, Pavan FR, Sesti-Costa R, Heinrich TA, Costa-Neto CM. 6-Mercaptopurine complexes with silver and gold ions: Anti-tuberculosis and anti-cancer activities. Biomed Pharmacother 2011; 65:334-8. [DOI: 10.1016/j.biopha.2011.04.012] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2010] [Accepted: 04/07/2011] [Indexed: 01/15/2023] Open
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14
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Łakomska I, Fandzloch M, Wojtczak A, Szłyk E. Platinum(IV) coordination compounds containing 5-methyl-1,2,4-triazolo[1,5-a]pyrimidin-7(4H)-one as nonleaving ligand. Molecular and cytotoxicity in vitro characterization. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 79:497-501. [PMID: 21536486 DOI: 10.1016/j.saa.2011.03.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Revised: 02/20/2011] [Accepted: 03/09/2011] [Indexed: 05/30/2023]
Abstract
Novel platinum(IV) coordination compounds with 5-methyl-1,2,4-triazolo[1,5-a]pyrimidin-7(4H)-one (HmtpO): cis-trans-[PtCl(2)(OH)(2)(NH(3))(HmtpO)] (1), cis-trans-[PtCl(5)(HmtpO)][(CH(3))(2)NH(2)] (2) have been prepared and structurally characterized by spectroscopic methods ((1)H, IR and X-ray crystallography (2)). The X-ray results indicate that the local geometry around the platinum(IV) centre approximates a typical octahedral arrangement with nitrogen atom N3 of the HmtpO and three chloride atoms in equatorial positions. The remaining two axial positions are occupied by two chlorides. The preliminary assessment of antitumor properties of (1) was performed as an in vitro antiproliferative activity against HL-60 human acute promyelocytic leukemia and HCV29T bladder cancer. The cis-trans-[PtCl(2)(OH)(2)(NH(3))(HmtpO)] (1) exhibits higher cytotoxic activity against HL-60 (IC(50)=6.4 μM) than cisplatin.
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Affiliation(s)
- Iwona Łakomska
- Faculty of Chemistry, Nicolaus Copernicus University, Gagarina 7, 87-100 Toruń, Poland.
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15
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Nadeem S, Bolte M, Ahmad S, Fazeelat T, Tirmizi SA, Rauf MK, Sattar SA, Siddiq S, Hameed A, Haider SZ. Synthesis, crystal structures and, antibacterial and antiproliferative activities in vitro of palladium(II) complexes of triphenylphosphine and thioamides. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.06.015] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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16
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Ahmad S, Rüffer T, Lang H, Nadeem S, Tirmizi SA, Saleem M, Anwar A. Synthesis, crystal structure, and antimicrobial studies of trans-[Pd(PPh3)2(imidazolidine-2-thione)2]Cl2 · 3.5H2O. RUSS J COORD CHEM+ 2010. [DOI: 10.1134/s1070328410070079] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Synthesis, characterization and antibacterial activity of palladium(II) bromide complexes of thioamides; X-ray structure of [Pd(tetramethylthiourea)4]Br2. TRANSIT METAL CHEM 2010. [DOI: 10.1007/s11243-010-9363-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Palladium coordination compounds as anti-viral, anti-fungal, anti-microbial and anti-tumor agents. Coord Chem Rev 2009. [DOI: 10.1016/j.ccr.2008.09.011] [Citation(s) in RCA: 365] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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19
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Molecular structure and antitumor activity of platinum(II) complexes containing purine analogs. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2008.02.030] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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20
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Łakomska I, Wojtczak A, Sitkowski J, Kozerski L, Szłyk E. Platinum(IV) complexes with purine analogs. Studies of molecular structure and antiproliferative activity in vitro. Polyhedron 2008. [DOI: 10.1016/j.poly.2008.05.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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21
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Lu BY, Li H, Deng H, Xu Z, Li WS, Chen HY. Voltammetric determination of 6-mercaptopurine using [Co(phen)3]3+/MWNT modified graphite electrode. J Electroanal Chem (Lausanne) 2008. [DOI: 10.1016/j.jelechem.2008.04.018] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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22
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Bednarek E, Sitkowski J, Kawecki R, Kozerski L, Bocian W, Pazderski L, Priebe W. Structure and dynamics of methyl cis-3,4-diamino-2,3,4,6-tetradeoxy-alpha-L-lyxo-hexopyranoside complexes with PtCl(2) and PdCl(2), by (1)H, (2)H, (13)C, (15)N and (195)Pt NMR spectroscopy in DMSO, CD(3)CN and H(2)O. Dalton Trans 2008:4129-37. [PMID: 18688431 DOI: 10.1039/b805572f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pd(II) and Pt(II) chloride complexes with LL = methyl cis-3,4-diamino-2,3,4,6-tetradeoxy-alpha-l-lyxo-hexopyranoside of the formulae [Pd(LL)Cl(2)] and [Pt(LL)Cl(2)], 1, were studied by (1)H, (2)H, (13)C, (15)N and (195)Pt NMR spectroscopy. These techniques were applied for characterization of the structure and ligand exchange dynamics, in case of diastereomeric species formed from 1 in DMSO-d(6), DMSO-h(6) and H(2)O; their general formula was [Pt(LL)XY](+) (X = Cl, Y = DMSO-d(6), 2a; X = DMSO-d(6), Y = Cl, 2b; X = Cl, Y = DMSO-h(6), 2a'; X = DMSO-h(6), Y = Cl, 2b'; X = Cl, Y = H(2)O, 3a; X = H(2)O, Y = Cl, 3b). Their theoretical structures and NMR parameters, calculated at the level of DFT approach, were also presented and compared to the experimental data. The model complex [Pt(trans-diaminocyclohexane)Cl(2)], 4, was studied as well. To the best of our knowledge, this work is the first account dealing with the detailed analysis of structure and dynamics of ligand exchange processes in organic solvents and water, performed for a PtCl(2) complex containing a diaminosugar moiety. The kinetic behavior of the studied coordination compounds suggests that some of them may be potentially active in bioassays against cancer cells. Compound 1 exhibits noticeable versatile ligand exchange possibilities in DMSO and H(2)O. Particularly, it undergoes solvolysis in DMSO-d(6), exchanging one chloride atom and yielding two diastereomers 2a and 2b; the former, being the kinetically favored species, has the DMSO-d(6) ligand syn to the N(3) atom. The lyophilisate of the respective 2a + 2b mixture, earlier equilibrated in DMSO-d(6), after dissolving in H(2)O yields only the latter isomer, which is thermodynamically favored. The solvolysis of 1 in H(2)O yields instantaneously two diastereomeric monoaquated species, 3a and 3b, amounting to 10% of each.
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Affiliation(s)
- Elzbieta Bednarek
- National Medicines Institute, Chełmska 30/34, 00-725, Warsaw, Poland
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23
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Husain K, Abid M, Azam A. Synthesis, characterization and antiamoebic activity of new indole-3-carboxaldehyde thiosemicarbazones and their Pd(II) complexes. Eur J Med Chem 2007; 42:1300-8. [PMID: 17442460 DOI: 10.1016/j.ejmech.2007.02.012] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2007] [Accepted: 02/19/2007] [Indexed: 10/23/2022]
Abstract
In continuation of our research on thiosemicarbazones and their metal complexes as antiamoebic agents, a new series of indole-3-carboxaldehyde thiosemicarbazones (TSC) 1-7 were prepared by condensing indole-3-carboxaldehyde with cycloalkylaminothiocarbonyl hydrazines. Their palladium(II) complexes of the [Pd(TSC)Cl2] type, were synthesized upon coordination with [Pd(DMSO)2Cl2]. The chemical structures of all the compounds were established by elemental analyses, electronic, IR, (1)H NMR and (13)C NMR spectral data. The structure of the complexes was further established by thermogravimetric analysis and FAB MS. Spectroscopic data revealed that thiosemicarbazones act as bidentate ligands, making use of thione sulphur and azomethine nitrogen atom for coordination to the Pd(II) ion. Among all the compounds evaluated for antiamoebic activity using HM1:IMSS strain of Entamoeba histolytica, all palladium complexes were found to be more active than their respective ligands. Moreover, ligand 5 and complexes 1a-3a, 5a and 7a showed antiamoebic activity, at lower IC(50) doses when compared to the reference drug metronidazole with IC(50)=1.81 microM.
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Affiliation(s)
- Kakul Husain
- Department of Chemistry, Jamia Millia Islamia, Jamia Nagar, New Delhi 110025, India
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The studies of tautomerism in 6-mercaptopurine derivatives by 1H–13C, 1H–15N NMR and 13C, 15N CPMAS-experimental and quantum chemical approach. J Mol Struct 2006. [DOI: 10.1016/j.molstruc.2005.10.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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25
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Pazderski L, Szłyk E, Sitkowski J, Kamieński B, Kozerski L, Tousek J, Marek R. Experimental and quantum-chemical studies of 15N NMR coordination shifts in palladium and platinum chloride complexes with pyridine, 2,2'-bipyridine and 1,10-phenanthroline. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2006; 44:163-70. [PMID: 16392105 DOI: 10.1002/mrc.1740] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
A series of Pd and Pt chloride complexes with pyridine (py), 2,2'-bipyridine (bpy) and 1,10-phenanthroline (phen), of general formulae trans-/cis-[M(py)2Cl2], [M(py)4]Cl2, trans-/cis-[M(py)2Cl4], [M(bpy)Cl2], [M(bpy)Cl4], [M(phen)Cl2], [M(phen)Cl4], where M = Pd, Pt, was studied by 1H, 195Pt, and 15N NMR. The 90-140 ppm low-frequency 15N coordination shifts are discussed in terms of such structural features of the complexes as the type of platinide metal, oxidation state, coordination sphere geometry and the type of ligand. The results of quantum-chemical NMR calculations were compared with the experimental 15N coordination shifts, well reproducing their magnitude and correlation with the molecular structure.
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Affiliation(s)
- Leszek Pazderski
- Faculty of Chemistry, Nicholas Copernicus University, Gagarina 7, PL-87100, Toruń, Poland.
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