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Rath NP, Holmes SM. Structure-property studies of a new {FeIII2MnII} complex. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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2
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Hao X, Dou Y, Cao T, Qin L, Zhou Z, Yang L, Li D, Liu Q, Li Y, Zhang D. One-dimensional cyanide-bridged Fe(III)–Mn(II) magnetic complexes with different configurations derived from a new pentacyanoiron(III) building block. TRANSIT METAL CHEM 2020. [DOI: 10.1007/s11243-020-00389-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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3
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Zorina LV, Simonov SV, Sasnovskaya VD, Talantsev AD, Morgunov RB, Mironov VS, Yagubskii EB. Slow Magnetic Relaxation, Antiferromagnetic Ordering, and Metamagnetism in Mn II (H 2 dapsc)-Fe III (CN) 6 Chain Complex with Highly Anisotropic Fe-CN-Mn Spin Coupling. Chemistry 2019; 25:14583-14597. [PMID: 31361924 DOI: 10.1002/chem.201902551] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 07/29/2019] [Indexed: 11/07/2022]
Abstract
Reactions of [Mn(H2 dapsc)Cl2 ]⋅H2 O (dapsc=2,6- diacetylpyridine bis(semicarbazone)) with K3 [Fe(CN)6 ] and (PPh4 )3 [Fe(CN)6 ] lead to the formation of the chain polymeric complex {[Mn(H2 dapsc)][Fe(CN)6 ][K(H2 O)3.5 ]}n ⋅1.5n H2 O (1) and the discrete pentanuclear complex {[Mn(H2 dapsc)]3 [Fe(CN)6 ]2 (H2 O)2 }⋅4 CH3 OH⋅3.4 H2 O (2), respectively. In the crystal structure of 1 the high-spin [MnII (H2 dapsc)]2+ cations and low-spin hexacyanoferrate(III) anions are assembled into alternating heterometallic cyano-bridged chains. The K+ ions are located between the chains and are coordinated by oxygen atoms of the H2 dapsc ligand and water molecules. The magnetic structure of 1 is built from ferrimagnetic chains, which are antiferromagnetically coupled. The complex exhibits metamagnetism and frequency-dependent ac magnetic susceptibility, indicating single-chain magnetic behavior with a Mydosh-parameter φ=0.12 and an effective energy barrier (Ueff /kB ) of 36.0 K with τ0 =2.34×10-11 s for the spin relaxation. Detailed theoretical analysis showed highly anisotropic intra-chain spin coupling between [FeIII (CN)6 ]3- and [MnII (H2 dapsc)]2+ units resulting from orbital degeneracy and unquenched orbital momentum of [FeIII (CN)6 ]3- complexes. The origin of the metamagnetic transition is discussed in terms of strong magnetic anisotropy and weak AF interchain spin coupling.
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Affiliation(s)
- Leokadiya V Zorina
- Institute of Solid State Physics, Russian Academy of Sciences, Academician Ossipyan Str. 2, Chernogolovka MD, Russia
| | - Sergey V Simonov
- Institute of Solid State Physics, Russian Academy of Sciences, Academician Ossipyan Str. 2, Chernogolovka MD, Russia
| | - Valentina D Sasnovskaya
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Semenov's av. 1, Chernogolovka, MD, Russia
| | - Artem D Talantsev
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Semenov's av. 1, Chernogolovka, MD, Russia
| | - Roman B Morgunov
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Semenov's av. 1, Chernogolovka, MD, Russia
| | - Vladimir S Mironov
- Shubnikov Institute of Crystallography of Federal Scientific Research, Centre "Crystallography and Photonics", Russian Academy of Sciences, Leninskii av. 59, Moscow, Russia
| | - Eduard B Yagubskii
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Semenov's av. 1, Chernogolovka, MD, Russia
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Alexandru MG, Marino N, Visinescu D, De Munno G, Andruh M, Bentama A, Lloret F, Julve M. A novel octacyanido dicobalt(iii) building block for the construction of heterometallic compounds. NEW J CHEM 2019. [DOI: 10.1039/c9nj00420c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The first bimetallic 3d cyanido-bearing complex with 2,5-dpp as a bridge, (Ph4P)2[Co2III(μ-2,5-dpp)(CN)8]·2H2O, is obtained and used as a metalloligand with the [Mn(MAC)(H2O)2]2+ cation to build a {CoIIIMnII} heterobimetallic chain.
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Affiliation(s)
- Maria-Gabriela Alexandru
- Department of Inorganic Chemistry
- Physical Chemistry and Electrochemistry
- Faculty of Applied Chemistry and Materials Science
- University Politehnica of Bucharest
- 011061 Bucharest
| | - Nadia Marino
- Dipartimento di Chimica e Tecnologie Chimiche
- Università della Calabria
- 87036 Rende
- Italy
| | - Diana Visinescu
- Coordination and Supramolecular Chemistry Laboratory
- “Ilie Murglescu” Institute of Physical Chemistry
- Romanian Academy
- Bucharest 060021
- Romania
| | - Giovanni De Munno
- Dipartimento di Chimica e Tecnologie Chimiche
- Università della Calabria
- 87036 Rende
- Italy
| | - Marius Andruh
- Inorganic Chemistry Laboratory
- Faculty of Chemistry
- University of Bucharest
- Bucharest
- Romania
| | - Abdeslem Bentama
- Laboratoire de Chimie Organique Appliquée
- Faculté des Sciences Techniques de Fès
- Université Sidi Mohammed Ben Abdellah
- Fès
- Morocco
| | - Francesc Lloret
- Departament de Química Inorgànica/Instituto de Ciencia Molecular (ICMol)
- Universitat de València
- 46990 Paterna
- Spain
| | - Miguel Julve
- Departament de Química Inorgànica/Instituto de Ciencia Molecular (ICMol)
- Universitat de València
- 46990 Paterna
- Spain
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5
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Cyano bridged heterometallic Mn(II)-Fe(III) aggregates: Synthesis, structure and magnetic properties. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.08.048] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Pichon C, Elrez B, Béreau V, Duhayon C, Sutter JP. From Heptacoordinated CrIII
Complexes with Cyanide or Isothiocyanate Apical Groups to 1D Heterometallic Assemblages with All-Pentagonal-Bipyramid Coordination Geometries. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700845] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Céline Pichon
- LCC (Laboratoire de Chimie de Coordination); CNRS; 205 Route de Narbonne 31077 Toulouse France
- UPS; INPT; Université de Toulouse; 31007 Toulouse France
| | - Bahjat Elrez
- LCC (Laboratoire de Chimie de Coordination); CNRS; 205 Route de Narbonne 31077 Toulouse France
- UPS; INPT; Université de Toulouse; 31007 Toulouse France
| | - Virginie Béreau
- LCC (Laboratoire de Chimie de Coordination); CNRS; 205 Route de Narbonne 31077 Toulouse France
- UPS; INPT; Université de Toulouse; 31007 Toulouse France
| | - Carine Duhayon
- LCC (Laboratoire de Chimie de Coordination); CNRS; 205 Route de Narbonne 31077 Toulouse France
- UPS; INPT; Université de Toulouse; 31007 Toulouse France
| | - Jean-Pascal Sutter
- LCC (Laboratoire de Chimie de Coordination); CNRS; 205 Route de Narbonne 31077 Toulouse France
- UPS; INPT; Université de Toulouse; 31007 Toulouse France
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Gavey EL, Pilkington M. Coordination complexes of 15-membered pentadentate aza, oxoaza and thiaaza Schiff base macrocycles “Old Complexes Offer New Attractions”. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.03.017] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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8
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Şenocak A, Karadağ A, Soylu MS, Andaç Ö. Two novel cyanido-bridged polymeric complexes with suspension bridge type connections and a series of related complex salts: crystallographic and thermal characterizations. NEW J CHEM 2015. [DOI: 10.1039/c5nj00071h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Polymeric complexes exhibiting interesting suspension bridge type binding and dissimilarity in complex formation behavior of 8B group members were studied.
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Affiliation(s)
- Ayşegül Şenocak
- Department of Chemistry
- College of Art and Science
- Gaziosmanpaşa University
- 60240, Tokat
- Turkey
| | - Ahmet Karadağ
- Department of Chemistry
- College of Art and Science
- Gaziosmanpaşa University
- 60240, Tokat
- Turkey
| | - Mustafa Serkan Soylu
- Department of Physics
- Faculty of art and sciences
- Giresun University
- 28100, Giresun
- Turkey
| | - Ömer Andaç
- Department of Chemistry
- College of Art and Science
- Ondokuzmayıs University
- 55139, Samsun
- Turkey
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Zhang SL, Zhao XH, Wang XY. Syntheses, structures, and magnetic properties of three new cyano-bridged complexes based on the [Mn(CN)6]3−building block. Dalton Trans 2015; 44:15189-97. [DOI: 10.1039/c5dt00038f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
By tuning the reaction conditions and using macrocyclic ligands, three [Mn(CN)6]3−-based magnetic complexes were prepared and characterized.
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Affiliation(s)
- Shao-Liang Zhang
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Xin-Hua Zhao
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Xin-Yi Wang
- State Key Laboratory of Coordination Chemistry
- Collaborative Innovation Center of Advanced Microstructures
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
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10
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New bidimensional honeycomb CoII–FeIII and brick wall FeII–CoIII cyanido-bridged coordination polymers: Synthesis, crystal structures and magnetic properties. Polyhedron 2014. [DOI: 10.1016/j.poly.2014.03.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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11
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Racles C, Silion M, Stanica N, Cazacu M, Turta C. New siloxane-containing iron(III) carboxylate clusters. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.03.024] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Zhang D, Zhao Z, Wang P, Chen X. Three Cyanide-Bridged One-Dimensional Single Chain Co III-Mn IIComplexes: Rational Design, Synthesis, Crystal Structures and Magnetic Properties. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.5.1581] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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13
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Karipcin F, Culu B, Sharma SK, Qanungo K. Cyano-Bridged ‘Oximato’ Complexes: Synthesis, Structure, and Catalase-Like Activities. Helv Chim Acta 2012. [DOI: 10.1002/hlca.201100314] [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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14
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Nastase S, Maxim C, Andruh M, Cano J, Ruiz-Pérez C, Faus J, Lloret F, Julve M. New cyanide-bridged Mn(III)-M(III) heterometallic dinuclear complexes constructed from [M(III)(AA)(CN)4]- building blocks (M = Cr and Fe): synthesis, crystal structures and magnetic properties. Dalton Trans 2011; 40:4898-908. [PMID: 21442115 DOI: 10.1039/c0dt01815e] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Three Mn(III)-M(III) (M = Cr and Fe) dinuclear complexes have been obtained by assembling [Mn(III)(SB)(H(2)O)](+) and [M(III)(AA)(CN)(4)](-) ions, where SB is the dianion of the Schiff-base resulting from the condensation of 3-methoxysalicylaldehyde with ethylenediamine (3-MeOsalen(2-)) or 1,2-cyclohexanediamine (3-MeOsalcyen(2-)): [Mn(3-MeOsalen)(H(2)O)(µ-NC)Cr(bipy)(CN)(3)]·2H(2)O (1), [Mn(3-MeOsalen)(H(2)O)(µ-NC)Cr(ampy)(CN)(3)][Mn(3-MeOsalen)(H(2)O)(2)]ClO(4)·2H(2)O (2) and [Mn(3-MeOsalcyen)(H(2)O)(µ-NC)Fe(bpym)(CN)(3)]·3H(2)O (3) (bipy = 2,2'-bipyridine, ampy = 2-aminomethylpyridine and bpym = 2,2'-bipyrimidine). The [M(AA)(CN)(4)](-) unit in 1-3 acts as a monodentate ligand towards the manganese(III) ion through one of its four cyanide groups. The manganese(III) ion in 1-3 exhibits an elongated octahedral stereochemistry with the tetradentate SB building the equatorial plane and a water molecule and a cyanide-nitrogen atom filling the axial positions. Remarkably, the neutral mononuclear complex [Mn(3-MeOsalen)(H(2)O)(2)]ClO(4) co-crystallizes with the heterobimetallic unit in 2. The values of the Mn(III)-M(III) distance across the bridging cyanide are 5.228 (1), 5.505 (2) and 5.265 Å (3). The packing of the neutral heterobimetallic units in the crystal is governed by the self-complementarity of the [Mn(SB)(H(2)O)](+) moieties, which interact each other through hydrogen bonds established between the aqua ligand from one fragment with the set of phenolate- and methoxy-oxygens from the adjacent one. The magnetic properties of the three complexes have been investigated in the temperature range 1.9-300 K. Weak antiferromagnetic interactions between the Mn(III) and M(III) ions across the cyanido bridge were found: J(MnM) = -5.6 (1), -0.63 (2) and -2.4 cm(-1) (3) the Hamiltonian being defined as H = -JS(Mn)·S(M). Theoretical calculations based on density functional theory (DFT) have been used to substantiate both the nature and magnitude of the exchange interactions observed and also to analyze the dependence of the magnetic coupling on the structural parameters within the Mn(III)-N-C-M(III) motif in 1-3.
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Affiliation(s)
- Silviu Nastase
- Inorganic Chemistry Laboratory, Faculty of Chemistry, University of Bucharest, Str. Dumbrava Rosie nr. 23, 020464, Bucharest, Romania
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Jiang N, Li FY, Xu L, Zhao L, Wang YC. [Mn(C4H10ON)(H2O)][Fe(CN)6]: A Three-Dimensional Cyanide-Bridged Ferrimagnet with a Morpholine Ligand. Inorg Chem 2010; 50:1544-50. [DOI: 10.1021/ic102145s] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ning Jiang
- Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, People’s Republic of China
| | - Feng-Yan Li
- Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, People’s Republic of China
| | - Lin Xu
- Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, People’s Republic of China
| | - Li−Li Zhao
- Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, People’s Republic of China
| | - Yu-Chao Wang
- Key Laboratory of Polyoxometalates Science of Ministry of Education, College of Chemistry, Northeast Normal University, Changchun 130024, People’s Republic of China
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Shakir M, Chishti H, Azim Y, Begum N. Synthesis and Characterization of Hexaazamacrocyclic Complexes with Co(II), Ni(II), Cu(II), and Zn(II) Derived from Phthalaldehyde and 2,6‐Diaminopyridine. ACTA ACUST UNITED AC 2010. [DOI: 10.1081/sim-120035959] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Mohammad Shakir
- a Department of Chemistry, Division of Inorganic Chemistry , Aligarh Muslim University , Aligarh, 202002, India
| | - Hamida‐tun‐nisa Chishti
- a Department of Chemistry, Division of Inorganic Chemistry , Aligarh Muslim University , Aligarh, 202002, India
| | - Yasser Azim
- a Department of Chemistry, Division of Inorganic Chemistry , Aligarh Muslim University , Aligarh, 202002, India
| | - Nishat Begum
- a Department of Chemistry, Division of Inorganic Chemistry , Aligarh Muslim University , Aligarh, 202002, India
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Shatruk M, Avendano C, Dunbar KR. Cyanide-Bridged Complexes of Transition Metals: A Molecular Magnetism Perspective. PROGRESS IN INORGANIC CHEMISTRY 2009. [DOI: 10.1002/9780470440124.ch3] [Citation(s) in RCA: 197] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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18
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Zhao CC, Ni WW, Tao J, Cui AL, Kou HZ. Ligand-directed assembly of cyanide-bridged bimetallic MnIIFeIIIcoordination polymers based on the pentacyanoferrite(III) building blocks. CrystEngComm 2009. [DOI: 10.1039/b812117f] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Ishiruji FHO, Evans DJ, Benedito FL, Nunes FS. A new pentanuclear cyano-bridged complex [(Fe(II)(tetraazamacrocycle))3{mu-NC-FeIII(CN)5)2]: synthesis, spectroscopic and magnetic characterization. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2008; 70:1029-1033. [PMID: 18343185 DOI: 10.1016/j.saa.2007.10.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2007] [Revised: 10/04/2007] [Accepted: 10/15/2007] [Indexed: 05/26/2023]
Abstract
Hexacyanoferrate(III) reacts with [FeII(meso)(CH3CN)2](ClO4)2.2CH3CN (meso=5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane) in acetonitrile/water mixture producing the title complex, where three [Fe(meso)]2+ units are connected by two [Fe(CN)6](3-) anions. Molecular modeling (MM+) shows a fairly linear molecule and Mössbauer data are consistent with two terminal pentacoordinated low spin iron(II)-meso units linked to one hexacoordinated low spin iron(II)-meso through two hexacoordinated low spin iron(III) units. Spectroscopic characterization showed a typical mixed-valence charge transfer band and the degree of electron coupling was calculated to be H(AB)=678 cm(-1). Magnetic properties exhibited an antiferromagnetic exchange interaction between the iron(III) ions with a coupling constant J= -44 cm(-1).
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Affiliation(s)
- Fabiana H O Ishiruji
- Departamento de Química, Universidade Federal do Paraná, Centro Politécnico, C.P. 19081, 81531-990, Curitiba, PR, Brazil
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Cavichiolo LJ, Hörner M, dos Reis Crespan E, Vaz MGF, Evans DJ, Nunes FS. Synthesis, Structure and Properties of a Trinuclear μ-Cyano Tetracyanodinitrosylferrate Copper Complex. Z Anorg Allg Chem 2008. [DOI: 10.1002/zaac.200800127] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Paraschiv C, Andruh M, Journaux Y, Žak Z, Kyritsakas N, Ricard L. Trinuclear magnetic clusters based on cyanide metal complexes: synthesis, crystal structures, and magnetic properties of four new [MnII2MIII] complexes (M = Cr, Fe, Co). ACTA ACUST UNITED AC 2006. [DOI: 10.1039/b602055k] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Ni ZH, Kou HZ, Zheng L, Zhao YH, Zhang LF, Wang RJ, Cui AL, Sato O. Assembly of Azido- or Cyano-Bridged Binuclear Complexes Containing the Bulky [Mn(phen)2]2+ Building Block: Syntheses, Crystal Structures, and Magnetic Properties. Inorg Chem 2005; 44:4728-36. [PMID: 15962981 DOI: 10.1021/ic050181b] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two new cyano-bridged heterobinuclear complexes, [Mn(II)(phen)2Cl][Fe(III)(bpb)(CN)2] x 0.5CH3CH2OH x 1.5H2O (1) and [Mn(II)(phen)2Cl][Cr(III)(bpb)(CN)2] x 2H2O (2) [phen = 1,10-phenanthroline; bpb(2-) = 1,2-bis(pyridine-2-carboxamido)benzenate], and four novel azido-bridged Mn(II) dimeric complexes, [Mn2(phen)4(mu(1,1)-N3)2][M(III)(bpb)(CN)2]2 x H2O [M = Fe (3), Cr (4), Co (5)] and [Mn2(phen)4(mu(1,3)-N3)(N3)2]BPh4 x 0.5H2O (6), have been synthesized and characterized by single-crystal X-ray diffraction analysis and magnetic studies. Complexes 1 and 2 comprise [Mn(phen)2Cl]+ and [M(bpb)(CN)2]- units connected by one cyano ligand of [M(bpb)(CN)2]-. Complexes 3-5 are doubly end-on (EO) azido-bridged Mn(II) binuclear complexes with two [M(bpb)(CN)2]- molecules acting as charge-compensating anions. However, the Mn(II) ions in complex 6 are linked by a single end-to-end (EE) azido bridging ligand with one large free BPh4(-) group as the charge-balancing anion. The magnetic coupling between Mn(II) and Fe(III) or Cr(III) in complexes 1 and 2 was found to be antiferromagnetic with J(MnFe) = -2.68(3) cm(-1) and J(MnCr) = -4.55(1) cm(-1) on the basis of the Hamiltonian H = -JS(Mn)S(M) (M = Fe or Cr). The magnetic interactions between two Mn(II) ions in 3-5 are ferromagnetic in nature with the magnetic coupling constants of 1.15(3), 1.05(2), and 1.27(2) cm(-1) (H = -JS(Mn1)S(Mn2)), respectively. The single EE azido-bridged dimeric complex 6 manifests antiferromagnetic interaction with J = -2.29(4) cm(-1) (H = -JS(Mn1)S(Mn2)). Magneto-structural correlationship on the EO azido-bridged Mn(II) dimers has been investigated.
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Affiliation(s)
- Zhong-Hai Ni
- Department of Chemistry, Tsinghua University, Beijing 100084, PR China
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Kou HZ, Zhou B, Si SF, Wang RJ. Cyano-Bridged Dimetallic Polynuclear Cu6Cr, Cu6Cr6, Cu2W, and CuW Arrays: Synthesis, Crystal Structure, and Magnetism. Eur J Inorg Chem 2004. [DOI: 10.1002/ejic.200300500] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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