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López-Banet L, Santana MD, García G, Pérez J, García L, Lezama L, da Silva I. Blocking and bridging ligands direct the structure and magnetic properties of dimers of pentacoordinate nickel(II). Dalton Trans 2015; 44:6839-47. [PMID: 25765477 DOI: 10.1039/c5dt00181a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dinuclear pentacoordinate nickel(ii) complexes of the formula [(NiTp*)2(μ-L)] (Tp* = hydrotris(3,5-dimethylpyrazolyl)borate; L = oxalate (); oxamate (); oxamidate (); OC(4-Cl-C6H4N)C(4-Cl-C6H4N)O ()) and {[Ni(N3-mc)]2(μ-L)}(PF6)2 (N3-mc = 2,4,4-trimethyl-1,5,9-triazacyclododec-1-ene; L = oxalate (); oxamate ()) have been synthesized and spectroscopically characterized (IR, (1)H NMR). X-ray structures of show nickel(ii) in a square pyramidal geometry and different supramolecular interactions. Magnetic measurements for show strong antiferromagnetic interactions across the bridging ligand [: J = -36.8 cm(-1), g = 2.16; : J = -43.6 cm(-1), g = 2.12; : J = -51.1 cm(-1), g = 2.12; : J = -39.7 cm(-1), g = 2.18; : J = -35.4 cm(-1), g = 2.20; : J = -44.3 cm(-1), g = 2.18]. Magneto-structural correlations between the magnitude of the magnetic coupling and the different blocking ligands, the different bridging ligands, the distortion of the coordination environment of Ni(ii) and the planarity between the bridging ligand and the basal plane of the Ni(ii) environment have been established for all complexes.
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Affiliation(s)
- Luisa López-Banet
- Departamento de Química Inorgánica and Regional Campus of International Excellence (Campus Mare Nostrum), Universidad de Murcia, E-30071 Murcia, Spain.
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Xu LH, Wang HX, Zhu LN. A new oxamido-bridged dinuclear copper(II) complex with large antiferromagnetic exchange interactions. J COORD CHEM 2012. [DOI: 10.1080/00958972.2012.666534] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Li-Hua Xu
- a Department of Chemistry , Tianjin University , Tianjin 300072 , China
| | - Hai-Xian Wang
- a Department of Chemistry , Tianjin University , Tianjin 300072 , China
| | - Li-Na Zhu
- a Department of Chemistry , Tianjin University , Tianjin 300072 , China
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Lou WJ, Zang SQ, Wang QL, Tao RJ. Synthesis, structures and magnetic properties of four new oxamidato-bridged heterobimetallic complexes. Inorganica Chim Acta 2009. [DOI: 10.1016/j.ica.2009.01.043] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Lou W, Zang S, Zhang W, Wang Q, Tao R. Synthesis, crystal structure and magnetic properties of a new 1-D oxamidate-bridged Cu(II)-Mn(II) polymer. J COORD CHEM 2008. [DOI: 10.1080/00958970802105052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Weijiang Lou
- a Institute of Molecular & Crystal Engineering, Chemistry and Chemical Engineering College, Henan University , Kaifeng, 475001, P.R. China
| | - Shuangquan Zang
- b Department of Chemistry and Center of Novel Functional Molecules , The Chinese University of Hong Kong , Shatin, New Territories, Hong Kong, P.R. China
| | - Wu Zhang
- a Institute of Molecular & Crystal Engineering, Chemistry and Chemical Engineering College, Henan University , Kaifeng, 475001, P.R. China
| | - Qinglun Wang
- c Department of Chemistry , Nankai University , Tianjin, 300071, P.R. China
| | - Ruojie Tao
- a Institute of Molecular & Crystal Engineering, Chemistry and Chemical Engineering College, Henan University , Kaifeng, 475001, P.R. China
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Arizaga L, González R, Chiozzone R, Kremer C, Cerdá MF, Armentano D, Munno GD, Lloret F, Faus J. Synthesis, crystal structure, electrochemical and magnetic properties of (NBu4)[ReCl5(L)] with L=pyrimidine and pyridazine. Polyhedron 2008. [DOI: 10.1016/j.poly.2007.10.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Santana MD, García G, Julve M, Lloret F, Pérez J, Liu M, Sanz F, Cano J, López G. Oxamidate-Bridged Dinuclear Five-Coordinate Nickel(II) Complexes: A Magneto−Structural Study. Inorg Chem 2004; 43:2132-40. [PMID: 15018537 DOI: 10.1021/ic030050f] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The preparation, spectroscopic characterization, and magnetic study of three new oxamidate-bridged nickel(II) dinuclear complexes of formulas ([Ni(Me3[12]aneN3)]2(mu-oa))(PF6)2 (1), ([Ni(Me3[12]aneN3)]2(mu-dmoa))(PF6)2 (2), and ([Ni(Me3[12]aneN3)]2(mu-dpoa))(PF6)2 (3) (Me3[12]aneN3 = 2,4,4-trimethyl-1,5,9-triazacyclododec-1-ene, oa = oxamidate, dmoa = N,N'-dimethyloxamidate, and dpoa = N,N'-diphenyloxamidate) are reported. The crystal structures of two of them (1 and 3) have been determined. 1 and 3 crystallize in the monoclinic system, space group P2(1)/c, with Z = 2 and a = 7.901(4) A, b = 13.597(6) A, c = 17.565(10) A, and beta = 96.46(4) degrees for 1 and a = 13.854(3) A, b = 17.469(4) A, c = 12.543(3) A, and beta = 116.22(3) degrees for 3. The structures of 1 and 3 consist of dinuclear ([Ni(Me3[12]aneN3)]2(mu-oa))2+ and ([Ni(Me3[12]aneN3)]2(mu-dpoa))2+ cations and hexafluorophosphate anions. Each nickel in 1-3 is five-coordinate, and the substitution of the hydrogen atom of the amidate nitrogen of 1 by a methyl (2) or a phenyl (3) group causes a significant modification of the stereochemistry of the nickel(II) ions from square pyramidal toward trigonal bipyramidal (tau values of 0.12 and 0.48 for 1 and 3, respectively). The NOESY spectrum of 3 has allowed us to achieve the assignment of the phenyl protons of the N,N'-diphenyloxamidate. The value of magnetic coupling between the two nickel(II) ions across the oxamidate bridge [J = -57.0 (oa, 1), -38.0 (dmoa, 2) and -30.5 cm(-1) (dpoa, 3)] is very sensitive to this stereochemical change, and its variation is explained on the basis of orbital considerations. DFT type calculations have been performed to analyze and substantiate the trend of the magnetic coupling in 1-3.
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Affiliation(s)
- M Dolores Santana
- Departamento de Química Inorgánica, Universidad de Murcia, 30071 Murcia, Spain
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Saravanakumar D, Sengottuvelan N, Narayanan V, Kandaswamy M, Chinnakali K, Senthilkumar G, Fun H. Synthesis, Structural, Magnetic and Electrochemical Studies of Antiferromagnetically Coupled Symmetric Oxamidate‐Bridged Binuclear Copper(
II
) Complexes. Eur J Inorg Chem 2004. [DOI: 10.1002/ejic.200300524] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Duraisamy Saravanakumar
- Department of Inorganic Chemistry, School of Chemical Sciences, University of Madras, Guindy Campus, Chennai 600025, India, Fax: (internat.) +91‐44/2230‐0488 or ‐/2235‐2494
| | - Nallathambi Sengottuvelan
- Department of Inorganic Chemistry, School of Chemical Sciences, University of Madras, Guindy Campus, Chennai 600025, India, Fax: (internat.) +91‐44/2230‐0488 or ‐/2235‐2494
| | - Vengidusamy Narayanan
- Department of Inorganic Chemistry, School of Chemical Sciences, University of Madras, Guindy Campus, Chennai 600025, India, Fax: (internat.) +91‐44/2230‐0488 or ‐/2235‐2494
| | - Muthusamy Kandaswamy
- Department of Inorganic Chemistry, School of Chemical Sciences, University of Madras, Guindy Campus, Chennai 600025, India, Fax: (internat.) +91‐44/2230‐0488 or ‐/2235‐2494
| | | | | | - Hoong Kun Fun
- X‐ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang Malaysia
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Zang SQ, Tao RJ, Wang QL, Hu NH, Cheng YX, Niu JY, Liao DZ. Synthesis, crystal structure, and magnetic properties of ([Cu(oxbe)]Mn(H(2)O)[Cu(oxbe)(DMF)])(n).nDMF.nH(2)O: From dissymmetrical mononuclear entities to a 3D heterometallic supramolecular coordination polymer. Inorg Chem 2003; 42:761-6. [PMID: 12562190 DOI: 10.1021/ic020491j] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Self-assembly of the building block [Cu(oxbe)](-) with Mn(II) led to a novel coordination polymer ([Cu(oxbe)]Mn(H(2)O)[Cu(oxbe)(DMF)])n).nDMF.nH(2)O, where H(3)oxbe is a new dissymmetrical ligand N-benzoato-N'-(2-aminoethyl)oxamido and DMF = dimethylformamide. The crystal forms in the triclinic system, space group Ponemacr;, with a = 9.260(4) A, b = 12.833(5) A, c = 15.274(6) A, alpha = 76.18(3) degrees, beta = 82.7(3) degrees, gamma = 82.31(3) degrees, and Z = 2. The crystal structure of the title complex reveals that the two-dimensional bimetallic layers are constructed of Cu(II)Mn(II)Cu(II) chains linked together by carboxylate bridge and hydrogen bonds help to produce a novel three-dimensional channel-like structure. The magnetic susceptibility measurements (5-300 K) were analyzed by means of the Hamiltonian H = -2JS(Mn)(S(Cu1) + S(Cu2)), leading to J = -17.4 cm(-1).
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Affiliation(s)
- Shuang-Quan Zang
- Chemistry and Chemical Engineering College of Henan University, Kaifeng 475001, P. R. China
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Tercero J, Diaz C, Ribas J, Mahía J, Maestro MA. New oxamato-bridged trinuclear Cu(II)-Cu(II)-Cu(II) complexes with hydrogen-bond supramolecular structures: synthesis and magneto-structural studies. Inorg Chem 2002; 41:5373-81. [PMID: 12377030 DOI: 10.1021/ic011081i] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Three oxamato-bridged copper(II) complexes of formula [(Cu(H(2)O)(tmen)Cu(tmen))(mu-Cu(H(2)O)(Me(2)pba))](n)((PF(6))(2))(n).2nH(2)O (1), [(Cu(H(2)O)(tmen)Cu(NCS)(tmen))(mu-Cu(H(2)O)(Me(2)pba))](2)(ClO(4))(2).4H(2)O (2), and [(Cu(H(2)O)(tmen)Cu(NCS)(tmen))(mu-Cu(H(2)O)(Me(2)pba))](2)(PF(6))(2).4H(2)O (3), where Me(2)pba = 2,2-dimethyl-1,3-propylenebis(oxamato) and tmen = N,N,N',N'-tetramethylethylenediamine, have been synthesized and characterized. Their crystal structures were solved. Complex 1 crystallizes in the monoclinic system, space group P2(1), with a = 15.8364(3) A, b =8.4592(2) A, c = 15.952 A, beta = 101.9070(10) degrees, and Z = 2. Complex 2 crystallizes in the monoclinic system, space group P2(1)/c, with a = 6.69530(10) A, b = 18.2441(3) A, c = 31.6127(5) A, beta = 90.1230(10) degrees, and Z = 4. Complex 3 crystallizes in the monoclinic system, space group P2(1)/c, with a = 6.68970(10) A, b = 18.150 A, c = 32.1949(4) A, beta = 90.0820(10) degrees, and Z = 4. The three complexes have a central core in common: a trinuclear Cu(II) complex with the two terminal Cu(II) ions blocked by N,N,N',N'-tetramethylethylenediamine. The structure of complex 1 consists of trinuclear cationic entities connected by hydrogen bonds to produce a supramolecular one-dimensional array. The structure of complexes 2 and 3 consist of trinuclear cationic entities linked by pairs by hydrogen bonds between the water molecule of the central Cu(II) and one oxygen atom of the oxamato ligand of the neighboring entity, forming a hexanuclear complex. The magnetic properties of the three complexes were studied by susceptibility vs temperature measurement. For complexes 1-3 the fit was made by the irreducible tensor operator (ITO). The values obtained were J(1) = -386.48 cm(-1) and J(2) = 1.94 cm(-1) for 1, J(1) = -125.77 cm(-1) and J(2) = 0.85 cm(-1) for 2, and J(1) = -135.50 cm(-1) and J(2) = 0.94 cm(-1) for 3. In complex 1, the coordination polyhedron of the terminal Cu(II) atoms can be considered as square pyramidal; the apical positions are filled by the oxygen atom from a water molecule in the former and a F atom of the hexafluorophosphate anion in the latter showing a quasi-planar [Cu(CuMe(2)pba)Cu] network. For complexes 2 and 3, the square pyramidal environment of the terminal Cu(II) ions was strongly modified. To our knowledge, this is the first time that the longest distance (apical) in complexes with oxamato derivatives and bidentate amines as blocking ligands has been reported in one of the oxamato arms. The great difference in J(1) values between 1 and the other two complexes is interpreted as an orbital reversal of the magnetic orbitals of the terminal Cu(II) ions in 2 and 3.
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Affiliation(s)
- Javier Tercero
- Departament de Química Inorgànica, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
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Synthesis, X-ray structure, spectroscopy and magnetism of polymeric bis(μ-dicyanamido)(μ-pyrimidine)copper(II) monoacetonitrile; a 3D compound with bridging dicyanamide anions in two dimensions. Inorganica Chim Acta 2001. [DOI: 10.1016/s0020-1693(00)00374-1] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Chen ZN, Zhang HX, Yu KB, Kang BS, Cai H, Su CY, Wang TW, Lu ZL. 3D Extended Supramolecular Structures via H-Bonded Linkages of 2D Sheetlike or 1D Zigzag Coordination Polymers. Inorg Chem 1998; 37:4775-4781. [PMID: 11670640 DOI: 10.1021/ic980116k] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two 3D supramolecular complexes [Cu(2)(trans-oxpn)(phth)](n)().2nH(2)O, 1, and [Cu(2)(trans-oxpn)(&mgr;-OH)(&mgr;-H(2)O)](n)()Br(n)().2nH(2)O, 2 [H(2)oxpn = N,N'-bis(3-aminopropyl)oxamide, phth = phthalate], were synthesized and characterized by single-crystal X-ray crystallography, thermal analyses, and magnetic measurements. 1 crystallizes in the monoclinic space group P2(1)/c with a = 8.578(2) Å, b = 15.596(2) Å, c = 15.657(2) Å, beta = 101.29(2) degrees, Z = 4; 2 crystallizes in the trigonal space group R&thremacr;c with a = 15.266(2) Å, b = 15.266(2) Å, c = 34.953(5) Å, and Z= 18. The neutral 2D sheetlike coordination polymer [Cu(2)(trans-oxpn)(phth)](n)() in 1 contains alternate trans-oxamidate and phthalate bridges and then is joined together by H(2)O molecules via the hydrogen bond linkage Cu(oxpn).H(2)O.H(2)O.(oxpn)Cu to produce a 3D supramolecular structure. The cationic chains [Cu(2)(trans-oxpn)(&mgr;-OH)(&mgr;-H(2)O)](n)()(n)()(+) in 2 contain alternate trans-oxamidate, &mgr;-OH, and &mgr;-H(2)O bridges and are arranged in three directions, intersecting with one another to yield an extended network via the interchain hydrogen bonds formed by metal-coordinated OH(-) with the linkages Cu(oxpn)-OH.OH-Cu(oxpn). Magnetic calculations showed the presence of antiferromagnetic exchange interactions for both complexes. The 2D magnetic coupling system of 1 was simplified into interacting dimers Cu(trans-oxpn)Cu, with the coupling via phth as an interdimer interaction and the data were interpreted with a modified Bleaney-Bowers equation leading to J = -456.7 cm(-)(1) and theta = 22.0 K. 2 was analyzed qualitatively by an alternating chain model taking into account the interchain interaction in a molecular model with J(1) = -309.6 cm(-)(1), J(2) = -63.5 cm(-)(1), and theta = -12.9 K, where J(1) and J(2) denote the coupling constants of the bridges oxamidate and &mgr;-OH, respectively.
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Affiliation(s)
- Zhong-Ning Chen
- School of Chemistry and Chemical Engineering, Zhongshan University, Guangzhou, Guangdong 510275, China, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China, and State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, Jiangsu 210093, China
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Chen ZN, Zhang HX, Su CY, Zhou ZY, Zheng KC, Kang BS. Two-Dimensional Sheets of Rugged Hexagonal Grids of [Cu(6)(trans-oxen)(3)(&mgr;(3)-OH)(2)(H(2)O)(2)](n)()(4)(n)()(+) with Copper(II) Bridged by trans-Oxamidate (oxen) and &mgr;(3)-OH(-) Groups. Inorg Chem 1998; 37:3877-3880. [PMID: 11670495 DOI: 10.1021/ic9714246] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhong-Ning Chen
- School of Chemistry and Chemical Engineering, Zhongshan University, Guangzhou, Guangdong 510275, China, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China, and State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing, Jiangsu 210093, China
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Zhong-Ning Chen, Zhang HX, Yu KB, Kang BS. Extended Network via Axial Cu-Br Linkages of Zig-zag Coordination Chains of Copper(II) Ions Bridged Alternately by trans-Oxamidate and End-on Azide Groups. CHEM LETT 1998. [DOI: 10.1246/cl.1998.275] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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A trinuclear nickel(II) complex with alternating square-planar and octahedral geometries. Synthesis, crystal structure and magnetic properties of [Ni3(oxen)2(en)][ClO4]2. Polyhedron 1998. [DOI: 10.1016/s0277-5387(97)00392-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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