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Marinho MV, Simões TR, Ribeiro MA, et al. A two-dimensional oxamate- and oxalate-bridged Cu(II)Mn(II) motif: crystal structure and magnetic properties of (Bu4N)2[Mn2{Cu(opba)}2ox]. Inorg Chem. 2013;52(15):8812-9doi: 10.1021/ic401038c.
Marinho, M. V., Simões, T. R., Ribeiro, M. A., Pereira, C. L., Machado, F. C., Pinheiro, C. B., Stumpf, H. O., Cano, J., Lloret, F., & Julve, M. (2013). A two-dimensional oxamate- and oxalate-bridged Cu(II)Mn(II) motif: crystal structure and magnetic properties of (Bu4N)2[Mn2{Cu(opba)}2ox]. Inorganic chemistry, 52(15), 8812-9. https://doi.org/10.1021/ic401038c
Marinho, Maria V, et al. "A two-dimensional oxamate- and oxalate-bridged Cu(II)Mn(II) motif: crystal structure and magnetic properties of (Bu4N)2[Mn2{Cu(opba)}2ox]." Inorganic chemistry vol. 52,15 (2013): 8812-9. doi: https://doi.org/10.1021/ic401038c
Marinho MV, Simões TR, Ribeiro MA, Pereira CL, Machado FC, Pinheiro CB, Stumpf HO, Cano J, Lloret F, Julve M. A two-dimensional oxamate- and oxalate-bridged Cu(II)Mn(II) motif: crystal structure and magnetic properties of (Bu4N)2[Mn2{Cu(opba)}2ox]. Inorg Chem. 2013 Aug 05;52(15):8812-9. doi: 10.1021/ic401038c. Epub 2013 Jul 15. PMID: 23855768.
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Inorg Chem. 2013 Aug 05;52(15):8812-9. doi: 10.1021/ic401038c. Epub 2013 Jul 15.

A two-dimensional oxamate- and oxalate-bridged Cu(II)Mn(II) motif: crystal structure and magnetic properties of (Bu4N)2[Mn2{Cu(opba)}2ox].

Inorganic chemistry

Maria V Marinho, Tatiana R G Simões, Marcos A Ribeiro, Cynthia L M Pereira, Flávia C Machado, Carlos B Pinheiro, Humberto O Stumpf, Joan Cano, Francesc Lloret, Miguel Julve

Affiliations

  1. Departament de Química Inorgànica/Instituto de Ciencia Molecular, Facultat de Química de la Universitat de València, 46980-Paterna (València), Spain.

PMID: 23855768 DOI: 10.1021/ic401038c

Abstract

A new compound of formula (Bu4N)2[Mn2{Cu(opba)}2ox] (1) [Bu4N(+) = tetra-n-butylammonium cation, H4opba = 1,2-phenylenebis(oxamic acid), and H2ox = oxalic acid] has been synthesized and magneto-structurally investigated. The reaction of manganese(II) acetate, [Cu(opba)](2-), and ox(2-) in dimethyl sulfoxide yielded single crystals of 1. The structure of 1 consists of heterobimetallic oxamato-bridged Cu(II)Mn(II) chains which are connected through bis-bidentate oxalate coordinated to the manganese(II) ions to afford anionic heterobimetallic layers of 6(3)-hcb net topology. The layers are interleaved by n-Bu4N(+) counterions. Each copper(II) ion in 1 is four-coordinate in a square planar environment defined by two amidate-nitrogen and two carboxylate-oxygen atoms from the two oxamate groups of the obpa ligand. The manganese(II) ion is six-coordinate in a somewhat distorted octahedral surrounding that is built by two oxalate-oxygen and four carbonyl-oxygen atoms from two [Cu(opba)](2-) units. The magnetic properties of 1 in the temperature range 1.9-300 K correspond to those expected for the coexistence of intralayer antiferromagnetic interactions of the type copper(II)-manganese(II) across oxamato and manganese(II)-manganese(II) through oxalato bridges plus a weak spin canting in the very low temperature domain. Simulation of the magnetic data through quantum Monte Carlo methodology reveals the magnitude of the intralayer magnetic interactions [J(CuMn) = -32.5(3) cm(-1), and J(MnMn) = -2.7(3) cm(-1)], their values being within the range of those previously observed in lower nuclearity systems.

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