New Heterometallic (CuII and CrIII) Complexes – First Crystal Structure of an Oxalate‐Bridged Ferromagnetically Coupled [CuIICrIIICuII] System
作者： Marijana Jurić , Pavica Planinić , Nevenka Brničević , Dalibor Milić , Dubravka Matković-Čalogović
关键词: Chemistry 、 Molecule 、 Bond length 、 Denticity 、 Octahedral molecular geometry 、 Oxalate 、 Crystallography 、 Crystal structure 、 Bipyridine 、 Octahedron
摘要: Two new heterometallic complexes [[Cu(mu-C_2O_4)(bpy)_2]_2Cr(C_2O_4)]NO_3 center dot H2O (1) and [Cu(bpy)_3]_2[Cr(C_2O_4)_3]NO_3 9H_2O (2) (bpy = 2, 2'-bipyridine) have been synthesized. Their crystal structures were determined magnetic spectroscopic (IR, UV/Vis) characterization accomplished. In 1, the central [Cr(C_2O_4)_3]^3- unit acts as a bridge between two copper(II) ions, each of them having distorted octahedral geometry. The apical positions are occupied by one oxygen atom belonging to bridging oxalate anion [Cu-O2 2.6439(18) Angstrom] nitrogen from bpy ligands [Cu-N1 2.1079(18) Angstrom]. N_3O equatorial environment consists three bpy-nitrogen atoms [Cu-N 1.995 Angstrom (mean value)] second [Cu-O1 2.1168(15) chromium(III) is in slightly four groups [Cr-O 1.988 terminally bonded bidentate group 1.9454(16) Complex 2 mononuclear [Cu(bpy)_3]^2+ cations, anion, (NO_3)^- nine molecules water crystallisation. ions crystallographically independent cations tetragonally coordination six N ligands. ion has [with Cr-O bond lengths ranging 1.964(3) 1.982(3) Analysis properties (1.8-290 K) for 1 showed ferromagnetic exchange interaction Cu^II Cr^III with J +1.20 cm^-1 [using H_(INT) -J(S_(Cu1)S_Cr + S_(Cu2)S_Cr)].
sci-hub.se 参考文章(43)
S. I. Pirumova, E. I. Zhilyaeva, R. N. Lyubovskaya, N. S. Ovanesyan, G. V. Shilov, I. G. Gusakovskaya, Yu. G. Morozov, L. O. Atovmyan, Crystal structure of the molecular ferromagnet NBu 4 [MnCr(C 2 O 4 ) 3 ] (Bu=n-C 4 H 9 ) Jetp Letters. ,vol. 58, pp. 766- 769 ,(1993)
Molecular magnets : recent highlights Springer Vienna. ,(2003) , 10.1007/978-3-7091-6018-3
M Baudler, Georg Brauer, Handbuch der präparativen anorganischen Chemie Published in <b>1975</b> in Stuttgart by Enke. ,(1954)
A. B. P. Lever, Stuart A. Rice, Inorganic Electronic Spectroscopy ,(1968)
Regula Sieber, Silvio Decurtins, Helen Stoeckli-Evans, Claire Wilson, Dima Yufit, Judith A. K. Howard, Silvia C. Capelli, Andreas Hauser, A Thermal Spin Transition in [Co(bpy)3][LiCr(ox)3] (ox=C2O42−; bpy=2,2′‐bipyridine) Chemistry: A European Journal. ,vol. 6, pp. 361- 368 ,(2000) , 10.1002/(SICI)1521-3765(20000117)6:2<361::AID-CHEM361>3.0.CO;2-Y
E. Coronado, J. R. Galán-Mascarós, C. J. Gómez-García, J. M. Martínez-Agudo, Molecule-based magnets formed by bimetallic three-dimensional oxalate networks and chiral tris(bipyridyl) complex cations. The series [ZII(bpy)3][ClO4][MIICrIII(ox)3] (ZII = Ru, Fe, Co, and Ni; MII = Mn, Fe, Co, Ni, Cu, and Zn; ox = oxalate dianion). Inorganic Chemistry. ,vol. 40, pp. 113- 120 ,(2001) , 10.1021/IC0008870
Yan-Tuan Li, Cui-Wei Yan, Hua-Shi Guan, Synthesis and magnetic studies of oxalato-bridged copper(II)-chromium(III)-copper(II) and copper(II)-iron(III)-copper(II) heterotrinuclear complexes Polyhedron. ,vol. 22, pp. 3223- 3230 ,(2003) , 10.1016/J.POLY.2003.07.002
Masaaki Ohba, Hiroko Tamaki, Naohide Matsumoto, Hisashi Okawa, Oxalate-bridged dinuclear Cr(III)-M(II) (M = Cu, Ni, Co, Fe, Mn) complexes: Synthesis, structure, and magnetism Inorganic Chemistry. ,vol. 32, pp. 5385- 5390 ,(1993) , 10.1021/IC00075A069
Yan-Tuan Li, Cui-Wei Yan, Hua-Shi Guan, Synthesis and Magnetism of Ferromagnetically Coupled [Cu3IICrIII] Heterotetranuclear Complexes Bridged by Oxalate Groups Transition Metal Chemistry. ,vol. 29, pp. 537- 542 ,(2004) , 10.1023/B:TMCH.0000037522.41932.50
Marius Andruh, Robert Melanson, Carl V. Stager, Fernande D. Rochon, [Cr(bipy)(C2O4)2]−—a versatile building block for the design of heteropolymetallic systems 2. Syntheses and crystal structures of and (AgCr(bipy)(μ-C2O4)2(H2O)2)2 and magnetic properties of the copper(II) derivative Inorganica Chimica Acta. ,vol. 251, pp. 309- 317 ,(1996) , 10.1016/S0020-1693(96)05284-X