Supramolecular assemblies of new 2-D complexes: Syntheses, crystal structures, spectroscopic and magnetic properties of {[MnAu 2(CN) 4(NITpPy) 2(H 2O) 2]} n and {[Co(N(CN) 2) 2(NITpPy) 2(H 2O) 2]} n

• Published in: Inorganica Chimica Acta 2006-01, Vol.359 (2), p.533-540
• Main Authors: Zhou, Hui-Bo, Wang, Shu-Ping, Liu, Zhan-Quan, Liao, Dai-Zheng, Jiang, Zong-Hui, Yan, Shi-Ping, Cheng, Peng
• Format: Article
• Language: English
• Subjects: Antiferromagnetic; Aurophilicity; Complexes; Hydrogen bonding interactions; Octahedral
• ISSN: 0020-1693; 1873-3255
• DOI: 10.1016/j.ica.2005.08.014

Two new complexes containing 3d metal, pyridyl-nitronylnitroxides, and anionic bridging ligands, which show the fascinating structures with magnetic properties, have been prepared. The structure of the complexes illustrates that aurophilicity or hydrogen bonding interactions increase dimensionality, generating a 2-D system. The magnetic properties for 1 and 2 have been investigated. Two new complexes, {[MnAu 2(CN) 4(NITpPy) 2(H 2O) 2]} n ( 1) and {[Co(N(CN) 2) 2(NITpPy) 2(H 2O) 2]} n ( 2), have been synthesized and characterized. The single-crystal X-ray analysis for the complexes 1 and 2 demonstrates that each M(II) (M = Mn or Co) ion assumes a distorted octahedral MN 4O 2 coordination polyhedron. Four nitrogen atoms come from the cyanide groups and the pyridyl rings in a common plane, and two oxygen atoms come from the H 2O molecules in trans-positions. The structures of complexes 1 and 2 illustrate that aurophilicity and/or hydrogen bonding interactions play important roles in increasing dimensionality. Magnetic investigations on complexes 1 and 2 show the presence of weak antiferromagnetic interactions.