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

Abstract

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.