Synthesis and properties of [M II (L 6) 2][ClO 4] 2 (M= Fe, Co and Ni): structures of Co and Ni complexes and spin-state transition by Fe complex (L 6= 2-[3-(2′-pyridyl) …

S Singh, V Mishra, J Mukherjee, N Seethalekshmi…

Index: Sing, Shubha; Mishra, Vibha; Mukherjee, Jhumpa; Seethalekshmi; Mukherjee, Rabindranath Journal of the Chemical Society. Dalton Transactions, 2003 , # 17 p. 3392 - 3397

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Citation Number: 19

Abstract

A new non-planar tridentate ligand 2-[3-(2′-pyridyl) pyrazol-1-ylmethyl] pyridine (L6) and its mononuclear bis-ligand complexes [M (L6) 2][ClO4] 2 [M= Fe (1), Co (2) and Ni (3)] have been synthesized. In the dications of six-co-ordinate complexes of 2 and 3, each L6 is arranged in a meridional mode. Structural analyses reveal that the M–Npyrazole bond length is appreciably shorter than the M–Npyridine bond lengths. Due to the weak field ...