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Synthesis, Structures and Magnetic Properties of Two Binuclear Cobalt(II) Complexes Bridged by Bis( p ‐nitrophenyl) Phosphate or Diphenylphosphinate Ion
Author(s) -
Tian JinLei,
Gu Wen,
Yan ShiPing,
Liao DaiZheng,
Jiang ZongHui
Publication year - 2008
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200800130
Subject(s) - chemistry , intramolecular force , cobalt , crystallography , trigonal bipyramidal molecular geometry , octahedron , ion , antiferromagnetism , crystal structure , atom (system on chip) , phosphate , coordination sphere , magnetic susceptibility , stereochemistry , inorganic chemistry , organic chemistry , physics , computer science , embedded system , condensed matter physics
Two new binuclear cobalt(II) complexes, [Co 2 L 1 ( μ 2 ‐DPP)] 2+ ( 1 ) (H L 1 = N , N , N ′, N ′‐ tetrakis (2‐benzimidazolylmethyl)‐2‐hydroxyl ‐1,3‐diaminopropane; DPP = diphenylphosphinate) and [Co 2 L 2 ( μ 2 ‐BNPP) 2 ] + ( 2 ) (H L 2 = 2,6‐bis‐[N,N‐di(2‐ pyridylmethyl)aminomethyl]‐4‐methylphenol, BNPP = bis(4‐nitrophenyl)phosphate) have been synthesized and their crystal structures and magnetic properties are shown. In 1 , each Co II atom has a distorted trigonal bipyramidal coordination sphere with a N 3 O 2 donor set and the central two Co II atoms are bridged by one alkoxo‐O atom and one μ 2 ‐DPP ion with the Co1‐Co2 separation of 3.542Å. In 2 , each Co II atom has a pseudo octahedral environment with a N 3 O 3 donor set and the central two Co II atoms are bridged by a phenolic oxygen atom of L 2 and two μ 2 ‐BNPP ions with the Co1‐Co2 separation of 3.667Å. Susceptibility data of 1 and 2 indicate intramolecular antiferromagnetic coupling of the high‐spin Co II atoms.