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Azido, Cyanato, and Thiocyanato Coordination Induced Distortions in Pentacoordinated [Co II A(bip)] 2 (A = NCS – , N 3 – , or NCO – ) Complexes
Author(s) -
Sarkar Mrinal,
Clérac Rodolphe,
Mathonière Corine,
Hearns Nigel G. R.,
Bertolasi Valerio,
Ray Debashis
Publication year - 2009
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200900577
Subject(s) - chemistry , crystallography , antiferromagnetism , ligand (biochemistry) , dimer , ion , yield (engineering) , stereochemistry , magnetic susceptibility , metal , coordination complex , biochemistry , physics , receptor , materials science , organic chemistry , metallurgy , condensed matter physics
A new family of distorted pentacoordinate [Co 2 ] complexes was prepared and structurally characterized. In [Co II A(bip)] 2 · S ( 1 – 3 ) [A = NCS – , N 3 – , NCO – ; S = dmf, MeOH, dcm; Hbip = 2,6‐bis(phenylmethyliminomethyl)‐4‐methylphenol], the nonbonded Co ··· Co separations are in the 3.243 to 3.254 Å range, and the pseudohalide‐coordinated Co II ions are asymmetrically doubly bridged by the phenolate oxygen atoms of the ligand. The complementary basal – apical ( b – a ) and apical – basal ( a – b ) coordination modes of the phenolate bridges of bip – offer one O and two N donors for metal‐ion coordination. In the three dinuclear complexes, the h.s . Co II ions are coupled antiferromagnetically to yield a singlet ground state. The solid‐state variable‐temperature magnetic susceptibility measurement data on the complexes were fitted to an isotropic Heisenberg dimer model that allowed estimation of the antiferromagnetic interactions for 1 – 3 . (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)