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Synthesis, Crystal Structure and Magnetic Properties of a New cis ‐Heterotrinuclear [CuL‐Mn‐CuL] Complex
Author(s) -
LI Fuan,
LIU Hongling,
LI Guopeng,
TAO Ruojie
Publication year - 2009
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200990248
Subject(s) - chemistry , antiferromagnetism , crystallography , octahedron , molecule , crystal structure , schiff base , ferromagnetism , copper , octahedral molecular geometry , magnetic susceptibility , stereochemistry , condensed matter physics , organic chemistry , physics
A new dissymmetrical Schiff base copper precursor complex KCuL and a cis ‐heterotrinuclear complex with the chemical formula [(CuL) 2 Mn(H 2 O) 2 ]·CH 3 OH, have been synthesized and characterized by means of elemental analysis and IR, where H 3 L= ( E )‐ N ‐[2‐(5‐chloro‐2‐hydroxybenzylideneamino)ethyl]‐2‐hydroxybenzamide. The crystal structure of the cis ‐heterotrinuclear complex was determined by X‐ray analysis. Each cell unit of the complex contains one neutral cis ‐heterotrinuclear molecule and two disordered methanol molecules. The central Mn 2+ ion is located at the site of O 6 with a distorted octahedral geometry, and two coordination anions [CuL] − are aligned in cis ‐configuration. The magnetic properties indicate that the trinuclear complex not only has antiferromagnetic interactions in the internal trinuclear molecule but also has weak ferromagnetic interactions between the trinuclear units. The best‐fit parameters are J = −12.1 cm −1 , g =2.20 and zj′ =1.37 cm −1 .