Premium
First Crystal Structure of a ( μ ‐Oxamidato)tricopper(II)metal(II)‐Type Tetranuclear Complex: Synthesis, Crystal Structure, and Magnetism of a Copper(II)manganese(II) Complex ([Cu II 3 Mn II ( μ ‐L) 3 ](N 3 ) 2 ⋅EtOH) Incorporating a Macrocyclic Oxamide Ligand L (Macrocyclic Oxamide=1,4,8,11‐Tetraazacyclotetradecane‐2,3‐dione)
Author(s) -
Tang JinKui,
Wang QingLun,
Gao EnQing,
Chen JiuTong,
Liao DaiZheng,
Jiang ZongHui,
Yan ShiPing,
Cheng Peng
Publication year - 2002
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/1522-2675(200201)85:1<175::aid-hlca175>3.0.co;2-1
Subject(s) - chemistry , oxamide , manganese , crystal structure , crystallography , copper , magnetism , metal , magnetic susceptibility , stereochemistry , macrocyclic ligand , condensed matter physics , organic chemistry , physics
A novel oxamidato‐bridged Cu II 3 Mn II tetranuclear complex incorporating a macrocyclic oxamide (macrocyclic oxamide L=1,4,8,11‐tetraazacyclotetradecane‐2,3‐dione) of formula [Cu II 3 Mn II ( μ ‐L) 3 ](N 3 ) 2 ⋅ EtOH was prepared and spectroscopically, structurally, and magnetically characterized. This complex represents the first structurally characterized [Cu II 3 M II ( μ ‐oxamidato) 3 ]‐type tetranuclear complex. The structure consists of tetranuclear units in which the central Mn II atom is located on a twofold axis and linked to the each external Cu II atom ion via the ‘ exo '‐ cis ‐arranged O‐atoms of the macrocyclic oxamidato ligands. The temperature dependence of the magnetic susceptibility for the complex was analyzed by means of the Hamiltonian Ĥ =−2 JŜ Mn ( Ŝ Cu1 + Ŝ Cu2 + Ŝ Cu3 ), leading to J =−16.3 cm −1 .