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Oxamido‐bridged N 4 Macrocyclic Complexes Cu II /M II /Cu II (M = Mn, Co): Synthesis, Crystal Structures and Magnetic Properties
Author(s) -
Zhang YanHong,
Deng GuiRu,
Wang QingLun,
Zhang RuiHong,
Yang Fan,
Yang GuangMing,
Liao DaiZheng
Publication year - 2009
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.200801280
Subject(s) - crystallography , chemistry , octahedron , copper , crystal structure , magnetic susceptibility , manganese , ion , molecule , stereochemistry , cobalt , inorganic chemistry , organic chemistry
Two new oxamido‐bridged N 4 macrocyclic complexes [(CuL) 2 Mn(C 2 H 5 OH) 2 ](ClO 4 ) 2 · 2C 2 H 5 OH ( 1 ) and [(CuL) 2 Co‐(C 2 H 5 OH) 2 ](ClO 4 ) 2 · 2C 2 H 5 OH ( 2 ) (H 2 L = 2,3‐dioxo‐5,6:14,15‐di‐benzo‐7,13‐diphenyl‐1,4,8,12‐tetraazacyclo‐pentadeca‐7,13‐diene) have been synthesized and structurally characterized by X‐ray crystallographic investigations. In the two complexes, all copper(II) ions adopt a slightly distorted square‐planar configuration and the central manganese(II) and cobalt(II) ions are set in a distorted octahedral coordination sphere, connected to the other CuL fragments through exo‐cis oxamido bridges. The analyses of the magnetic properties were carried out by means of the theoretical expression of the magnetic susceptibility deduced from the spin Hamiltonian Ĥ = –2 J Ŝ 1 Ŝ 2 , leading to J = –14.58 cm –1 for complex 1 and J = –26.95 cm –1 for complex 2 , respectively.