Premium
Syntheses, Crystal Structures, and Properties of Two Novel Trinuclear Copper Complexes Constructed by a Tripodal Heptadentate Ligand Containing Three Imidazolate Groups
Author(s) -
Tong ShiFang,
Yang Hong,
Lao YanNi,
Liu GuoHua,
Wu HuiXia,
Yang ShiPing,
Yu Jie,
Tan Hong,
Li Wei
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.200801420
Subject(s) - crystallography , imidazolate , chemistry , tripodal ligand , square pyramid , ligand (biochemistry) , octahedron , copper , crystal structure , stereochemistry , square pyramidal molecular geometry , inorganic chemistry , biochemistry , receptor , organic chemistry
Two Cu II complexes, {Cu 3 [(mim) 3 htren] 2 }(ClO 4 ) 6 · 2H 2 O ( 1 ) and {Cu 3 [(mim) 3 htren] 2 }(PF 6 ) 6 · 2(CH 3 CN) · 2H 2 O ( 2 ) with the tripodal heptadentate ligand (mim) 3 htren (= tris{2‐[2‐(1‐methyl)imidazolyl]methylaminoethyl}amine) were synthesized and characterized. In complex 1 and 2 , the tripodal ligand (mim) 3 htren coordinates in a very unusual configuration to the copper atoms, which resulted in trinuclear complexes. In the trinuclear cation, {Cu 3 [(mim) 3 htren] 2 } 6+ , the middle atom located on a crystallographic inversion center is coordinated in an elongated octahedral arrangement for 1 and coordinated in square‐planar arrangement for 2 , respectively, and the other two Cu II atoms are coordinated in a distorted square‐pyramid. The results from magnetic data, measured in the temperature range 2.0–300 K, showed that 1 and 2 obeyed the Curie–Weiss law with Weiss constants θ = 0.10 and 0.14 K, respectively, and the same Curie constant C = 1.14 K · mo1 –1 , indicating weak ferromagnetic interactions in the two trinuclearentities.