TY - JOUR
T1 - Ferromagnetic exchange coupling in a new bis(μ-chloro)-bridged copper(II) Schiff base complex
T2 - Synthesis, structure, magnetic properties and catalytic oxidation of cycloalkanes
AU - Thakurta, Santarupa
AU - Roy, Partha
AU - Rosair, Georgina
AU - Gómez-García, Carlos J.
AU - Garribba, Eugenio
AU - Mitra, Samiran
PY - 2009/3/12
Y1 - 2009/3/12
N2 - A new (µ-chloro)-bridged complex [Cu(HL)Cl]2 · H2O (1) with the Schiff base ligand H2L, [2-((E)-(2-hydroxyethylimino)methyl)-4-bromophenol], has been synthesized and characterized by elemental analysis, IR, UV-Vis and EPR spectroscopic studies. X-ray diffraction studies show that 1 is a binuclear CuII complex with a pair of chlorine atoms bridging the copper atoms in a central Cu2Cl2 core. Each copper atom in 1 adopts a distorted square-pyramidal geometry with the imine nitrogen atom, alkoxy and phenoxy oxygen atoms from the Schiff base ligand and a bridging chlorine atom constructing the basal plane, while the apical position of the pyramid is occupied by the other bridging chlorine atom. Variable temperature susceptibility measurements show that complex 1 presents the highest ferromagnetic coupling [J = +43.2(5) cm-1] reported till date in any doubly chloro-bridged CuII dimer, and a weak interdimer antiferromagnetic coupling [J' = -0.276(8) cm-1]. The complex also exhibits high catalytic activity towards the oxidation of hydrocarbons using H2O2 as terminal oxidant. © 2009 Elsevier Ltd. All rights reserved.
AB - A new (µ-chloro)-bridged complex [Cu(HL)Cl]2 · H2O (1) with the Schiff base ligand H2L, [2-((E)-(2-hydroxyethylimino)methyl)-4-bromophenol], has been synthesized and characterized by elemental analysis, IR, UV-Vis and EPR spectroscopic studies. X-ray diffraction studies show that 1 is a binuclear CuII complex with a pair of chlorine atoms bridging the copper atoms in a central Cu2Cl2 core. Each copper atom in 1 adopts a distorted square-pyramidal geometry with the imine nitrogen atom, alkoxy and phenoxy oxygen atoms from the Schiff base ligand and a bridging chlorine atom constructing the basal plane, while the apical position of the pyramid is occupied by the other bridging chlorine atom. Variable temperature susceptibility measurements show that complex 1 presents the highest ferromagnetic coupling [J = +43.2(5) cm-1] reported till date in any doubly chloro-bridged CuII dimer, and a weak interdimer antiferromagnetic coupling [J' = -0.276(8) cm-1]. The complex also exhibits high catalytic activity towards the oxidation of hydrocarbons using H2O2 as terminal oxidant. © 2009 Elsevier Ltd. All rights reserved.
KW - Bis(μ-chloro)-bridge
KW - Catalytic activity
KW - Ferromagnetic
KW - Schiff base
UR - http://www.scopus.com/inward/record.url?scp=60349087758&partnerID=8YFLogxK
U2 - 10.1016/j.poly.2008.12.016
DO - 10.1016/j.poly.2008.12.016
M3 - Article
SN - 0277-5387
VL - 28
SP - 695
EP - 702
JO - Polyhedron
JF - Polyhedron
IS - 4
ER -