TY - JOUR
T1 - An antiferromagnetically coupled hexanuclear copper(II) schiff base complex containing phenoxo and dicyanamido bridges: structural aspects and magnetic properties
AU - Talukder, Pritha
AU - Shit, Shyamapada
AU - Sasmal, Ashok
AU - Batten, Stuart
AU - Moubaraki, Boujemaa
AU - Murray, Keith
AU - Mitra, Samiran
PY - 2011
Y1 - 2011
N2 - A novel hexanuclear complex [ (CuL)2Cu 2(l-dca)2](ClO4)2 2L0(1) (whereH2L = (OH)C6H4C(CH3)@N(CH2)3-
N@C(CH3)C6H4(OH) or N,N0-bis(2-hydroxyacetophenone) propylenediimine and dca = N(CN)2
and L0 = 2-
hydroxyacetophenone) has been synthesized and characterized by elemental analysis, UVa??Vis, FT-IR spectroscopic
and electrochemical methods. Single crystal X-ray structural characterization reveals a centrosymmetric
nature of the complex unit, where the metal centers adopt distorted square-planar and
distorted octahedral geometries. Structural analysis also reveals l2-phenoxo bridges between terminal
and the central copper(II) centers of the asymmetric [(CuL)2Cu(dca)] unit, the latter being interconnected
to its symmetry related counterpart by double l1,5-dca bridges, leading to the hexanuclear complex ion
[ (CuL)2Cu 2(l-dca)2]2+. Low temperature susceptibility measurements of 1 revealed the presence of strong
antiferromagnetic coupling (2J = 407 cm 1) between the copper(II) centers.
AB - A novel hexanuclear complex [ (CuL)2Cu 2(l-dca)2](ClO4)2 2L0(1) (whereH2L = (OH)C6H4C(CH3)@N(CH2)3-
N@C(CH3)C6H4(OH) or N,N0-bis(2-hydroxyacetophenone) propylenediimine and dca = N(CN)2
and L0 = 2-
hydroxyacetophenone) has been synthesized and characterized by elemental analysis, UVa??Vis, FT-IR spectroscopic
and electrochemical methods. Single crystal X-ray structural characterization reveals a centrosymmetric
nature of the complex unit, where the metal centers adopt distorted square-planar and
distorted octahedral geometries. Structural analysis also reveals l2-phenoxo bridges between terminal
and the central copper(II) centers of the asymmetric [(CuL)2Cu(dca)] unit, the latter being interconnected
to its symmetry related counterpart by double l1,5-dca bridges, leading to the hexanuclear complex ion
[ (CuL)2Cu 2(l-dca)2]2+. Low temperature susceptibility measurements of 1 revealed the presence of strong
antiferromagnetic coupling (2J = 407 cm 1) between the copper(II) centers.
UR - http://www.sciencedirect.com/science/article/pii/S0277538711002555
U2 - 10.1016/j.poly.2011.03.049
DO - 10.1016/j.poly.2011.03.049
M3 - Article
SN - 0277-5387
VL - 30
SP - 1767
EP - 1773
JO - Polyhedron
JF - Polyhedron
ER -