Tetra-kis(?-4-methyl-benzoato-?O:O')bis-[(isonicotinamide-?N)copper(II)].

ABSTRACT: In the title centrosymmetric binuclear complex, [Cu(2)(C(8)H(7)O(2))(4)(C(6)H(6)N(2)O)(2)], the Cu atoms [Cu?Cu = 2.6375?(6)?Å] are bridged by four 4-methyl-benzoate (PMB) ligands. The four nearest O atoms around each Cu(II) ion form a distorted square-planar arrangement, and the distorted square-pyramidal coordination is completed by the pyridine N atom of the isonicotinamide (INA) ligand. Each Cu(II) ion is displaced by 0.2633?(1)?Å from the plane of the four O atoms, with an average Cu-O distance of 1.974?(2)?Å. The dihedral angles between carboxyl-ate groups and the adjacent benzene rings are 7.88?(19) and 9.68?(10)°, while the benzene rings are oriented at a dihedral angle of 85.90?(9)°. The pyridine ring is oriented at dihedral angles of 8.59?(7) and 83.89?(9)° with respect to the benzene rings. In the crystal structure, inter-molecular N-H?O hydrogen bonds link the mol-ecules into a three-dimensional network. ?-? contacts between the benzene rings and between the pyridine and benzene rings, [centroid-centroid distances = 3.563?(2) and 3.484?(2)?Å, respectively] may further stabilize the crystal structure.

SUBMITTER: Necefoglu H 

PROVIDER: S-EPMC2983750 | biostudies-literature | 2010 Feb

REPOSITORIES: biostudies-literature