Diaqua-bis-(2-hy-droxy-benzoato-?O (1))bis-(nicotinamide-?N (1))cadmium-diaqua-bis-(2-hy-droxy-benzoato-?(2) O (1),O (1'))(nico-tin-amide-?N)cadmium-water (1/2/4).

ABSTRACT: The crystal structure of the title compound, [Cd(C7H5O3)2(C6H6NO)2(H2O)2]·2[Cd(C7H5O3)2(C6H6NO)(H2O)2]·4H2O, consists of two kinds of Cd(II) complexes (A and B) and lattice water mol-ecules. In complex A, [Cd(C7H5O3)2(C6H6NO)2(H2O)2], the Cd(II) cation is located on an inversion center and is coordinated by two salicylate anions, two nicotinamide (NA) ligands and two water mol-ecules in a slightly distorted octa-hedral geometry. In complex B, [Cd(C7H5O3)2(C6H6NO)(H2O)2], the Cd(II) cation is coordinated by two salicylate anions, one nicotinamide (NA) ligand and two water mol-ecules in an irregular seven-coordinate geometry. There are extensive intra-molecular O-H?O and weak C-H?O hydrogen bonds as well as extensive inter-molecular O-H?O and N-H?O hydrogen bonding in the crystal structure. ?-? stacking between the pyridine and benzene rings, between the benzene rings, between the benzene and pyridine rings and between the pyridine rings [centroid-centroid distances = 3.5989?(10), 3.6005?(10), 3.5800?(9) and 3.5205?(10)?Å, respectively] further stabilize the crystal structure. A weak N-H?? inter-action also occurs. One of the lattice water mol-ecules is disordered over two positions with an occupancy ratio of 0.70:0.30.

SUBMITTER: Caylak Delibas N 

PROVIDER: S-EPMC3629475 | biostudies-literature | 2013 Apr

REPOSITORIES: biostudies-literature