Bis(?-4-methyl-benzoato-?O:O')bis-[aqua-(4-methyl-benzoato-?O,O')zinc(II)]-bis-(?-4-methyl-benzoato-?O:O')bis-[(4-methyl-benzoato-?O)(nicotinamide-?N)zinc(II)]-water (1/1/2).

ABSTRACT: The crystal structure of the title compound, [Zn(2)(C(8)H(7)O(2))(4)(H(2)O)(2)]·[Zn(2)(C(8)H(7)O(2))(4)(C(6)H(6)N(2)O)(2)]·2H(2)O, consists of two kinds of dinuclear Zn(II) complexes (complex A and complex B) and uncoordinated water mol-ecules. In complex A, [Zn(2)(C(8)H(7)O(2))(4)(H(2)O)(2)], each Zn cation is chelated by a 4-methyl-benzoate (PMB) anion and coordinated by a water mol-ecule, and is further bridged by two PMB anions in a trigonal-bipyramidal geometry. In complex B, [Zn(2)(C(8)H(7)O(2))(4)(C(6)H(6)N(2)O)(2)], each Zn(II) cation is coordinated by a monodentate PMB anion and one nicotinamide (NA) ligand, and is further bridged by two PMB anions in a tetra-hedral geometry. Weak intra-mol-ecular ?-? stacking between adjacent benzene rings is observed in complex B, the centroid-centroid distance being 3.710?(2)?Å. Extensive O-H?O and N-H?O hydrogen bonding and weak C-H?O hydrogen bonding is present in the crystal structure. The crystal studied was a racemic twin; the minor twin component refined to 38%.

SUBMITTER: Hokelek T 

PROVIDER: S-EPMC3006769 | biostudies-literature | 2010 Jun

REPOSITORIES: biostudies-literature