Crystal structure of catena-poly[[di-aqua-bis-(4-formyl-benzoato-?O (1))cobalt(II)]-?-pyrazine-?(2) N:N'].

ABSTRACT: In the title polymeric compound, [Co(C8H5O3)2(C4H4N2)(H2O)2] n , the Co(II) atom is located on a twofold rotation axis and has a slightly distorted octa-hedral coordination sphere. In the equatorial plane, it is coordinated by two carboxyl-ate O atoms of two symmetry-related monodentate formyl-benzoate anions and by two N atoms of two bridging pyrazine ligands. The latter are bis-ected by the twofold rotation axis. The axial positions are occupied by two O atoms of the coordinating water mol-ecules. In the formyl-benzoate anion, the carboxyl-ate group is twisted away from the attached benzene ring by 7.50?(8)°, while the benzene and pyrazine rings are oriented at a dihedral angle of 64.90?(4)°. The pyrazine ligands bridge the Co(II) cations, forming linear chains running along the b-axis direction. Strong intra-molecular O-H?O hydrogen bonds link the water mol-ecules to the carboxyl-ate O atoms. In the crystal, weak O-Hwater?Owater hydrogen bonds link adjacent chains into layers parallel to the bc plane. The layers are linked via C-Hpyrazine?Oform-yl hydrogen bonds, forming a three-dimensional network. There are also weak C-H?? inter-actions present.

SUBMITTER: Ask?n GS 

PROVIDER: S-EPMC4438811 | biostudies-other | 2015 Apr

REPOSITORIES: biostudies-other