Catena-Poly[[bis-(pyrazine-2-carbox-amide-N 4)mercury(II)]-di μ- Bromido]

Abstract

In the crystal structure of the title compound, [HgBr2(C 5H5N3O)2] n , the HgII cation is located on an inversion center and is coordinated by two N atoms from the pyrazine rings and four bridging Br- anions in a distorted octa-hedral geometry. The Br- anions bridge the HgII cations with significantly different Hg - Br bond distances of 2.4775 (8) and 3.1122 (8) Å, forming polymeric chains running along the a axis. Inter-molecular N - H⋯O and N - H⋯N hydrogen bonds are effective in the stabilization of the crystal structure.