Crystal structure of an HgII coordination polymer with an unsymmetrical dipyridyl ligand: catena-poly[[[di-chlorido-mercury(II)]-?-N-(pyridin-4-ylmeth-yl)pyridin-3-amine-?2N:N'] chloro-form hemisolvate].

ABSTRACT: The asymmetric unit of the title compound, {[HgLCl2]·0.5CHCl3} n (L = N-(pyridin-4-ylmeth-yl)pyridin-3-amine, C11H11N3), contains one HgII ion, one bridging L ligand, two chloride ligands and a chloro-form solvent mol-ecule with half-occupancy that is disordered about a crystallographic twofold rotation axis. Each HgII ion is coordinated by two pyridine N atoms from two symmetry-related L ligands and two chloride anions in a highly distorted tetra-hedral geometry with bond angles falling in the range 99.05?(17)-142.96?(7)°. Each L ligand bridges two HgII ions, forming polymeric zigzag chains propagating in [010]. In the crystal, the chains are linked by inter-molecular N/C-H?Cl hydrogen bonds together with weak C-H?? inter-actions, resulting in the formation of a three-dimensional supra-molecular network, which is further stabilized by C-Cl?? inter-actions between the solvent chloro-form mol-ecules and the pyridine rings of L [chloride-to-centroid distances = 3.442?(11) and 3.626?(13)?Å]. In addition, weak Cl?Cl contacts [3.320?(5)?Å] between the chloro-form solvent mol-ecules and the coordinating chloride anions are also observed.

SUBMITTER: Moon SH 

PROVIDER: S-EPMC5095822 | biostudies-other | 2016 Nov

REPOSITORIES: biostudies-other