artículo con referato
"Topological study of diverse hydrogen-bonded patterns found in a system of a nickel(II) complex and the sulfate anion"
M.A. Harvey, S. Suarez, P.N. Zolotarev, D.M. Proserpio and R. Baggio
Acta Cryst. C 74(3) (2018) 351-359
Abstract
A nickel(II) coordination complex, bis[2,6-bis(1H-benzimidazol-2-yl-κN3)pyridine-κN]nickel(II) sulfate, [Ni(C19H13N5)2]SO4 or [Ni(H2L)2]SO4, having four peripheral tetrahedrally oriented N–H donor units, combines with sulfate bridges to create hydrogen-bonded structures of varied dimensionality. The three crystal structures reported herein in the space groups P212121, I4 and Pccn are defined solely by strong charge-assisted N–H⋯O hydrogen bonds and contain disordered guests (water and dimethylformamide) that vary in size, shape and degree of hydrophilicity. Two of the compounds are channelled solids with three-dimensional structures, while the third is one-dimensional in nature. In spite of their differences, all three present a striking resemblance to the previously reported anhydrous relative [Guo et al. (2011). Chin. J. Inorg. Chem. 27, 1517-1520], which is considered as the reference framework from which all three title compounds are derived. The hydrogen-bonded frameworks are described and compared using crystallographic and topological approaches.
DEPARTAMENTO FISICA DE LA MATERIA CONDENSADA