Acta Crystallographica Section B

Structural Science

Volume 57, Part 4 (August 2001)

research papers

Acta Cryst. (2001). B57, 517-519 [ doi:10.1107/S0108768101007807 ]

Correction of the space group of [Ni(bipy)₂(ONO₂)₂]·2(pyrene)

F. H. Herbstein

Abstract: The crystal structure of [Ni(bipy)₂(ONO₂)₂]·2(pyrene), poly[[[bis(nitrato-O)nickel(II)]bis( [mu] -4,4'-bipyridyl-N,N'] bis(pyrene)], was originally reported in space group Pn [Biradha et al. (1999). Chem. Commun. pp. 1327-1328]. Reasons are given for changing the space group to P2₁/n. Consequently, incorrect descriptions of the title compound in the literature must be altered. In particular, the structure is not polar. It is further contended that description in terms of `complementary, interpenetrating covalent and noncovalent two-dimensional networks' is misleading as the `noncovalent network' (of pyrenes) has geometrical but not physical significance. The title compound is a typical host-guest inclusion complex.

Keywords: space-group correction; host-guest; inclusion complex.