In:
Zeitschrift für Naturforschung B, Walter de Gruyter GmbH, Vol. 62, No. 11 ( 2007-11-1), p. 1443-1452
Abstract:
Two polymorphs A and B of the previously unreported compound [Ph 3 PNPPh 3 ]+[(4-F-C 6 H 4 SO 2 ) 2 N] − have been revealed by serendipity (form A: triclinic, space group P1̄, Z′= 1; form B: monoclinic, space group P 2 1/n, Z′= 1). Conformational flexibility of both the cation and the anion appears to facilitate polymorph formation. The (C 3 P) 2 N moiety of the cation, as viewed down P···P′, is ecliptic in A but staggered in B, whereas the extended conformations of the anion (C-S···S′-C′ antiperiplanar) display notably different torsion angles about the S-N and the S-C bonds. Each structure is characterized by an extensive network of weak C-H···O/N/F hydrogen bonds and CH/π interactions. The packing of A consists of cation monolayers that intercalate parallel chains of anions. In contrast, polymorph B forms homoionic strands, whereby each strand comprises two ion chains and is surrounded by four parallel strands of opposite charge.
Type of Medium:
Online Resource
ISSN:
1865-7117
,
0932-0776
DOI:
10.1515/znb-2007-1114
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2007
detail.hit.zdb_id:
2078109-X
detail.hit.zdb_id:
124635-5
Permalink