title: Tetraphenylarsonium iodide, a new determination.
abstract: The reported crystal structures of Ph(4)P(+).I(-) and Ph(4)As(+).I(-) have been re-examined. An apparent instance of substitutional dimorphism could not be reproduced and, contrary to an earlier report, tetraphenylarsonium iodide, [As(C(6)H(5))(4)]I or Ph(4)As(+).I(-), was found to be isostructural with the phosphorus compound. The cation and anion are both located on -4 symmetry sites. The crystal packing involves linear chains of cations in fourfold phenyl embraces.
authors: Department of Chemistry, University of Western Ontario, London, Ontario, Canada N6A 5B7. pawdean@uwo.ca
authors: Philip A W
authors: PA
authors: Dean
authors: Donald C
authors: DC
authors: Craig
authors: Marcia L
authors: ML
authors: Scudder
authors: Ian G
authors: IG
authors: Dance