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Communication | Regular issue | Vol 22, No. 6, 1984, pp.1307-1313
Published online, 1st January, 1970
DOI: 10.3987/R-1984-06-1307
Crystal Structure Determination of the 2,6-Diphenyl-1,3,6,2-dioxazaphosphocane-p-monoborane Adduct. Evidence for the Lack of Transannular Interaction and Observation of a PhosphorusIV Atom Deformation towards Pseudopentacoordination

Rosalinda Contreras,* Apolonia Murillo, and Alain Klaébé

*Centro de Investigación y de Estudios Avanzados, Departmento de Química , I.P.N, Apartado 14-740, México, D.F., 07000, Mexico

Abstract

The X-ray crystal structure of the title compound shows a crown conformation of the ring and a strong 1,3 diaxial interaction between the P-BH3 group and the two corresponding hydrogens. This interaction leads an approach between the phosphorus and nitrogen. As a result the structure of phosphorusIV changes towards a pseudopentacoordinated geometry. The intracyclic Lewis interaction between N and P atoms is discarded due to the observed planarity of intracyclic anilic nitrogen.