STRUCTURE OF A CHIRAL BICYCLIC 1-HYDROXYALKYL PHOSPHONAMIDE

The crystal structure of a chiral racemic 1-hydroxyalkyl phosphonamide , 4,5,6,7,-7a-octahydro-1H-1,3,2-benzodiazaphosphole 2-oxide, m.p. 455 -456 K, has been determined by X-ray diffraction. The title compound c onsists of a five-membered ring with a tetrahedrally coordinated phosp horus atom. In addition to the two N atoms of the five-membered ring, the phosphorus is bonded to an oxygen and the 1-carbon of a hydroxyalk yl chain. The five-membered ring is trans fused to a cyclohexane in th e chair conformation. The solid-state structure contains an intermolec ular hydrogen-bonded enantiomeric pair.