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.