Crystal structure of O-isopropyl [bis­(tri­methyl­sil­yl)amino](tert-butyl­amino)­phosphino­thio­ate

[Bis(tri­methyl­sil­yl)amino](tert-butyl­imino)­thio­phospho­rane reacts in benzene with isopropyl alcohol via 1,2-addition of an (i)PrO–H bond across the P=N bond, resulting in the title compound, C(13)H(35)N(2)OPSSi(2). In the mol­ecule, the P atom possesses a distorted tetra­hedral environment involving two N atoms from (Me(3)Si)(2)N– and (t)BuNH– groups, one O atom from an (i)PrO group and one S atom, therefore the mol­ecule has a stereocenter on the P atom but crystal symmetry leads to a racemate. In the crystal, a pair of enanti­omers form a centrosymmetric dimer via a pair of N—H⋯S hydrogen bonds.