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

Abstract

[Bis(trimethylsilyl)amino](tert-butylimino)thiophosphorane reacts in benzene with isopropyl alcohol via 1,2-addition of an iPrO–H bond across the P=N bond, resulting in the title compound, C13H35N2OPSSi2. In the molecule, the P atom possesses a distorted tetrahedral environment involving two N atoms from (Me3Si)2N– and tBuNH– groups, one O atom from an iPrO 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.

Keywords

• crystal structure
• (trimethylsilyl)amino
• phosphinothioate
• N—H...S hydrogen bonding