LTHIO)BUTYL]METHYL(2,4,6-TRIMETHYLPHENYL)PHOSPHINE OXIDE

IN the molecule of thio)-butyl]methyl(2,4,6-trimethylphenyl)phosphine oxide, C21H30NOPS, the P=O bond is nearly coplanar with plane are 0.13 7(1) and 0.038(2)Angstrom, respectively] and nearly parallel to the py ridyl ring [distances of the P and O atoms from the best plane are -1. 940(1) and -2.182 (2) Angstrom, respectively]. The structure is stabil ized by a C11-H111 ... N intramolecular hydrogen bond [H111 ... N 2.37 , C11 . bullet>. N 2.915(4)Angstrom, C11-H111 ... N 115 degrees] and a C20-H201 ... O(-1+x, 1/2-y, 1/2+z) intermolecular hydrogen bond [H201 ... O 2.41, C20 ... O 3.254 (4) Angstrom, C20-H201 ... O 148 degrees] (Fig.2).