N-METHYLBENZOTHIAZOLE-2(3H)-SELONE, C8H7NSSE

The crystal structure of N-methyl-1,3-benzothiazole-2(3H)-selone (mbts ) has been studied in order to estimate the changes in the molecular g eometry of the mbts ligand upon coordination. Hypervalent complexes of mbts with Te-II and I-I have been studied by us previously. A signifi cant elongation of the Se=C bond [from 1.817 (7) in mbts to 1.85-1.88 Angstrom in the complexes] was found, but there were no significant ch anges in the other geometric parameters of the ligand. The only other bond-length decrease of note was for SeC-NMe [from 1.35 (1) in mbts to 1.32-1.34 Angstrom in the complexes]. Thus, only the amino group take s part in electron redistribution upon coordination.