Synthesis and UV spectra of 8-mercaptoquinoline organosilicon derivatives and their metal halides complexes

IR and UV spectra of (8-quinolylthiomethyl)trimethylsilane (1), -trimethoxysilane (2), -silatrane (3) and their complexes with CuCl2, ZnCl2, PtCl2 and SnCl4 in MeCN have been studied. The UV spectra of 8-methylthioquinoline, its HN+ cation and HN+, HS+ dication were calculated at the AM1 (CI) level. It was shown that 1·PtCl2, 2·ZnCl2 and 3·ZnCl2 are chelates. The 2·SnCl4 and 3·SnCl4 compounds have a strong N→Sn bond. The 2·CuCl2 and 3·CuCl2 complexes are a mixture of coordination compounds having N→Cu or N→Cu←S bonds.