Monoorganosilicon complexes of the form RSi(QNO)2Cl (QNO = 8-oxyquinoline N-oxide; R = Me, t-Bu, Bn, Ph, p-tolyl) were synthesized and characterized by 1H, 13C, and 29Si NMR spectroscopy. X-ray crystal structures of PhSi(QNO)2Cl, MeSi(QNO)2(OSO2CF3), and multiple solvates of MeSi(QNO)2Cl revealed separated ion pairs with trigonal bipyramidal complex cations in each. In all cases, a single isomer is formed with both N-oxide groups in axial positions. The similarity of the NMR spectra of MeSi(QNO)2(OSO2CF3) and MeSi(QNO)2Cl in CDCl3 suggests that separated ion pairs are also present in solution.

Synthesis and characterization of cationic organosilicon complexes of 8-hydroxyquinoline N-oxide

2019 Spring National Meeting

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