Collect. Czech. Chem. Commun. 1986, 51, 2582-2589

17O, 13C, and 29Si NMR spectra of some acyloxy- and diacetoxysilanes and acetoxygermanes

Antonín Lyčkaa, Jaroslav Holečekb, Karel Handlířb, Josef Polac and Václav Chvalovskýc

a Research Institute of Organic Syntheses, 532 18 Pardubice-Rybitví
b Department of General and Inorganic Chemistry, Institute of Chemical Technology, 532 10 Pardubice
c Institute of Chemical Process Fundamentals, Czechoslovak Academy of Sciences, 165 02 Prague 6-Suchdol


The 17O, 13C, and 29Si NMR spectra of (CH3)3SiOC(O)R, CH3(XCH2)Si(OC(O)CH3)2, and R3GeOC(O)CH3 compounds are reported. In the 17O NMR spectra at 350 K the only signal is observed with the two latter series, but two well-resolved signals are displayed with the (CH3)3SiOC(O)R compounds. The equivalence of both oxygen atoms in carboxyl group on the NMR time scale is discussed from the viewpoint of a possible coordination of the oxygen atoms to the IVB group element of the periodic system.