4617-27-0Relevant articles and documents
3,5-Dimethylpyrazolyl-Substituted Di- and Trisiloxanes
Bitto, Florian,Brendler, Erica,B?hme, Uwe,Wagler, J?rg,Kroke, Edwin
, p. 4207 - 4215 (2016)
The synthesis and characterization of di- and trisiloxanes with 3,5-dimethylpyrazolyl (pz*) moieties are presented. Disiloxanes of the type O(SiMe3–npz*n)2(n = 1, 2, and 3 in 2, 3, and 4, respectively) are easily accessible through a trans-silylation approach. Crystal structure analyses of compound 4 and the two side products 5 and 6 illustrate different coordination motifs of pz* (terminal vs. bridging) in the disiloxane system. The reaction of O2Si3Cl8with Me3Sipz* led to the unsymmetrically substituted trisiloxane pz*3SiO-Sipz*2O-SiCl2pz* (7) with bridging pz* units and tetra- and pentacoordinate silicon atoms and the fully pyrazolyl-substituted trisiloxane O2Si3pz*8(8), depending on the choice of the reaction conditions. The29Si NMR properties of 7 were investigated by29Si CP/MAS NMR spectroscopy and supporting quantum chemical calculations analyzing the principal components of the chemical-shift tensor for all three silicon atoms in this molecule.
A CHROMATO-MASS SPECTROMETRIC STUDY OF THE DISPROPORTIONATION OF ORGANYLFLUOROSILOXANES
Voronkov, M. G.,Basenko, S. V.,Vitkovskii, V. Yu.,Gebel', I. A.,Mirskov, R. G.
, p. 1082 - 1084 (2007/10/02)
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