394739-06-1Relevant articles and documents
Synthesis and Characterization of 2,4,6-Tris((dimethylamino)methyl)phenoxysilicon Compounds
Ahdab, Aman Akkari-El,Rima, Ghassoub,Gornitzka, Heinz,Barrau, Jacques
, p. 96 - 107 (2007/10/03)
A series of 2,4,6-tris((dimethylamino)methyl)phenoxysilicon compounds Σ4-nSi(OAr)n (Σ = Cl; n = 1 (1), 2 (2); Σ = Me, n = 1 (3), 2 (4); Σ = Me3Si, n = 1 (5), 2 (6), PhSiHn(OAr)33-n (n =2 (7), 1 (8)) and HnSi(OAr)4-n (n = 2 (9), 1 (10) has been synthesized by various adapted methods. The compounds were characterized spectroscopically by 29Si-, 1H-, 13C-, 15N-NMR. In solution the extent of Si...N bond formation and coordination in these compounds is determined from the 29Si-NMR (and 15N) chemical shifts and 1JSi-H. The silicon center is tetracoordinated in 3-6, pentacoordinated in 1, 2, 7, 8 and hexacoordinated [4+2] in 9. The 1H-NMR features are consistent, in all cases, with dynamic coordination mode of the o-NMe2 groups in solution at room temperature. The solid-state structures of the lithium phenolate and of compounds 6 and 9 have been determined by X-ray diffraction. The trimeric structure of ArOLi contains an Li3O3-ring that is almost perfectly planar; the structures of 6 and 9 confirm no N -> Si contact in 6 and a bicapped tetrahedral silicon in 9.