Hexacoordinate silicon has been claimed to occur in bis(8-dimethylamin
o-naphth-1-yl) silanes on the basis of X-ray data and NMR spectra. Ver
y much the same effects are shown by a bis(8-dimethylamino-naphth-1-yl
) carbinol, pointing to essentially the same bonding in the Si and C c
ompounds. Faced with the choice that either the carbon in the carbinol
is hexacoordinate, too, or that the silicon in the silanes is, in fac
t, tetracovalent, we prefer the latter conclusion. (C) 1998 Wiley-Liss
, Inc.