The molecular structure of tetramethoxysilane in the gas phase, an electron diffraction study

Vibrational spectra and structure of methoxysilanes and products of their hydrolysis

“…For tetramethoxysilane, lone-pair alignments lead to a S 4 structure, which was confirmed by spectroscopic [31,32] and electron diffraction [33] studies. Equilibrium structures of this molecule optimized with two basis sets used throughout this work are shown in Fig.…”

The Structure of Bis(catecholato)silanes: Phase Adaptation by Dynamic Covalent Chemistry of the Si–O Bond

“…The key structural parameters for the free molecules of 1 and 2 are rather similar for both substances. In the gas-phase structure of tetramethoxysilane, 24 the Si−O bond lengths at r g = 1.614(1) Å are significantly shorter than in 1 and 2. The same holds for the Si−O bonds in [1] 10 (Figure 7).…”

Tetrakis‐(N‐pyrrolyl)methane: Structurally Important Member of the C(NR2)4 Family

“…Thus, two large angles [117.02 (5)°] and four smaller ones [105.76 (10) to 105.88 (5)°] are reported for C(NMe 2 ) 4 and again two large ones [117.57 (12)° and 117.74 (12)°] and four small ones [105.48 (14)° to 105.60 (14)°] for structure 3 . In addition, differences of the central angles are also predicted for C(NH 2 ) 4 and Si(NH 2 ) 4 by DFT calculations and have been found in the experimentally determined gas‐phase structures of C(OMe) 4 and Si(OMe) 4 . Thus, this structure determination of 4 is important in this context because the results show distinctly smaller deviations from tetrahedral symmetry than the comparable compounds 3 and C(NMe 2 ) 4 .…”