5624-62-4Relevant articles and documents
Synthesis and base strengths of some (ω-methoxyalkyl)silanes and -germanes
Bellama,Gerchman
, p. 1618 - 1621 (2007/10/05)
In an attempt to determine to what extent an electron-rich substituent is affected by a group 4 metal atom when not directly bonded to that metal atom, we have synthesized three series of compounds of the type MH3(CH2)nOCH3 in which M = C, Si, and Ge and n = 1-6. A comparison of their base strengths (proton affinities) as measured by the shift in the infrared OH stretching frequency of methanol upon complexation with the ethers shows that some factor(s) other than inductive effects significantly influences the electron-donating ability of oxygen in the silicon and germanium hydrides when n = 1 and 2. At n = 3-6, however, the basicities of these ethers converge toward those of the carbon analogs. The silicon and germanium compounds not previously known have been characterized by infrared, proton magnetic resonance, and mass spectra, vapor pressure data, and melting points.
