Intramolecular hydrogen bonds in compounds of the type C6Hs (CH3hSi (CHz) nOH (1/= 1, 2) and in (C6HshSiCH20H were studied by IR spectroscopy. By comparison with intramolecular hydrogen bonds in the carbon analogues, ro-phenylalkanols, the silicon atom weakens this interaction. Possible reasons for this phenomenon are discussed. IR spectroscopy was also used to determine acidities of the phenylsilylalkanols and ...