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By a combined IR and theoretical study, the oxygen basicity was found to be sharply decreased from mono- and di-functional alkoxysilanes to tri- and tetra-functional alkoxysilanes. An analysis of the natural bond orbital interactions in Me 4−n Si(OMe) n (n=1–4) and its 1:1 hydrogen bond complex with chloroform indicate that the basicity properties of Si–O–C unit may determined...
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