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- W2172266941 abstract "The reaction of the Lewis acid B(C6F5)3 with silanol groups of silica surfaces, dehydroxylated at different temperatures (300, 500, 700, and 800 °C), has been investigated in presence of the Brønsted base NEt2Ph. The structure of the resulting modified silica supports [≡Si−OB(C6F5)3]−[HNEt2Ph]+ (1) has been carefully identified by IR and multinuclear solid-state NMR spectroscopies, isotopic 2H and 18O labeling, elemental analysis, molecular modeling, and comparison with synthesized molecular models. Highly dehydroxylated silica surfaces were required to transform selectively each silanol group into unique [≡Si−OB(C6F5)3]−[HNEt2Ph]+ fragments. For lower dehydroxylation temperatures, two sorts of surface sites were coexisting on silica: the free silanol groups [≡SiOH] and the ionic species 1." @default.
- W2172266941 created "2016-06-24" @default.
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- W2172266941 date "2002-03-15" @default.
- W2172266941 modified "2023-10-15" @default.
- W2172266941 title "Surface Organometallic Chemistry of Main Group Elements: Selective Synthesis of Silica Supported [≡Si−OB(C6F5)3]−[HNEt2Ph]+" @default.
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- W2172266941 doi "https://doi.org/10.1002/1521-3765(20020315)8:6<1438::aid-chem1438>3.0.co;2-9" @default.
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