Carbenium Ions and Alkoxides

Spectrum 1 illustrates how the interaction with tetramethylbenzene (by hydrogen-bonding) shifts the silanol band in Beta to 3563 cm and the bridging hydroxyls to even lower frequencies where overlapping absorption from hydrogen-bonded silanols make them difficult to detect In spectrum 1 the bands between 3100 and 

6 Elementarf Steps of Hydrocarbon Conversion over Zeolites 429 

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