a. The structure of a standard C4 group chemically bonded to a silica surface through asilyl ether bond.b. A reasonable mechanism by which acid hydrolysis (H* and H20) might cleave thesilyl ether bond, including the products of the reaction.

Answered: a. The structure of a standard C4 group…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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a. The structure of a standard C4 group chemically bonded to a silica surface through a
silyl ether bond.
b. A reasonable mechanism by which acid hydrolysis (H* and H20) might cleave the
silyl ether bond, including the products of the reaction.

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The most commonly used column in silica based reverse stationary phase is octadecyl alkyl group bonded with silica (C₁₈H₃₇). The R groups C₈, C₁₈ and phenyl groups are used depending on the analyte and mobile phase. These alkyl groups make the column hydrophobic through covalent bonding of silica surface. These hydrophobic molecules of the mobile phase tend to adsorb to the silica stationary phase and hydrophilic molecules pass through easily and eluted first.

(a) The structure of the standard C₄ group chemically bonded to silica surface through a silyl ether bond is as follows:

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