Chapter 9 - Arylamines (Anilines), Azines, and Oximes

Add time:09/30/2019    Source:sciencedirect.com

Publisher SummaryIn the vapor phase aliphatic aldehyde and ketone oximes exhibit vC=N in the range 1650–1665 cm-1, and in the liquid and solid phase in the range 1649–1670 cm-1. In the vapor phase vOH occurs in the range 3642–3654, and in CCl4 solution in the range 3580–3600cm-1. In CCl4 solution, the decrease in frequency in going from the vapor to CCl4 solution is attributed to intermolecular hydrogen bonding of form (OH···ClCCl3). In dilute CCl4 solution, the vOH frequencies form a linear plot when plotted vs Hammett σ values. In the neat or solid phase v(OH···HO), occurs in the range 3100–3330 cm-1, and is comparable to that exhibited by alcohols and phenols. In the vapor phase vN–O for both aliphatic and aromatic oximes are reported to occur in the range 910–980 cm-1, and in the liquid or solid phase for a larger number of oximes in the range 870–1030 cm-1.

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