β Scribed by R. F. Rekker; W. Th. Nauta
No coin nor oath required. For personal study only.
This article gives the experimental results of UV measurements made on an extensive series of unsymmetrically substituted methylbenzophenones in solution (ethanol and isoβoctane). The results obtained are compared with our previously published UV measurements on symmetrically substituted benzophenones and correlated with literature data on the UV absorption of acetophenones.
From this investigation it appears that for the benzophenone series the oscillator strength f is an additive quantity, a fact which is very useful in comparing the various ketones with one another.
The comparison with acetophenone β in which not only f, but also the wavelength of the conjugative absorption band plays a part β supplied useful information on the position of the phenyl rings relative to the Cο£ΎO group.
π SIMILAR VOLUMES
## Abstract This article gives the experimental results of UV measurements made on a number of benzophenones with ethyl, __iso__propyl and __tert.__butyl groups as substituents. The results are compared with the previously published data on the corresponding methylβsubstituted benzophenones^1,2,3,4
## Abstract ^29^Si and ^13^C NMR spectra of trimethylphenoxysilane and three bis(trimethylsiloxy)benzenes have been investigated. Crowding in the __ortho__ derivative leads to a small but observable deshielding of both silicon and carbon nuclei of the trimethylsiloxy group. In comparison to analogo
A study has been made of the oxidation of a number of substituted benzhydrols by chromic acid in aqueous acetic acid. The reaction rate constants are linearly proportional to the KR+ values of the alcohols. ortho-Substitution increases the rate of reaction and reduces the magnitude of the primary ki