Shengrui Tong, Weigang Wang, Chun-ping Ma
Nov 25, 2009
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Journal
Science China-chemistry
Abstract
The electronic structures and substituent effects in o-, m-, and p-iodoanisoles have been investigated by ultraviolet photoelectron spectroscopy (UPS). The observed UPS bands were analyzed by combining empirical arguments and theoretical methods. Owing to the electron-donating nature of both iodo- and methoxy substituents, the first ionization potentials of the three iodoanisoles are lower than those of iodobenzene and anisole. The presence of the two substituents in iodoanisoles leads to an electron- rich structure, which might contribute to the observed high reactivity of iodoanisoles in a number of organic reactions.