Electronic absorption spectra of the cyclopropyl aryl ethers

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1. Introduction of a chlorine atom between the cyclopropane and benzene rings in the cyclopropyl aryl ethers (CAE) leads to a marked increase in the1L a band intensities in the electronic absorption spectra of these compounds. 2. Comparison of the electronic absorption spectra of the CAE and certain model phenol and anisole derivatives indicates that the cyclopropane ring is involved, at least to a certain extent, in general conjugation chain of the electronically excited state. 3. The existence of a linear correlation between the frequency of the long-wave maximum in the electronic absorption spectrum and the charge-transfer frequency in the CAE and substituted phenols is indication of similarity in the electronic effects in the electronically excited states of these two types of compounds.