Abstract

Abstract The effect of the methylene bond angles on the electron spin-spin interaction has been semiempirically investigated for the quintet ground states of the m-phenylene-dimethylene radicals, especially m-phenylene-bismethylene and m-phenylene-bisphenylmethylene. The D and E values calculated are compared with those observed, and the most probable structure, with a methylene bond angle near 140°, is estimated, as in the phenylmethylene radical.

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