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The orientation of the two phenyl rings in α,ω-diphenylalkanes with rigid carbon skeletons is investigated through characterization of the crystal and molecular structures of 1,3-diphenyladamantane (1) and trans-1,4-diphenylcyclohexane (2). The two phenyl rings in 1 have different conformations about the C-Ph bonds, with torsion angles between the phenyl ring and the C1-C2-C3 plane of 0.65 and 71...
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