Abstract

Single-crystal EPR studies of the charge transfer salts grown by the electrochemical oxidation of p-terphenyl (TP) and p-quaterphenyl (QP) in the presence of PF6− at −25 °C and +5 °C respectively, are reported. The TP salt exhibits an angular-dependent EPR linewidth varying between 70 and 125 mG at −48 °C and a g tensor of 2.00312, 2.00230 and 2.00206, while the QP salt exhibits an angular-dependent linewidth varying between 150 and 220 mG and a g tensor of 2.00310, 2.00217 and 2.00217, suggesting a pseudo reorientation about the chain axis, a feature not previously detected in other arene salt crystals.

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