Vapor pressure studies of trimethylamine and ketones in heptane solution have shown that unstable complexes are formed with cyclohexanone at 0° and with cyclohexanone and cyclopentanone at −40°. No complex formation was observed with methylethyl ketone, diethyl ketone, or cyclopentanone at 0°.
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Wheeler et al. (1959) studied this question.
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