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Infrared spectra of 2-propyn-1-ol, a compound with a triple bond and an OH group, have been measured up to 8GPa pressure. The liquid phase showed a phase transition around 2GPa for a thin sample spread on KBr. The sharpening of the infrared peaks and discontinuous frequency shift indicated a transition to a crystalline phase. For a thick sample, infrared spectra showed continuous changes in peak width...
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