CONFORMATION TRANSITION AND BEHAVIOR OF THE ULTRASONIC-ATTENUATION INCYCLOHEXANOL AND AQUEOUS-SOLUTION OF CYCLOHEXANOL

Experimental results for the absorption of ultrasonic waves in pure cy clohexanol and aqueous solution of cyclohexanol in the frequency range 0.06-150 MHz and at temperatures 30, 40, 50, and 60 degrees C are rep orted. The ultrasonic relaxation spectra of pure cyclohexanol investig ated show two relaxation processes in contrast to those aqueous soluti ons of cyclohexanol, which indicate a single relaxation process, One r elaxation process is located in the frequency range 0.01-1 MHz and the second in the range 0.8-10 GHz. The process with the lower relaxation frequency has been assigned to the ''chair''-''chair'' molecular conf ormations. (C) 1998 Acoustical Society of America.