IR, MS studies on (±)-1-[3-(2-methoxyphenoxy)-2-hydroxypropyl]-4-[(2,6-dimethylphenyl)aminocarbonylmethyl]piperazine dihydrochloride salt

The vibration spectrum and FAB mass spectrum of (±)-1-[3-(2-methoxyphenoxy)-2-hydroxypropyl]-4-[(2,6-dimethylphenyl)aminocarbonylmethyl]piperazine dihydrochloride salt was studied. By comparing with the spectra of free base, different bands of IR were found in the NH + stretching, the NH + defomation motion, the CH 2 of N CH 2 group symmetric stretching, the CH 2 of N CH 2 group twisting and the CN stretching. FAB shows the basic peak is M + H. Other m/ e peaks are consistent with the structrue.