Collect. Czech. Chem. Commun. 1986, 51, 264-270

Crystal and molecular structure of heptacain hydrochloride

František Pavelčíka, Milan Remkob, Jozef Čižmárikb and Jaroslav Majera

a Department of Analytical Chemistry
b Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Comenius University, 832 32 Bratislava


The crystal and molecular structure of heptacain hydrochloride was determined from three-dimensional diffractometric data. The carbamate group was found to be rotated out of the benzene ring plane by 15.5°, whilst the piperidine ring is in a more stable chair conformation. The heptyloxy side chain is in a stable all-trans conformation. The structure was refined by the full matrix least-squares method to a final R value 0.1127 for the observed reflections.