Collect. Czech. Chem. Commun. 1989, 54, 1441-1445

Reinvestigation of dipole moments of para substituted phenyl isocyanates and determination of dipole moment of NCO group by optimization procedure

Ivan Danihel, Falk Barnikol and Pavol Kristian

Department of Organic Chemistry, P. J. Šafárik University, 040 67 Košice


The values of dipole moments of a series of p-substituted phenyl isocyanates have been determined by the method of Halverstadt and Kumler. The experimental dipole moments measured have been used for determination of magnitude and direction of the group dipole moment of NCO group bound to a benzene ring (7·93.10-30 C m, 21 °C) by means of a simple optimization procedure.