Collect. Czech. Chem. Commun. 1995, 60, 856-862

Dipole Moments of para-Substituted N-Phenylsulfonyl-N'-Allylthioureas

Gejza Suchár and Ivan Danihel

Department of Organic Chemistry, P. J. Šafárik University, 041 67 Košice, Slovak Republic


Dipole moments of a series of para-substituted N-phenylsulfonyl-N'-allylthioureas were determined. Comparison of the experimentally found dipole moments with those calculated by vector addition of bond and group moments has shown that (E) conformation at the N-C bonds is preferred. The same result was obtained from the N-H stretching vibrations. The results are compatible with a synperiplanar arrangement at the C-C bond of the allyl moiety.