An essentially planar conformation determined for an arylsulphonylurea by low-temperature nuclear Overhauser effect spectroscopy
Abstract
2-[3-(o)-Chlorophenylsulphonylureido]-4-methoxy-6-methyl-1,3,5-triazine (3) adopts a coplanar cis-amide conformation in non-aqueous solvents, in contrast to the trans-conformation normally preferred by simple arylamides; the planar conformation in (3) arises as a result of intramolecular NH
N hydrogen bonding.
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