Cover illustration: (E)-N-Phenyl-N-(phenylcarbamoyl)-3-[propyl(trimethylsilyl)amino]acrylamide, an insertion product from propyl(trimethylsilyl)[2-(trimethylsilyl)ethenyl]amine and phenyl isocyanate, was obtained in the course of work on different types of silicon–nitrogen compounds. Si—N bonds can be subjected to the insertion of different heteroallenes such as CO2 and isocyanates. See: Herbig & Böhme [IUCrData (2023). 8, x230117].
The title compound, C22H29N3O2Si·0.5CHCl3, crystallizes in the the triclinic space group P with two host molecules and one chloroform molecule in the asymmetric unit. The core of the molecule consists of a urea unit bound to a 3-amino-acryloyl group. An intramolecular N—H⋯O hydrogen bond is present in both crystallographically independent molecules.
The title molecule is essentially flat. In the crystal the molecules are linked by a system of N—H⋯N hydrogen bonds formed by the hydrazinyl group, a Br⋯Br halogen bond, and π-stacking between the pyridine rings.