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Updated: May 3, 2026

Facile Preparation of 4-Substituted Quinazoline Derivatives
Published on: February 15, 2016
A monoclinic polymorph of 1-benzoyl-4-thio-biuret
Namhun Kim1, Haneol Kim1, Sung Kwon Kang1
1Department of Chemistry, Chungnam National University, Daejeon 305-764, Republic of Korea.
Abstract:
The title compound, C9H9N3O2S, is a monoclinic (C2/c) polymorph of the previously reported triclinic structure [Kang (2013 ▶). Acta Cryst. E69, o1327]. The mol-ecule is almost planar with an r.m.s. deviation of 0.069 Å from the mean plane of all non-H atoms. The benzoyl and terminal thio-urea fragments adopt a transoid conformation with respect to the central carbonyl O atom. Two intra-molecular N-H⋯O hydrogen bonds are present. In the crystal, N-H⋯O and N-H⋯S inter-actions link the mol-ecules into zigzag chains extending along the c-axis direction.
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