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Updated: Apr 10, 2026
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Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions
Published on: July 17, 2020
Synthesis and structure of a 1:1 1-phenyl-semicarbazide-1-phenyl-pyrazolidin-3-one cocrystal
S Muthu1,2, V L Siji3,2, S S Sreejith4
1Department of Chemistry, Sree Narayana College, Varkala, India.
Abstract:
The title cocrystal, C7H9N3O·C9H10N2O, was obtained by the cocrystallization of 1-phenyl-semicarbazide (A) and 1-phenyl-pyrazolidin-3-one (B) in a 1:1 molar ratio from methanol solution. The structure features a gauche arrangement about the N-N bond in the semicarbazide fragment and a twisted conformation of the pyrazolidinone ring. In the extended structure, the mol-ecules are linked by A → A and B → A N-H⋯O hydrogen bonds, supplemented by C-H⋯π contacts to generate a three-dimensional supra-molecular framework.
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