2-[(2Z)-Azepan-2-yl-idene]-1-(4-nitro-phen-yl)ethanone.
The title compound, C(14)H(16)N(2)O(3), is an NH-vinyl-ogous amide (enaminone) produced by the reaction of 4-nitro-phenacyl bromide with azepane-2-thione. The conformation about the C=C bond [1.3927 (14) Å] is Z, which allows for the formation of an intra-molecular N-H⋯O hydrogen bond that leads to an S(6) loop. Inversion-related mol-ecules associate via N-H⋯O hydrogen bonds to form a 12-membered {⋯OC(3)NH}(2) synthon.
Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg, PO Wits 2050,  South Africa.
Siyanda T
ST
Mthembu
Lee G
LG
Madeley
Charles B
CB
de Koning
Joseph P
JP
Michael