Ethyl 3-oxo-2-(2-phenylhydrazinylidene)butanoate: a re-determination
نویسندگان
چکیده
The previous crystallographic studies [Wang et al. (2005 ▶). Huaxue Yanjiu16, 29-32; Wang et al. (2007 ▶). Youji Huaxue, 27, 524] of the title compound, C(12)H(14)N(2)O(3), gave only the unit-cell dimensions and an R factor with no other details available: the full structure is presented here. The eth-oxy group is disordered over two orientations with refined occupancies of 0.642 (15):0.358 (15). The nine C atoms and two N atoms of the 1-phenyl-2-(propan-2-yl-idene)hydrazine segment of the mol-ecule are close to being coplanar, with a maximum deviation of 0.0779 (14) Å for the phenyl-amino N atom and an intra-molecular N-H⋯O hydrogen bond generates an S(6) ring. In the crystal, pairs of C-H⋯O hydrogen bonds link mol-ecules into inverson dimers, generating R(2) (2)(16) loops.
منابع مشابه
2-Azaniumyl-4-(ethylcarbamoyl)butanoate: the zwitterionic form of the amino acid theanine
In the title zwitterion, C(7)H(14)N(2)O(3), the ethyl-amino and the 5-oxo groups are positionally disordered with occupancy ratios of 0.50:0.50 and 0.70:0.30, respectively. The terminal ethyl -CH(3) group undergoes considerable thermal motion. In the crystal, mol-ecules are linked via N-H⋯O hydrogen bonds, forming a two-dimensional arrangement propagating in the bc plane.
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