B. Arul Prakasam

Crystal Structure of E-methyl-2-(1,3-Dimethyl-2,6-Diphenylpiperidin-4-Ylidene) Hydrazinecarboxylate Compound

The title compound crystallizes with three molecules and this compound. The structure was solved by SHELXS and it was refined by SHELXL. This compound adopts triclinic crystal systems with the space group P-1. The two phenyl rings are attached with the centre piperidine ring on each side and the methyl 2-methylene hydrazinecarboxylate system is connected to top of the piperidine ring. In each molecule the piperidine ring exhibits the chair conformations with the corresponding puckering parameters. The final R indices of this structure is 0.061. The bond lengths, torsion angles are calculated and it was tabulated. The molecules are linked by N–H…O interactions and this interactions makes the graph set motif of \( {\text{R}}^{ 4} {_{ 4}} ( 8) \). In this structure the C–H…O interactions are also found.

Crystal structure of isobutyl 4-(2-chloro-phen-yl)-5-cyano-6-{(E)-[(di-methyl-amino)-methyl-idene]amino}-2-methyl-4H-pyran-3-carboxyl-ate.

In the title compound, C21H24ClN3O3, the dihedral angle between the pyran ring (r.m.s. deviation = 0.037 Å) and the chlorobenzene ring is 88.56 (14)°. In the crystal, the molecules are linked by C—H⋯O interactions, generating C(7) (001) chains.