Hn. De Armas et al., Synthesis, crystal structure, and molecular modeling (AM1) of Methyl 6-chloro-4-(2-chlorophenyl)-5-formyl-2-methyl-1,4-dihydropyridine-3-carboxylate, J CHEM CRYS, 30(4), 2000, pp. 237-243
The synthesis and structural characterization of Methyl 6-chloro-4-(2-chlor
ophenyl)-5-formyl-2-methyl-1,4-dihydropyridine-3-carboxylate is described.
The structure was refined to R-1 = 0.0470 for 2665 reflections (with I > 2
sigma (I)). Crystal data: C15H13C12NO3, monoclinic, space group P2(1)/c, a
= 11.163(9), b = 14.484(8), c = 9.422(7) Angstrom, V = 1512.9(19) Angstrom
(3), Z = 4. The results of crystallographic and molecular modeling (AM1) we
re compared. The Cl atom attached to the phenyl group has two possible orie
ntations, having 75% (sp) and 25% (ap) occupancy, respectively. The molecul
es in the crystal are held together by means of intermolecular hydrogen bon
ds of the type N-H . . .O and by C-H . . .O interactions.