F. Iwasaki, Toshiya Watanabe, K. Maeda
Apr 1, 1987
Citations
0
Influential Citations
8
Citations
Journal
Bulletin of the Chemical Society of Japan
Abstract
The crystal structures of 2,4,4,6-Tetraphenyl-1,4-dihydropyridine (1) and 4-benzyl-1-methyl-2,4,6-triphenyl-1,4-dihydropyridine (2) have been determined by the X-ray method. The crystals of 1 are monoclinic, P21⁄a, a=12.883(1), b=12.953(1), c=12.575(1) A, β=94.95(1)°, V=2090.7(2)A3, Z=4, Dx=1.225 Mg m−3. 2 is triclinic P\bar1, a=7.786(1), b=14.324(1), c=10.759(1) A, α=90.51(1), β=106.89(1), γ=92.02(1)°, V=1147.2(2)A3, Z=2, Dx=1.196 Mg m−3. The final R values are 0.037 and 0.044 for 1 and 2, respectively. The 1,4-dihydropyridine ring of 1 is a flat twisted boat, while that of 2 has a boat conformation with the apexes at N(1) and C(4). For 1 the dihedral angles of the phenyl rings and the plane of four C atoms, C(2), C(3), C(5), and C(6), of the pyridine ring are 46.6, 106.4, 62.3, and 30.5° for 2-, 4-, 4-, and 6-phenyl rings, respectively. The corresponding angles of 2 are 30.4, 50.2, and 39.1° for 2-, 4-, and 6-phenyl rings. The phenyl ring of benzyl group covers to the pyridine ring making the dihedral a...