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Ortho-rhom-bic modification of bis-[4-(3-pyridyl-methyl-idene-amino)-phen-yl]methane.

ABSTRACT: The title compound, C(25)H(20)N(4), is a disubstituted methane derivative having two pyridyl-methyl-ene-amino-phenyl arms, one of which is essentially rigid as all atoms lie on a plane (r.m.s. deviation = 0.074 Å), whereas the other is twisted [dihedral angle between the phenyl-ene and pyridyl rings = 51.1 (4)°]. The angle at the methyl-ene C atom is 113.2 (2)°.

SUBMITTER: Shah K

PROVIDER: S-EPMC3007987 | biostudies-literature |

REPOSITORIES: biostudies-literature

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An ortho-rhom-bic polymorph of 5-[(4-methyl-phen-yl)diazen-yl]salicylaldehyde.

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An ortho-rhom-bic polymorph of 6-de-oxy-6-iodo-1,2:3,4-di-O-isopropyl-idene-?-d-galactopyran-oside.

Project description:The title compound, C(12)H(19)IO(5), is the ortho-rhom-bic polymorph of a previously reported monoclinic form [Krajewski et al. (1987 ?). Bull. Pol. Acad. Sci. Chem.35, 91-102]. The dihedral angles between the six-membered ring and the two five-membered rings are 67.66?(14) and 71.79?(13)°, whereas the dihedral angle between the five-membered rings is 74.41?(12)°, indicating that all three rings are twisted from each other. The six-membered ring has a twist-boat conformation while both of the five-membered rings have envelope conformations. The crystal structure is stabilized by a network of C-H?O contacts linking the mol-ecules into a two-dimensional array parallel to the ab plane.

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