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N,N'-Bis(2,3-dimeth-oxy-benzyl-idene)ethane-1,2-diamine.

ABSTRACT: The title compound, C(20)H(24)N(2)O(4), crystallizes with two half (centrosymmetric) mol-ecules in the asymmetric unit. There are only minor differences between the geometric parameters between these two mol-ecules. The two aromatic rings in both mol-ecules are mutually coplanar.

SUBMITTER: Xue H

PROVIDER: S-EPMC3200920 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:The mol-ecule of the title Schiff base compound, C(16)H(14)Br(2)N(2), lies across a crystallographic inversion centre and adopts an E configuration with respect to the azomethine C=N bond. The imino group is coplanar with the aromatic ring. Within the mol-ecule, the planar units are parallel, but extend in opposite directions from the dimethyl-ene bridge. The crystal structure is stabilized by inter-molecular C-H⋯π inter-actions and Br⋯Br [3.6307 (4) Å] short contacts.

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Project description:The mol-ecule of the title centrosymmetric Schiff base compound, C(16)H(12)Cl(2)F(2)N(2), adopts an E configuration with respect to the azomethine C=N bond. The imino groups are coplanar with the aromatic rings. Within the mol-ecule, the planar units are parallel, but extend in opposite directions from the dimethyl-ene bridge. An inter-esting feature of the crystal structure is the short inter-molecular Cl?F [3.1747?(5)?Å] inter-actions, which are shorter than the sum of the van der Waals radii of these atoms. These inter-actions link neighbouring mol-ecules along the b axis. The crystal structure is further stabilized by ?-? inter-actions, with a centroid-centroid distance of 3.5244?(4)?Å.

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Project description:The asymmetric unit of the title compound, C(16)H(12)F(4)N(2), comprises half of the potentially bidentate Schiff base ligand, with an inversion centre located at the mid-point of the central C-C bond. The crystal packing is stabilized by inter-molecular C-H?N and ?-? inter-actions [centroid-centroid distance = 3.6793?(12)?Å and inter-planar spacing = 3.4999?(7)?Å].

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