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A second monoclinic polymorph of 4,4'-[butane-1,4-diylbis(nitrilo-methyl-idyne)]dibenzonitrile.

ABSTRACT: The asymmetric unit of the title Schiff base compound, C(20)H(18)N(4), contains one half-mol-ecule, lying across a crystallographic inversion centre and adopting an E configuration with respect to the C=N bonds. The imino group is coplanar with the benzene ring with a maximun deviation of 0.096?(1)?Å for the N atom. Within the molecule, the planar units are parallel but extend in opposite directions from the methylene bridge. In the crystal structure, neighbouring mol-ecules are linked together by weak inter-molecular C-H?N hydrogen bonds involving the cyano N atoms, forming R(2) (2)(10) ring motifs.

SUBMITTER: Kia R 

PROVIDER: S-EPMC2960069 | biostudies-literature | 2008 Nov

REPOSITORIES: biostudies-literature

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A second monoclinic polymorph of 4,4'-[butane-1,4-diylbis(nitrilo-methyl-idyne)]dibenzonitrile.

Kia Reza R   Fun Hoong-Kun HK   Kargar Hadi H  

Acta crystallographica. Section E, Structure reports online 20081120 Pt 12

The asymmetric unit of the title Schiff base compound, C(20)H(18)N(4), contains one half-mol-ecule, lying across a crystallographic inversion centre and adopting an E configuration with respect to the C=N bonds. The imino group is coplanar with the benzene ring with a maximun deviation of 0.096 (1) Å for the N atom. Within the molecule, the planar units are parallel but extend in opposite directions from the methylene bridge. In the crystal structure, neighbouring mol-ecules are linked together  ...[more]

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