Crystal structure of 1-{4-[bis-(4-methyl-phen-yl)amino]-phen-yl}ethene-1,2,2-tricarbo-nitrile.

ABSTRACT

The title compound, C25H18N4, crystallizes in the centrosymmetric ortho-rhom-bic space group Pbca, with eight mol-ecules in the unit cell. The main feature noticeable in the structure is the impact of the tri-cyano-vinyl (TCV) group in forcing partial planarity of the portion of the mol-ecule carrying the TCV group and directing the mol-ecular packing in the solid state, resulting in the formation of π-stacks of dimers within the unit cell. Short π-π stack closest atom-to-atom distances of 3.444 (15) Šare observed. Such motif patterns are favorable as they are thought to be conducive for better charge transport in organic semiconductors, which results in enhanced device performance. Intra-molecular charge transfer is evident from the shortening in the observed experimental bond lengths. The nitro-gen atoms (of the cyano groups) are involved in extensive short contacts, primarily through C-H⋯NC inter-actions with distances of 2.637 (17) Å.