2,4-Bis{[6-(2,2-dimethylpropyl)-3-ethyl-1,3-benzothiazol-2(3H)-ylidene]methyl}cyclobutenediylium-1,3-diolate

Abstract

The title compound, C34H40N2O2S2, adopts a trans conformation. The four conjugated Csp2-Csp2 single and double bonds of the polymethinic moiety, which bridges both heterocyclic end groups and the central four-membered ring, display nearly equal bond lengths. The molecule is nearly planar, with interplanar angles between the benzothiazole end groups and the central four-membered ring of 6.9 (1) and 7.7 (1) degrees; the angle between the heterocyclic systems is 1.8 (1) degrees. The crystal packing involves pi-stacking effects, with intermolecular C...C distances varying from 3.755 (3) to 3.991 (3) A.