The head-to-head photodimer of indenoindene

Abstract

Irradiation of 1-(1-benzocyclobutenylidene)benzocyclobutene gives indenoindene and its head-to-head photodimer nonacyclo[9.7.7.72,10.01,11.02,10.03,8.012,17.019,24.026,31]dotriaconta-3,5,7,12,14,16,19,21,23,26,28,30-dodecaene, C32H24. The molecule is built from four essentially planar indane units attached to an elongated cyclobutane ring. In the crystal, C—H...π interactions connect molecules into layers parallel to the bc plane.

Supramolecular architectures featuring Se⋯N secondary-bonding interactions in crystals of selenium-rich molecules: a comparison with their congeners

“…Dimeric aggregates featuring a pair of Se⋯N contacts are noted in the crystals of 1-6. [73][74][75][76][77][78] A fourmembered, centrosymmetric {⋯Se-N} 2 synthon is found in each of 1, 73 Fig. 2(a), and 2, 74 Fig.…”

“…Geometric parameters (Å, °) for aggregates in[71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87][88] …”