The rare 42.63.8 network and a chiral, trigonal net in crystal structures of 1,3,5-tris(4-pyridyl)benzenes

Abstract

1,3,5-tris[4-Pyridyl(ethenyl)]benzene (1) functions as a four-connected node in the first organic example of 4².6³.8 network (SrAl₂ type) sustained by weak C–H⋯N hydrogen bonds. 1,3,5-tris[4-Pyridyl(ethyl)]benzene (2) crystallizes in a chiral, trigonal 3,6 network that is characteristic of octupolar NLO materials. These network topologies are atypical compared to the more common hexagonal packing of trigonal molecules.