The First Hexabutadiynylbenzenes: Synthesis and Structures

Abstract

An important intermediate en route to antikekulene is the C30H6 hydrocarbon 1 d. A precursor for this intermediate is l a, which can be protodesilylated; but in contrast to 1 a–1 c, 1 d cannot yet be obtained in pure state. An X-ray crystal structure of 1 c confirms the high symmetry of the compound.