Complexation with diol host compounds. part 36:inclusion compounds of 1,1,6,6-tetraphenylhexa-2,4-diyne-1,6-diol with benzene, toluene and mesitylene.

Abstract

The title compound 1,1,6,6-tetraphenylhexa-2,4-diyne-1,6-diol (H) forms inclusion compounds with benzene, toluene and mesitylene. H·C6H6 (1) and H· 34 C7H8 (2) crystallize in the triclinic space group P(-1) with unit cell dimensions for 1: a = 13.001(3) Å, b = 15.284(3) Å, c = 16.744(3) Å, α = 99.26(3)°, β = 74.78(3)°, γ = 64.96(3)°, Z = 4 and for 2: a = 12.922(3) Å, b = 15.159(3) Å, c = 16.562(3) Å, α = 68.12(3)°, β = 73.99(3)°, γ = 66.00(3)°, Z = 4. The hydroxyl groups of adjacent host molecules are involved in hydrogen bonding. H·C9H12 (3) exhibits a different packing arrangement with weak hydrogen bonding between the hydroxyl hydrogen of the host and the phenyl ring of the guest. The crystal system of compound 3 is monoclinic with space group C2/c, a = 23.750(5) Å, b = 8.4746(17) Å, c = 17.760(4) Å, α = 90°, β = 123.40(3)°, γ = 90°, Z = 4. The thermal behaviour of these compounds has also been studied.