title: What difference does a methyl group make: pentamethylbenzene?
abstract: The crystal structure of pentamethylbenzene has been obtained for the first time with the use of synchrotron radiation, whilst the low-energy spectrum of lattice dynamics, dominated by the methyl group torsions, was obtained using inelastic neutron scattering. The effect of symmetry lowering by the removal of a single methyl group relative to hexamethylbenzene has been investigated, including the role that this plays in the charge-transfer characteristics of complexes formed with tetracyanoethylene.
authors.affiliation: School of Chemistry, University of New South Wales, Sydney, New South Wales 2052 (Australia).
authors.forename: Matthew
authors.initials: M
authors.lastname: Mudge
authors.forename: Boon K
authors.initials: BK
authors.lastname: Ng
authors.forename: Catherine Jessica
authors.initials: CJ
authors.lastname: Onie
authors.forename: Mohan
authors.initials: M
authors.lastname: Bhadbhade
authors.forename: Richard A
authors.initials: RA
authors.lastname: Mole
authors.forename: Kirrily C
authors.initials: KC
authors.lastname: Rule
authors.forename: Anton P J
authors.initials: AP
authors.lastname: Stampfl
authors.forename: John A
authors.initials: JA
authors.lastname: Stride
keywords: X-ray diffraction; aromatic hydrocarbons; charge transfer; molecular packing; neutron scattering