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What difference does a methyl group make: pentamethylbenzene?

Chemphyschem : a European journal of chemical physics and physical chemistry (2014-09-13)
Matthew Mudge, Boon K Ng, Catherine Jessica Onie, Mohan Bhadbhade, Richard A Mole, Kirrily C Rule, Anton P J Stampfl, John A Stride
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.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Tetracyanoethylene, 96%