title: The experimental realization of a neutral homoaromatic carbocycle.
abstract: Infrared spectra recorded for 1,5-dimethyl-2,8:4,6-semibullvalenetetracarboxylic acid dianhydride (12) in the condensed and vapor phase clearly prove that in the vapor phase the dianhydride 12 is a homoaromatic ground state semibullvalene.
authors: Department of Chemistry, University of Idaho, PO Box 442343, Moscow, ID 83844-2343, USA.
authors: Peter R
authors: PR
authors: Griffiths
authors: Don E
authors: DE
authors: Pivonka
authors: Richard Vaughan
authors: RV
authors: Williams
mesh_terms: D000812:Anhydrides / Q000737:chemistry*; D001952:Bridged-Ring Compounds / Q000737:chemistry*; D015394:Molecular Structure; D013055:Spectrophotometry, Infrared / Q000379:methods*
chemical_list: D000812:Anhydrides; D001952:Bridged-Ring Compounds