The structure of the π-molecular complex between 1,4-dihydro-9,10-anthrahydroquinone and 1,4-dihydro-9,10-anthraquinone

The structure of the π-molecular complex (10) was assigned on the basis of the solid state13C-nmr spectrum. The solid state13C-nmr spectrum of quinhydrone (12) has also been determined. Accurate1H and13C chemical shift assignments have been made for the compounds3,5,6,7,8, and10 on the basis of HMQC and HMBC spectral data. The π-molecular complex10 crystallizes in the space groupP21In with cell parameters:a=4.052 (1) Å,b=6.477 (1) Å,c=19.093 (2) Å, β=90.17 (1)o,z=1,Dc=1.400 g mc−32. Crystal and molecular structure of the title compound, C28H22O4, has been determined by an X-ray analysis of10 by direct methods from diffractometer data and refined by full-matrix least-squares