The largest class of structurally studied quinones-the benzoquinone de
rivatives-consists of individual compounds (69 crystal structures), mo
lecular complexes (49 crystal structures), and ionic salts (28 crystal
structures). For these compounds, the site symmetry of a molecule in
the crystal and the agreement factor of the structure determination ar
e given. Based on the data available in the Cambridge Structural Datab
ase and scientific journals, some of the most interesting characterist
ics of molecular conformations, specific features of packings of the a
cceptor and donor molecules in complexes, and geometric characteristic
s of the anions in ionic salts are discussed.