2,4,6-Tri-tert-butyl-4-hydroxy-2,5-cyclohexadienone was synthesized by reac
tion of pentaphenyl-or penta-p-tolylantimony and 2,4,6-tri-tert-butylphenol
in toluene in the presence of water. According to the X-ray diffraction da
ta, the cyclohexadiene ring adopts a strongly flattened boat conformation w
ith the hydroxy group in equatorial position. The C=O and C-O distances are
1.226(5) and 1.433(5) Angstrom, respectively. The double C=C bond lengths
are 1.331(6) and 1.335(6) Angstrom, and the signle C-C bond lengths are 1.4
80-1.490(6) Angstrom.