The chemistry of the brominated derivatives and the crystallographic determination of the structure of the tetrabrominated derivative of the C4-photodimers of 1,4-naphthoquinone
Abstract
The chemical investigation of the relationship between the
di- and tetrabrominated photodimers of 1, 4~naphthoquinone was
undertaken and a mechanism for the bromination introduced. The
crystal and molecular structure of the tetrabromide, c20H8o4Br 4'
was determined by three-dimensional X-ray diffraction methods.
It was established that the molecule has the anti conformation in
the solid state. It is considerably distorted because of overcrowding
of the bromine atoms in cis relationship but the bond lengths
are unaffected. The distortion is adequately described in terms
of the non-planarity of the cyclobutane ring.