Crystal and molecular structure of viridin
Abstract
The title compound crystallises in the orthorhombic system, space group P212121, with a= 16·090, b= 16·162, c= 6·195 Å. The crystal structure has been determined by statistical methods from a three-dimensional X-ray study based on 1580 visually estimated reflection intensities, and refined to a final R value of 0·092. The method of structure solution, and the conformation and geometry of the molecule are discussed in some detail, especially the unique combination of an aromatic ring C and an unsaturated ring E.