1954/12/01 by J. H. Bryden, Jason McCullough · 2 citations
Biochemistry, Genetics and Molecular Biology · Chemistry · #Crystal structures of chemical compounds #Natural product bioactivities and synthesis #Synthesis and bioactivity of alkaloids
paper · pdf · doi:10.1107/s0365110x54002551
openalex publication_date 1954/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/27
Crystals of benzeneseleninie acid, CeHsSeO~H, are monoclinic holohedral with ao = 10.29, b 0 = 5.14, c o ----12.63 A and fl = 99 15'. The space group is P21/c and there are four molecules in the unit. By means of projections on (010) and three-dimensional Fourier syntheses making use of 785 observed F values, the structure was completely determined. The molecule has a pyramidal configuration about the selenium atom. The Se-O distances are 1.707 and 1.765 A and the Se-C distance is 1-903 A. The bond angles at selenium are 9.9.0 , 98.5 , and 103.5 . Within the limits of error of the determination the phenyl group is a regular hexagon with a C-C distance of 1.40 A. The molecules form infinite chains along the twofold screw axes. Within the chains the molecules are held together by strong hydrogen bonds with an O-O separation of 2.520 A. The ch.ains are held to one another by means of van der Waals forces.