76152-73-3Relevant academic research and scientific papers
The synthesis, stereochemistry, and crystal structure of exo-3-p-nitrobenzyl-endo-3-phenyl-3-phosphoniabicyclo[3.2.1]octane bromide
Mazhur-ul-Haque,Horne, William,Cremer, Sheldon E.,Kremer, Paul W.,Most, James T.
, p. 1467 - 1472 (2007/10/02)
The synthesis of the title compound is described. C20H23BrNO2P crystallizes in the monoclinic space group P21/c with cell constants a = 12.934(1), b = 8.996(1), c = 17.622(3) A, β = 106.74(1)°, Z = 4. The structure was solved by the heavy-atom method and refined to an R value of 0.046. The phosphorinanium ring adopts a chair conformation which is substantially flattened at the phosphorus end. The study confirmed the endo- and exo-disposition of phenyl and p-nitrophenyl substituents, respectively. The ring conformation, bond lengths, and angles as well as torsional angles are compared to calculated values of the silicon analogue; there is close similarity.
