H. Poleschner et U. Schilde, THE FIRST STRUCTURE OF A VICINAL (E)-FLUOROSELENOOLEFIN - (E)-(5-FLUORO-4-OCTEN-4-YL)DIMETHYLSELENONIUM PICRATE, Acta crystallographica. Section C, Crystal structure communications, 52, 1996, pp. 644-647
The structure of the title compound, C10H20FSe+.C6H2-N3O7-, synthesize
d from (E)-4-methylseleno-5-fluoro-4-octene with trimethyloxonium tetr
afluoroborate, followed by anion exchange with sodium picrate, proves
the trans addition of RSeF equivalents in the fluoroselenenylation of
acetylenes with XeF2-R(2)Se(2) and XeF2-PhSeSiR(3) reagents [dihedral
angle Se-C4-C5-F-178.7 (1)degrees].