106900-62-3Relevant academic research and scientific papers
Isomers in fac-c)2> (Lc = cis-3,4-Dihydro-2,3,4,5-tetraphenyl-2H-1,2,3-diazaphosphole) arising from Chirality of Phosphorus Ligands: Separation and X-ray Structural Studies
Baccolini, Graziano,Busetto, Luigi,Roncarolo, Antonella,Albano, Vincenzo Giulio,Demartin, Franceso
, p. 21 - 26 (2007/10/02)
Reaction of cis-c)> with chiral Lc (cis-3,4-dihydro-2,3,4,5-tetraphenyl-2H-1,2,3-diazaphosphole) afforded fac-c)2> which, owing to the racemic nature of Lc (R,S-L), should be a mixture of three predictable diastereoisomers: fac- A) or meso-(B)> and the enantiomeric pair fac-.Two of these forms, meso-(A) and the enantiomeric pair, have been separated by column chromatography and their nature unambiguously attributed by X-ray studies. fac- crystallizes in the monoclinic space group P21/n, with a = 19.481(4), b = 13.204(3), c = 20.083(8) Angstroem, β = 110.56(3) deg, and Z = 4; R' = 0.046. fac-.C6H14.C7H16 crystallizes in the monoclinic space group P21/n, with a = 12.191(3), b = 20.939(4), c = 21.713(5) Angstroem, β = 93.93(3) deg, and Z = 4; R' = 0.048.Attempts to separate or detect spectroscopically isomers of fac- (L = racemic PMeEtPh) failed, indicating that interligand interactions are the determining factors in achieving the seperation.
