In an article, published in an article, once mentioned the application of 1038-95-5, Name is Tri-p-tolylphosphine,molecular formula is C21H21P, is a conventional compound. this article was the specific content is as follows.category: chiral-phosphine-ligands
Comprehensive investigation on the reactivity of triarylphosphine radical cations by laser flash photolysis time-resolved UV?Vis spectroscopy
Laser flash photolysis at 266 nm was carried out on the acetonitrile solution of triarylphosphines, Ar3P, using a Nd YAG laser under oxygen, air, and argon atmospheres by varying the Ar3P concentration. The spectral change was monitored by time-resolved UV?Vis spectroscopy. A transient absorption that appeared on the TRUV spectrum within 100 ns after the laser flash was judged to result from the triarylphosphine radical cation, Ar3P?+, based on a comparison with previously reported spectra. The absorption decayed on a time scale of microseconds according to the first-order kinetics, in which the first-order rate constant, kobs, is expressed by kobs = kO2[O2] + kAr[Ar3P] + ks. The first term in this expression represents the radical coupling of Ar3P?+ with O2, whereas the second term likely results from an ionic reaction of Ar3P?+ with the parent phosphine. This finding suggests that Ar3P?+ undergoes either a radical coupling with oxygen or an ionic reaction with Ar3P to decay. Copyright
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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate