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.Formula: C21H21P
1.The spectral characteristics of H complexes with compounds of tervalent phosphorus are distorted substantially in presence of very small amounts of the corresponding derivatives of quinquevalent phosphorus (0.2-0.5percent) as impurity. 2.The method of checking the purity of compounds of tervalent phosphorus by the absence of the absorption band of the phosphoryl group is less effective than checking by the band of the H complexes with the samples investigated.
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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