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.name: Tri-p-tolylphosphine
[A] was added to the resin when coloration in a visible light region, an ultraviolet absorbing UV-a A area efficiently, and, excellent heat resistance and a new ionic compound containing an ultraviolet absorber of an ionic compound. (1) A compound represented by the formula [a] ionic compound and a ultraviolet-absorbing agent. (P or Q is N; R1 – R3 Is, substituted or unsubstituted alkyl or aryl C6 a-24 C1 a-8; R4 And R5 The alkyl C1 a-8, alkenyl C2 I 8, C2 V 8 alkynyl, aryl or fluoroalkyl C1 a-8 C6 a-24; X- The fluorine atom-containing anions; a is an integer of 1 – 5, b is an integer of 0 – 4, 0 – 5 c and d may be an integer, however, a + b is 1 – 5, c + d is 0 – 5, m is a + c)[Drawing] no (by machine translation)
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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