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Reference of 1038-95-5, An article , which mentions 1038-95-5, molecular formula is C21H21P. The compound – Tri-p-tolylphosphine played an important role in people’s production and life.

Investigating the synthesis and properties of diiron azadithiolate complexes is one of the key topics for mimicking the active site of [FeFe]-hydrogenases, which might be very useful for the design of new efficient catalysts for hydrogen production and the development of a future hydrogen economy. A series of new phosphine-substituted diiron azadithiolate complexes as models for the active site of [FeFe]-hydrogenases are described. A novel and efficient way was firstly established for the preparation of phosphine-substituted diiron azadithiolate complexes. The reaction of Fe2(mu-SH)2(CO)6 and phosphine ligands L affords the intermediate Fe2(mu-SH)2(CO)5L (A). The intermediate reacts in situ with a premixed solution of paraformaldehyde and ammonium carbonate to produce the target phosphine-substituted diiron azadithiolate complexes Fe2[(mu-SCH2)2NH](CO)5L (1a?1f) (L = P(C6H4?4-CH3)3, P(C6H4?3-CH3)3, P(C6H4?4-F)3, P(C6H4?3-F)3, P(2-C4H3O)3, PPh2(OCH2CH3)). Furthermore, reactions of the intermediate A with I-4-C6H4N(CH2Cl)2 in the presence of Et3N give the phosphine-substituted diiron azadithiolate complexes Fe2[(mu-SCH2)2NC6H4?4-I](CO)5L (2a?2e) (L = P(C6H4?4-CH3)3, P(C6H4?3-CH3)3, P(C6H4?4-F)3, P(C6H4?3-F)3, P(2-C4H3O)3). All the complexes were fully characterized using elemental analysis, IR and NMR spectroscopies and, particularly for 1a, 1c?1e, 2a and 2c, single-crystal X-ray diffraction analysis. In addition, complexes 1a?1f and 2a?2e were found to be catalysts for H2 production under electrochemical conditions. Density functional theory calculations were performed for the reactions of Fe2(mu-SH)2(CO)6 + P(C6H4?4-CH3)3.

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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