In an article, published in an article, once mentioned the application of 17261-28-8, Name is 2-(Diphenylphosphino)benzoic acid,molecular formula is C19H15O2P, is a conventional compound. this article was the specific content is as follows.Formula: C19H15O2P
[nBu4N][Re(O)Cl4] or [Re(O)Cl2(OEt)(PPh3)2] react with PCOOH (2-(diphenylphosphanyl)benzoic acid) in different stoichiometries leading to the mono-substituted complexes [nBu4N][Re(O)Cl3(PCOO)] (2) and [Re(O)Cl2(PCOO)(PPh3)] (5), respectively. In CH2Cl2-MeOH, 2 rearranges partially into the neutral [Re(O)Cl2(PCOO)(MeOH)] (3). The mixed [Re(O)(OCH2CH2O)(PCOO)(MeOH)] (4) is obtained by reacting [nBu4N][Re(O)Cl4], ethylene glycol and PCOOH. The [PCOO]- ligand is bidentate and the coordination geometry around rhenium is distorted octahedral, as shown by the X-ray structural analysis of 2 and 3. In these complexes the phosphorus and the oxygen atoms of the phosphino-carboxylato ligand occupy an equatorial and an axial position, respectively.
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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