Related Products of 50777-76-9, Chemistry can be defined as the study of matter and the changes it undergoes. You¡¯ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.50777-76-9, Name is 2-(Diphenylphosphino)benzaldehyde, molecular formula is C19H15OP. In a patent, introducing its new discovery.
Tridentate Schiff base-ruthenium(II) complexes containing soft phosphorus or sulfur donor atoms were prepared, and their bidirectional thermal and photo substitution reactions were investigated. In acetonitrile, the chloro ligands of trans(Cl,Cl)-[RuCl2(ppb-etol)(PPh3)] (1, ppb-etol = 2-(Ph2P)C6H4CH=N(CH2) 2OH) were substituted by acetonitrile molecules stepwise to yield [RuCl(CH3CN)(ppb-etol)(PPh3)]Cl (2) (first step) and [Ru(CH3CN)2(ppb-etol)(PPh3)]Cl2 (3) (second step). Complexes 2 and 3 reverted to complex 1 in acetonitrile upon irradiation with UV-Vis light. Similar thermal and photo substitution reactions were also observed for trans(Cl,Cl)-[RuCl2(btb-etol)(PPh3)] (4, btb-etol = 2-(tBuS)C6H4CH=N(CH2) 2OH). The substitution rates were measured for the first-step reactions of complexes 1 and 4 over the temperature range of 19.5-29.5 C in acetonitrile. Kinetic parameters were determined to be kobsd = (1.13 ¡À 0.04) ¡Á 10-4 s-1 (25.0 C), DeltaH? = 83.1 ¡À 1.7 kJ mol-1, and DeltaS? = -41.9 ¡À 5.6 kJ mol-1 for complex 1, and kobsd = (1.57 ¡À 0.06) ¡Á 10-3 s-1 (25.0 C), DeltaH? = 88.8 ¡À 1.9 kJ mol-1, and DeltaS? = -0.9 ¡À 6.5 kJ mol-1 for complex 4. Accordingly, the substitution reaction of complex 4 proceeded faster than that of complex 1. The structures of [RuCl2{ppb-(1R,2S)-ephe}(PPh3)] (5, ppb-(1R,2S)-ephe = 2-(Ph2P)C6H4CH=NCH(Me)CH(Ph)OH), complex 2, and [Ru(CH3CN)2{ppb-(R)-btol}(PPh3)](BF 4)2 (6, ppb-(R)-btol = 2-(Ph2P)C6H4CH=NCH(Et)CH2OH) were determined by X-ray analyses. In each complex, the geometry around the ruthenium atom is distorted octahedral, and the tridentate Schiff base and triphenylphosphine ligands occupy the equatorial positions.
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Reference£º
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