Synthesis, Properties, and Reactions of Monosulfonated Triphenylphosphine (PPh2(m-C6H4SO3K) = TPPMS) Complexes of Iridium(I). Crystal and Molecular Structure of [N(CH2C6H5)(C2H5)3+][PPh2(m-C6H4SO3)-]·H2O

Autor:	Ronald F. See, David P. Paterniti, and Melvyn Rowen Churchill, Jim D. Atwood, Paul J. Roman
Rok vydání:	1997
Předmět:	Aqueous solution Ligand Organic Chemistry Water gas chemistry.chemical_element Zonal and meridional Photochemistry Medicinal chemistry Toluene Inorganic Chemistry chemistry.chemical_compound chemistry Molecule Iridium Physical and Theoretical Chemistry Triphenylphosphine
Zdroj:	Organometallics. 16:1484-1490
ISSN:	1520-6041 0276-7333
DOI:	10.1021/om960911a
Popis:	Iridium complexes containing the TPPMS ligand (TPPMS = PPh2(m-C6H4SO3K)) have been prepared and studied in DMSO and H2O as a comparison to the PPh3 analogues in toluene. Measurements of the pH of the complexes show that most are almost neutral, but Ir(CO)(H)(TPPMS)3 is basic (pH = 10.7). The basicity of Ir(CO)(H)(TPPMS)3 is confirmed by its reaction with H2O to give Ir(CO)(H)2(TPPMS)3+. In aqueous solution, reaction of trans-Ir(CO)(OH)(TPPMS)2 with H2 produces only fac-Ir(CO)(H)3(TPPMS)2 not the usual mixture of facial and meridional isomers. This is attributed to a hydrogen-bonding interaction between the two cis-TPPMS ligands in H2O. Reaction of trans-Ir(CO)(Cl)(TPPMS)2 with CO in water produces [Ir(CO)2(TPPMS)2+]Cl- and [Ir(CO)3(TPPMS)2+]Cl sequentially in a reaction that is pH dependent. Reaction of trans-Ir(CO)(OH)(TPPMS)2 with CO results in products based on the water gas shift-reaction. These complexes of TPPMS are spectroscopically very similar to the PPh3 analogues, but display significantly diff...
Databáze:	OpenAIRE
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