title: Organoplatinum(IV) tris-chelate complexes, each having a cyclic metallacarbonate ring: synthesis, characterization and kinetic studies of the formation.
abstract: The complexes [Pt[(CH2)4](NN)], 1a (NN = 2,2'-bipyridine) and 1b (NN = 1,10-phenanthroline) react with 2,3-epoxypropylphenyl ether in the presence of CO2 to give tris-chelate platina(IV)cyclopentane complexes characterized by 1H and 13C NMR spectroscopy as [Pt[(CH2)4](CH2CHCH2OPhOCO2)(NN)], 2. The reactions proceed by the SN2 mechanism and the rates were independent of concentration of CO2. It is demonstrated that for 1a, the reaction proceeds 2.32 times faster than the similar reaction in which the dimethyl analog, [PtMe2(2,2'-bipyridine)], is used. The analog tris-chelate complex [Pt[(CH2)4](CH2CHPhOCO2)(phen)], 3a, was similarly synthesized.
authors.affiliation: Chemistry Department, College of Sciences, Shiraz University, Shiraz 71454, Iran. rashidi@chem.susc.ac.ir
authors.forename: Mehdi
authors.initials: M
authors.lastname: Rashidi
authors.forename: Nahid
authors.initials: N
authors.lastname: Shahabadi
authors.forename: S Masoud
authors.initials: SM
authors.lastname: Nabavizadeh
mesh_terms: D002254:Carbonates / Q000737:chemistry*; D002614:Chelating Agents / Q000138:chemical synthesis / Q000737:chemistry; D003500:Cyclization; D007700:Kinetics; D008968:Molecular Conformation; D009944:Organoplatinum Compounds / Q000138:chemical synthesis / Q000737:chemistry; D013696:Temperature
chemical_list: D002254:Carbonates; D002614:Chelating Agents; D009944:Organoplatinum Compounds