23045-05-8Relevant academic research and scientific papers
NOVEL IRIDIUM-PLATINUM COMPLEX AND METHOD FOR PRODUCING SAME
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Page/Page column 7, (2009/01/20)
An iridium-platinum complex of the following formula: wherein Cp* is a pentamethylcyclopentadienyl ligand or the like, X is a hydrogen atom, or a substituent group such as a bromine atom or an organic group disposed at a position ortho, meta or para to the phenyl group, or at a combination of the positions, and Y is a methyl group or the like.
Kinetics of displacement of dimethyl sulfide from cis- and trans-dichlorobis(dimethyl sulfide)platinum(II) by heterocyclic amines in 1,2-dimethoxy ethane
Canovese, Luciano,Cattalini, Lucio,Marangoni, Giampaolo,Michelon, Gianni,Tobe, Martin L.
, p. 4166 - 4168 (2008/10/08)
Second-order rate constants for the reactions cis- or trans-[Pt(Me2S)2Cl2] + am → cis- or trans-[Pt(Me2S)(am)Cl2] + Me2S (am = pyridine, 4-methylpyridine, 3,4-dimethylpyridine, 3,5-dimethylpyridine, 3-methylpyridine, 2,4-dimethylpyridine, 2-methylpyridine, 4-cyanopyridine, m-diazine, p-diazine) in 1,2-dimethoxyethane at 25°C are reported. The trans complexes are some 2.5 times more reactive than the cis isomers, but the dependence of the second-order rate constant on the amine basicity is the same in both cases: log k2 = 0.18pKa(amH+) + c. The results are compared with published data for the opening of a bis(thioether) chelate and with those for the analogous sulfoxide complexes. It is concluded that the bond breaking transition state contributes much less to the overall reactivity of the thioether complexes than it does to the reactivity of the corresponding sulfoxide species.
