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- W2022153013 abstract "The controlled synthesis of isomeric organoplatinum clamshell dimers [Pt2Me2(μ2-κ3-6-dppd)2]2+, 6-dppd = 1,4-di-2-pyridyl-5,6,7,8,9,10-hexahydrocycloocta[d]pyridazine, is reported. The new complexes are formed selectively by self-assembly from mononuclear precursors, taking advantage of the slow cis–trans isomerization at platinum(II). Thus reaction of endo-[PtClMe(κ2-6-dppd)] with AgOTf gave endo,endo-[Pt2Me2(μ2-κ3-6-dppd)2]2+, while the reaction of [PtMe2(κ2-6-dppd)] with HOTf in solvent S = Me2CO or MeCN gave first a mixture of exo- and endo-[PtMe(S)(κ2-6-dppd)]+ and then, by loss of solvent, a mixture of exo,exo- and endo,endo-[Pt2Me2(μ2-κ3-6-dppd)2]2+. The endo,endo isomer slowly isomerized to the more stable exo,exo isomer in solution. Reaction of PPh3 with endo-[PtClMe(κ2-6-dppd)] gave a mixture of endo- and exo-[PtMe(PPh3)(κ2-6-dppd)]+ but reaction with exo,exo-[Pt2Me2(μ2-κ3-6-dppd)2]2+ gave exo-[PtMe(PPh3)(κ2-6-dppd)]+ selectively, with retention of stereochemistry. The structures of the clamshell dimers and of key precursors are reported and equilibria are studied both experimentally and by DFT calculations." @default.
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- W2022153013 date "2012-01-01" @default.
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- W2022153013 title "Self-assembly of isomeric clamshell dimers of platinum(ii)" @default.
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- W2022153013 doi "https://doi.org/10.1039/c2dt31584j" @default.
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