Synthesis of 1,2-bis(diphenylphosphino)ethane-bis-(trimethylstannyl)palladium(II) and its infrared spectrum; the infrared and raman spectra of 1,2-bis(diphenylphosphino)ethane-bis-(trimethylstannyl)platinum(II)
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Add time:09/07/2019 Source:sciencedirect.com
The hitherto missing palladium complex (Ph2 PCH2CH2PPh2)Pd(SnMe3)2 has been successfully prepared by a simple method involving replacement of the chlorides in the complex (Ph2PCH2CH2 PPh2)PdCl2 by Me3Sn groups using neat trimethylstannane. The complex is more susceptible to decomposition in non-aqueous solution and less stable to thermolysis than its platinum analogue. The infrared spectra of the two complexes are compared. They show many similar features. The Raman spectrum and proton NMR spectra of the analogous platinum complex in deuterobenzene and in phosphorus tribromide are also reported. The spectra confirm the presence of platinum-tin bonds in the complex. In phosphorus tribromide the platinum complex decomposed giving trimethyltin(lI)bromide and dimethyltin(II)dibromide. A possible reaction leading to the formation of dimethyltin(II)dibromide is proposed. Attempted synthesis of non-chelated palladium-tin complexes by oxidative addition of trimethylstannane to palladium(II) halides and palladium(O) complexes was unsuccessful.
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