Palladium complexes nuclear magnetic resonance

B. Akermark, B. Krakenberger, S. Hansson, Ligand Effects and Nucleophilic Addition to (T)3-Allyl)palladium Complexes. A Carbon-13 Nuclear Magnetic Resonance Study, Organometallics, 1987, 6, 620-628. 

The complex is thermally unstable. A similar reaction of H2 occurs with the complexes Ni(PEt3)3 and Pd(PEt3)3 259). Nuclear magnetic resonance spectroscopy confirms formation of hydro complexes however, when the hydrogen is removed the resonances are lost. The hydro complexes could not be isolated, and the suggestion of a dimeric structure for the palladium complex is very tentative 259). 

R. A. Widenhoefer developed a mechanistic study on the cyclization-hydrosilylation of various functionalized dienes catalyzed by cationic palladium phenanthroline or oxazoline complex (60). Kinetic, deuterium-labeling, and low temperature nuclear magnetic resonance studies permitted establishing a... 

The Pd(MeCN)4(BF4)2-catalysed conversion of allylic alcohols into allylic silanes and boronates has been investigated by product studies, kinetic studies, and H, B, F, and Si NMR (nuclear magnetic resonance) spectroscopy. The two reactions that occur by the same mechanism involve the formation of a palladium allylic alcohol [(a -allyl) palladium] complex after the alcohol is activated by BF3 formed from a BF4 ion of the catalyst. Then, a rate-determining, stereoselective transmetalation with Si(Me)2 and a reductive elimination of the palladium gives the linear silane. B2pin2 replaces Si(Me)2 in the borylation reaction. 

To benzo[A]quinolinyl palladium(II) pyridine-sulfonamido complex (12.8 mg, 0.0200 mmol) in acetonitrile-c/i (0.6 mL) at 23 °C was added l-chloromethyl-4-fluoro-l,4-diazoniabicyclo [2.2.2]octane bis(tetrafluoroborate) (7.1 mg, 0.020 mmol). After stirring for 10 min at 23 °C, the colorless suspension formed a dark purple solution. The complex was characterized by nuclear magnetic resonance (NMR spectroscopy) in acetonitrile solution without purification. ... 

Chatt J, Hitchcock PB, Pidcock A, Warrens CP, Dixon KR (1984) The nature of the co-ordinate link. Part 11. Synthesis and phosphorus-31 nuclear magnetic resonance spectroscopy of platinum and palladium complexes containing side-bonded ( )-diphenyldiphosphene. X-Ray crystal and molecular structures of [Pd (i )-PhP = PPh (Ph2PCH2CH2PPh2)] and [Pd [( )-PhP = PPh][W(CO)5]2 (Ph2PCH2CH2PPh2)]. J Chem Soc Dalton Trans 2237-2244... 

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