Chemistry of heterocyclic compounds. Part 128. Synthesis of cis-dichloro(2-pyridiniumyl)(phenylbis(2-pyridyl)phosphine)palladium(II) and structural aspects of precursors

2-Pyridyl-phosphine and -diphosphine complexes of nickel(0), their reactivity (including aqueous solution chemistry), and some related, incidental methylphosphonium iodides

“…Similarly for the Ni(P-P)(P 0 -P 0 ) complexes 7a and b that possess only four N-atoms, 2 J PP = 27.4 and 23.2 Hz, respectively, whereas for 7c, with eight N-atoms, 2 J PP = 10.3 Hz. The lower 2 J PP for 3a compared to those of 3b-d could possibly be due to p-stacking of phenyl rings on adjacent phosphine ligands; such stacking of two aryl rings in cis-PdCl 2 (PN 2 ) 2 has been shown to cause a weak p charge-transfer interaction between them, and a decrease in electron density around the Pd-P bonds [42] -a similar process in 3a could result in the 2 J PP value falling below those of the PN x -containing species.…”

Reactions of benzyldiphenylphosphine with Pd(II) sources on silica gel

“…X-ray studies of the cis-PdCl 2 (HL) 2 complexes with P-donor ligands are more rare and include derivatives of PMe 2 Ph [60], PMe 2 (2-Py) [61], PPh(2-Py) 2 [62], PPh 2 (OEt) [63], P(OPh) 3 [64] and a P-monodentate phosphoramidite [65].…”

“…one PdeP bond was shorter that the other by 0.0047 A. For comparison, each of two structures, cis-PdCl 2 [PPh 2 (OEt)] 2 and cisPdCl 2 (PMe 2 Ph) 2 , displayed identical PdeP and PdeCl bonds, while the difference in two PdeP bonds in cis-PdCl 2 [PPh 2 (2-py)] 2 was 0.0100 A [60,62,63]. The PdeP and PdeCl bond lengths in cis-3 are within the range reported for other cis-PdCl 2 (HL) 2 complexes [60e64].…”

Synthesis and characterization of new (N‐diphenylphosphino)‐isopropylanilines and their complexes: crystal structure of (Ph2P S)NHC6H44CH(CH3)2 and catalytic activity of palladium(II) complexes in the Heck and Suzuki cross‐coupling reactions

“…In the nonchelating phosphine complexes, the phosphorus signal of the cis-isomers has been always observed at lower field than that of the trans-isomer. [33,34] In the IR spectra, the υ(P-N) vibrations were observed as very strong bands at ca. 893, 917, 802 for 1d-3d and 918, 910, and 833 cm −1 for 1e-3e.…”