Comparison of the Reactivity of Platinum(II) and Platinum(0) Complexes with Iminophosphine and Phosphinocarbonyl Ligands

Chlorido[2-({[2-(diphenylphosphanyl)benzylidene]amino}methyl)thiophene-κ2N,P]methylpalladium(II)

“…The N-P combination brings about asymmetry in the Pd orbitals thereby affecting the reactivity of a complex. An investigation of the catalytic mechanism revealed that the hemilabile ligand present in the complex is accountable for the catalytic cycle because it allows the inflection of the steric properties around Pd, which determines the activity and selectivity parameters of the complexes containing these ligands (Espinet & Soulantica, 1999;Onani et al, 2010;Vaughan et al, 2011). The title compound is a bidentate and bulky complex that should be highly active for C-C coupling studies.…”

Imino-phosphine palladium(II) and platinum(II) complexes: Synthesis, molecular structures and evaluation as antitumor agents

“…Ligand L1 is reported for the first time to the best of our knowledge. L2 has been reported by other research groups [5,20,21] but it was independently prepared and characterized by us. The ligands were reacted with either PdCl 2 (cod) or PtCl 2 (cod) to give the corresponding new imino-phosphine palladium(II) and platinum(II) complexes 1-4 (Scheme 1).…”

“…Consequently, several metal complexes containing imino-phosphine ligands started to emerge in the early 1990s [2][3][4]. Since then, hetero-dentate ligands with hard and soft P-N donor atoms with interesting properties have been generated and continue to attract interest to date [5][6][7][8]. Upon coordination to transition metals, the hard and soft combination creates asymmetry in the metal orbitals, which subsequently regulates the reactivity of a complex bearing these ligands [5].…”

“…Since then, hetero-dentate ligands with hard and soft P-N donor atoms with interesting properties have been generated and continue to attract interest to date [5][6][7][8]. Upon coordination to transition metals, the hard and soft combination creates asymmetry in the metal orbitals, which subsequently regulates the reactivity of a complex bearing these ligands [5]. An illustration of this effect is demonstrated by the observed difference in the trans-influence of the phosphorus donor atom compared to either nitrogen or oxygen [5].…”

Dichlorido{N-[2-(diphenylphosphanyl)benzylidene]-2-methylaniline}palladium(II) acetonitrile monosolvate

“…Imino-phosphine complexes have been studied since the early 1990s (Newkome, 1993;Ghilardi et al, 1992). Their preparation is versatile because a wide range of amines and aldehydes of varying steric bulk are either available commercially or can be easily synthesized (Mogorosi et al, 2011;Nobre & Monteiro, 2009;Pellagati et al, 2005;Newkome, 1993;Ghilardi et al, 1992;Vaughan et al, 2011;Puri et al, 2011;Doherty et al, 2002;Onani et al, 2010;Motswainyana et al, 2012). The soft P atom coordinates strongly to soft metals, while the hard N atom is weakly coordinated and therefore more easily displaced, thus allowing hemilability.…”