Olefin and acetylene complexes of platinum and palladium

An Intermediate in the Conversion of an Acetylene to a Vinyl Derivative: The Crystal and Molecular Structure of trans-Chloromethylbis(trimethylarsine)-platinum(II) Hexafluorobut-2-yne

“…The difference is also reflected in the different v,,, stretching frequencies for these complexes, being 1765 cm-' for the platinum(0) complex (28) and 1838 cm-' for the platinum(I1) complex (2). However, the decrease in v,,, of 473 cm-' observed for trans-Cl(CH,)(P (C,H,),),Pt-(hexafluorobut-2-yne) is greater than the value of 462 cm-' observed for the arsenic complex, indicating a stronger metal-acetylene bond, conclusion contradicted by J(Pt-F) measurements (2), and small differences in vc-, should therefore be interpreted with care (29). We are initiating further structural studies on platinum-acetylene complexes to explore the dependence of the bonding upon the geometry at, and the formal oxidation state of, the metal atom.…”

Copper(I)–olefin complexes. Structure of 1-chloro-2-(1-2-η-cyclohexene)-μ-[hydrotri(1-pyrazolyl)borato-N:N',N'']-dicopper(I), C15H20BClCu2N6

“…whereas ethylene and 1-hexene complexes have been characterized previously. It has been suggested that relief of strain is the most important factor in the bonding of cyclic olefins to transition metals (Hartley, 1969(Hartley, , 1972(Hartley, , 1973; a lengthened olefin bond may be a manifestation of this bonding interaction. Characterization of other Cu~-cyclohexene complexes is in progress to determine if a lengthening of the double bond is typical of these complexes.…”

Ruthenium(III) catalysis in polymerization of vinyl monomers by charge‐transfer mechanism with aminoalcohols and carbontetrachloride: A kinetic study

“…These complexes have widely been used as heterogeneous as well as homogeneous catalysts in various reactions including polymerization of olefins and acetylenes [4,5].…”

“…The kinetics of polymerization of vinyl monomers initiated by the charge-transfer mechanism in the presence of CCl 4 have been studied by many investigators [6][7][8][9][10][11] and different mechanisms for the reactions have been proposed. Rh III and Ru II complexes have also been reported to accelerate the rate of polymerization of vinyl monomers initiated by the charge-transfer mechanism [12].…”