Experimental and Theoretical Study of .pi.-Effects In P-Coordinated (Diphenylphosphino)alkynes

Ethynyltolan Platinum Complexes with (Arylalkynyl)phosphane Ligands

“…, which can be related to the triplebond polarisation, [9,13,59,60] is similar in both complexes [∆ = 28.5 (2) and 24.7 ppm (3)]. …”

Formation of Diphenylphosphanylbutadienyl Complexes by Insertion of Two P-Coordinated Alkynylphosphanes into a PtbC6F5 Bond: Detection of Intermediate and Reaction Products

“…[14b] In the case of the mixed complexes 4 and 5, the regioselectivity observed is probably governed by either electronic or steric demands of the alkyne termini. It could be related to an initial favored cis attack of the nucleophilic C 6 F 5 group on the less-hindered and more polarized (MÀPC dÀ a C d b R) [40] bcarbon of the alkyne. Another feature of the butadienyldiphosphane ligand, which merits comment, is the fact that in the final complex the PPh 2 groups are mutually cis not only in the vinyl unit but also in the h 2 -alkene fragment, and this indicates that an overall cis,cis di-insertion process has taken place.…”

Broadening the Scope of Ancillary Phosphane‐Type Ligands: A Systematic Comparison of PR3, PR2BH3–, and SiR3– and Their Chalcogen Derivatives

“…[43][44][45][46] In the second, Fp 2 is oxidized in the presence of phosphane ligand, typically with ferrocenium or cobaltocenium ions. [47][48][49] Using a different approach, Malisch has succeeded in isolating [(C 5 Me 5 )Fe(CO) 2 -(PPh 2 Me)]I, which was prepared by reaction of the corresponding diphenylphosphido complex with MeI and characterized spectroscopically. [29] To the best of our knowledge, no structurally characterized monomeric FpSiR 3 complexes in which the silyl ligand bears only alkyl and/or aryl substituents R have been previously reported.…”