Chemistry of vinylidene complexes. XXI. Synthesis, spectroscopic and structural study of the RePt and MnPt μ–vinylidene complexes

Chemistry of vinylidene complexes. XXIV. A new μ-vinylidene complex containing RePt core, and platinum-bound carbonyl ligand. Spectroscopic, structural and electrochemical study

“…A doublet at δ 143.2 (with 2 J PtC and 3 J PC couplings of 104 Hz and 5.5 Hz, respectively) arises from the C 2 atom of vinylidene ligand. Similar chemical shifts of signals of the phenylvinylidene ligand in the 1 H and 13 C NMR spectra were earlier reported for the previously described μ-vinylidene complexes [17,18,33].…”

“…Indeed, the Pt-bound CO ligand of 1 can be readily substituted upon addition of such nucleophiles like PPh 3 to give the complex 2 in high yield. Displacement of CO and PPh 3 ligands occurs under reaction of 1 with 1,2bis(diphenylphosphino)ethane to yield the known RePt complex with dppe ligand at the Pt atom [33] (Scheme 3). The formation of both complexes in their reaction mixture was deduced from IR spectra in which a gradual decrease of the high frequency band at 2030 cm -1 and a low-frequency shift of the two ν(CO) bands of the Re-bound carbonyls are observed.…”

“…The 1 H, 13 C{ 1 H} and 31 P{ 1 H} NMR spectra were obtained using NMR spectrometer AVANCE III 600 DPX (Bruker, Germany). The X-ray data were obtained with the SMART APEX II diffractometer (Bruker AXS, Germany [33] and [34]. All other reagents were obtained from commercial sources and used as received.…”

“…The forth yellow fraction was eluted with benzene and after evaporation of solvent gave 25 mg (31%) of [Cp(CO) 2 Re(μ-C=CHPh)Pt(PPh 3 ) 2 ] (2) identified by IR spectra [33]. IR (CH 2 Cl 2 , cm -1 ): 1933s, 1858 m, br (ν CO ); (KBr, cm -1 ): 1922s, 1857m (ν CO ).…”

Phenylvinylidene Clusters Containing ReFePt Metal Cores and Chelate Diphosphine Ligands at the Platinum Atom

“…Раство-рители (бензол, диэтиловый эфир, петролейный эфир, тетрагидрофуран, хлористый метилен) предварительно очищали от примесей, следов воды и кислорода путем перегонки над соот-ветствующими осушителями. Комплексы Cp(CO) 2 Re(μ-C=CHPh)Pt(P-P) (P-P = dppe (7); dppp (8)) и CpReFePt(µ 3 -C=CHPh)(CO) 6 (PPh 3 ) (3) синтезированы по методикам [20,23]. В экспери-ментах использованы 1,2-бис(дифенилфосфино)этан (Merck), 1,3-бис(дифенилфосфино)пропан (Acros).…”