194300-61-3Relevant academic research and scientific papers
An unusual Cu2Ru2 cluster containing a tetrameric phenylethynyl ligand
Bruce, Michael I.,Zaitseva, Natasha N.,Skelton, Brian W.,White, Allan H.
, p. 1400 - 1404 (2008)
The reaction between RuCl(PPh3)2Cp* and {Cu(CCPh)}n in refluxing benzene afforded Ru2Cu2(C2Ph)5H2(Cl)(PPh3)Cp*2, which contains an unusual tetramer of the phenylethynyl group which interacts with an Ru...Cu...Cu...Ru chain. The second Ru atom is part of a ruthenocenyl moiety which interacts weakly with the second Cu atom, and bears a vinylidene which bridges an Ru-Cu vector. The structure of a second modification of Ru(C{triple bond, long}CPh)(CO)(PPh3)Cp* is also reported.
Preparation and reactions of some neutral pentamethylcyclopenta-dienylruthenium vinylidene complexes
Bruce, Michael I.,Hall, Ben C.,Zaitseva, Natasha N.,Skelton, Brian W.,White, Allan H.
, p. 1793 - 1803 (2007/10/03)
A synthesis of neutral vinylideneruthenium complexes [RuCl(C=CHR)(PPh3)(η-C5Me5)] (R = Ph, But or SiMe3) from [RuCl(PPh3)2(η-C5Me5)] and 1-alkynes has been developed. This takes advantage of the presence of two bulky ligands (PPh3 and C5Me5), which results in displacement of one PPh3 ligand (rather than chloride) and concomitant isomerisation of the 1-alkyne to vinylidene ligands. The vinylidene complexes undergo facile loss of HCl on treatment with NaOMe in the presence of a 2e donor ligand (L) to give the neutral acetyhde complexes [Ru(C≡CR)L(PPh3)(η-C5Me5)] [R = Ph, L = PPh3, CO, O2 or dppm-P; R = But, L = PPh3, CO, C2H4, dppe-P, C2(PPh2)2-P, S2, P(OMe)3 or AsPh3]; the complexes [Ru(C≡CBut)(L2)(η-C5Me5)] [L2 = dppm or PPh2CH= CHPPh2] and [Ru(S2CC≡CBut)(PPh3)(η-C 5Me5)] were also obtained. Crystal structure determinations were carried out on eleven of the complexes.
Reaction of the in-situ-generated ruthenium-acetylide complex C5Me5Ru(PPh3)C≡CPh with small molecules
Yi, Chae S.,Liu, Nianhong,Rheingold, Arnold L.,Liable-Sands, Louise M.,Guzei, Ilia A.
, p. 3729 - 3731 (2008/10/08)
A coordinatively unsaturated acetylide species C5Me5Ru(PPh3)C≡CPh (1) was generated in situ from the reaction of ruthenium-vinylidene complex C5-Me5Ru(Cl)(PPh3)=C=CHPh (2) with Et3N. The vinylidene complex 2 was prepared from the substitution reaction of C5Me5Ru(PPh3)2Cl with PhC≡CH. The in-situ-generated 1 was found to react readily with a variety of small molecules. For example, the reaction of 1 with CO produced the stable adduct C5Me5Ru(CO)-(PPh3)C≡CPh (3) in 85% yield, the structure of which was established by X-ray crystallography. The similar reactions of 1 with H2 and PhC≡CPh also gave the hydride complex C5Me5Ru(PPh3)(H)(H2C=CHPh) (4) (76% yield) and the alkyne complex C5Me5Ru(PPh3)-(PhC≡CPh)C≡CPh (5) (85% yield), respectively. The reaction of 1 with CO2 produced the carboxylate complex C5Me5Ru(PPh3)(η2-O 2CC≡CPh) (6) from the insertion of CO2 to the ruthenium-acetylide carbon bond.
