15041-50-6Relevant articles and documents
Heterometall-Cluster durch C-H-Spaltung cluster-gebundener Acetylenliganden
Bernhardt, Wolfgang,Vahrenkamp, Heinrich
, p. 427 - 436 (1988)
The alkyne-bridged clusters RuCo2(CO)9(μ3-RCCH) can be deprotonated with a variety of bases.With acids, the resulting acetylide-bridged clusters are reconverted into the starting materials.If the deprotonation is performed in triethylamine in presence of catalytic amounts of copper(I) iodide, the organometallic halides Cp(CO)2FeCl, Cp(CO)2RuCl, Cp(PPh3)NiCl, and Cp(CO)3MoCl are incorporated as organometallic acetylides MCCR into the clusters which contain novel RuCo2M metal frameworks.With Cp(CO)3MoCl the main reaction is a metal exchange leading to RuCoMoCp(CO)8(μ3-RCCH) which itself can be converted into the RuCoMo(μ3-RCCMo)-type cluster.These reactions provide new insight into the mechanism of metal exchange.CuI also catalyzes the alkyne-vinylidene rearrangement in these clusters.
The mechanism of the formation of silyl enol ethers from hydrosilanes and organic carbonyl compounds in the presence of cobalt carbonyls. Kinetic investigation of some reaction steps
Kovács, István,Sisak, Attila,Ungváry, Ferenc,Markó, László
, p. 1025 - 1028 (1988)
The cleavage of isobutyrylcobalt tetracarbonyl with triethylsilane gives (triethylsilyl)cobalt tetracarbonyl, isobutyraldehyde, dicobalt octacarbonyl, and the corresponding unsaturated and saturated silyl ethers. Silyl enol ether was also formed, along wi
Role of the transition metal in metallaborane chemistry. Reactivity of (Cp*ReH2)2B4H4 with BH3·thf, CO, and Co2(CO)8
Ghosh,Lei,Shang,Fehlner
, p. 5373 - 5382 (2000)
The reaction of Cp*ReCl4, [Cp*ReCl3]2, or [Cp*ReCl2]2 (Cp* = η5-C5Me5) with LiBH4 leads to the formation of 7-skeletal-electron-pair (7-sep) (Cp*ReH2)2(B2H3)2 (1) together with Cp*ReH6. Compound 1 is metastable and eliminates H2 at room temperature to generate 6-sep (Cp*ReH2)2B4H4 (2). The reaction of 2 with BH3·thf produces 7-sep (Cp*Re)2B7H7, a hypoelectronic cluster characterized previously. Heating of 2 with 1 atm of CO leads to 6-sep (Cp*ReCO)(Cp*ReH2)B4H4 (3). Both 2 and 3 have the same bicapped Re2B2 tetrahedral cluster core structure. Monitoring the reaction of 2 with CO at room temperature by NMR reveals the formation of a 7-sep, metastable intermediate, (Cp*ReCO)(Cp*ReH2)(B2H3)2 (4), which converts to 3 on heating. An X-ray structure determination reveals two isomeric forms (4-cis and 4-trans) in the crystallographic asymmetric unit which differ in geometry relative to the disposition of the metal ancillary ligands with respect to the Re-Re bond. The presence of these isomers in solution is corroborated by the solution NMR data and the infrared spectrum. In both isomers, the metallaborane core consists of fused B2Re2 tetrahedra sharing the Re2 fragment. On the basis of similarities in electron count and spectroscopic data, 1 also possesses the same bitetrahedral structure. The reaction of 2 with Co2(CO)8 results in the formal replacement of the four rhenium hydrides with a 4-electron Co2(CO)5 fragment, thereby closing the open face in 2 to produce the 6-sep hypoelectronic cluster (Cp*Re)2Co2(CO)5B4H4 (5). These reaction outcomes are compared and contrasted with those previously observed for 5-sep (Cp*Cr2)2B4H8.
A novel coordinated inorganic benzene: Synthesis and characterization of {η5-C5Me5Re}2{μ-η6:η6-B4H4CO2(CO)5} [24]
Ghosh, Sundargopal,Shang, Maoyu,Fehlner, Thomas P.
, p. 7451 - 7452 (2007/10/03)
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Synthesis of the square-bipyramidal cluster 4-SiMe)2(CO)11> by two routes and its reaction with GeMe2H2. The crystal structures of 4-SiMe)2(CO)11> and 4-SiMe)2(CO)10>
Anema, Skelte G.,Lee, Siew Kim,Mackay, Kenneth M.,Nicholson, Brian K.
, p. 211 - 218 (2007/10/02)
4-SiMe)2(CO)11> (1a) is the major product from the reaction of with (synthesised from SiMeH2Cl and Na2).An alternative, quantitative synthesis of 1a is from SiMeH3 and , 1a reacts with an
