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Cyclopentadiene is an organic compound with the formula C5H6. It is often abbreviated CpH because the cyclopentadienyl anion is abbreviated Cp−.
Robert Howard Crabtree is a British-American chemist. He is serving as Conkey P. Whitehead Professor Emeritus of Chemistry at Yale University in the United States. He is a naturalized citizen of the United States. Crabtree is particularly known for his work on "Crabtree's catalyst" for hydrogenations, and his textbook on organometallic chemistry.
Philip Patrick Power is a Distinguished Professor of Chemistry at the University of California, Davis. He has contributed to the synthesis, structure, and physical and chemical characterization of inorganic and organometallic compounds. His research focuses on low-coordinate main group and transition metal compounds. Much of this work hinges on the use of sterically crowded ligands to stabilize unusual geometries.
Malcolm Leslie Hodder Green was Professor of Inorganic Chemistry at the University of Oxford. He made many contributions to organometallic chemistry.
In organic chemistry and organometallic chemistry, carbon–hydrogen bond activation is a type of organic reaction in which a carbon–hydrogen bond is cleaved and replaced with a C−X bond. Some authors further restrict the term C–H activation to reactions in which a C–H bond, one that is typically considered to be "unreactive", interacts with a transition metal center M, resulting in its cleavage and the generation of an organometallic species with an M–C bond. The intermediate of this step could then undergo subsequent reactions with other reagents, either in situ or in a separate step, to produce the functionalized product.
Hexamethyltungsten is the chemical compound W(CH3)6 also written WMe6. Classified as a transition metal alkyl complex, hexamethyltungsten is an air-sensitive, red, crystalline solid at room temperature; however, it is extremely volatile and sublimes at −30 °C. Owing to its six methyl groups it is extremely soluble in petroleum, aromatic hydrocarbons, ethers, carbon disulfide, and carbon tetrachloride.
Jean-Marie Basset is a French chemist, and is currently the director of KAUST catalysis research center.
Sodium cyclopentadienide is an organosodium compound with the formula C5H5Na. The compound is often abbreviated as NaCp, where Cp− is the cyclopentadienide anion. Sodium cyclopentadienide is a colorless solid, although samples often are pink owing to traces of oxidized impurities.
Sodium silox is the name for an organosilicon compound that serves as a source of the siloxide anion [(CH3)3C]3SiO−. Complexes of this bulky anionic ligand often adopt with low coordination numbers. Examples include Ti(silox)3, Nb(silox)3(PMe3), and [Cr(silox)3]−.
Iron tetracarbonyl dihydride is the organometallic compound with the formula H2Fe(CO)4. This compound was the first transition metal hydride discovered. The complex is stable at low temperatures but decomposes rapidly at temperatures above –20 °C.
An insertion reaction is a chemical reaction where one chemical entity interposes itself into an existing bond of typically a second chemical entity e.g.:
Chadwick Alma Tolman was an American chemist. He obtained his B.S. in Chemistry from Massachusetts Institute of Technology. He earned his Ph.D. in Chemistry as a microwave spectroscopist from U.C. Berkeley under the guidance of William Dulaney Gwinn.
Adam S. Veige is a professor of Chemistry at the University of Florida. His research focuses on catalysis and the usage of inorganic compounds, including tungsten and chromium complexes.
Kenneth G. Caulton is an American inorganic chemist who works on, and has made significant contributions to, projects dealing with transition metal hydrides. He is currently Distinguished Professor at Indiana University. Specifically, Caulton has worked on the chemistry of paramagnetic organometallic complexes, metal polyhydride complexes and the dihydrogen ligand, catalytic activation of carbon monoxide and carbon dioxide, and alkoxide chemistry. Caulton's work with transition metal complexes is ultimately aimed to create complexes that exhibit unexpected and novel reactivities.
T. Don Tilley is a professor of chemistry at the University of California, Berkeley.
Metal-ligand cooperativity (MLC) is a mode of reactivity in which a metal and ligand of a complex are both involved in the bond breaking or bond formation of a substrate during the course of a reaction. This ligand is an actor ligand rather than a spectator, and the reaction is generally only deemed to contain MLC if the actor ligand is doing more than leaving to provide an open coordination site. MLC is also referred to as "metal-ligand bifunctional catalysis." Note that MLC is not to be confused with cooperative binding.
In organometallic chemistry, a transition metal formyl complex is a metal complex containing one (usually) or more formyl (CHO) ligand. A subset of transition metal acyl complexes, formyl complexes can be viewed as metalla-aldehydes. A representative example is (CO)5ReCHO. The formyl is viewed as an X (pseudohalide) ligand. Metal formyls are proposed as intermediates in the hydrogenation of carbon monoxide, as occurs in the Fischer-Tropsch process.
Suzanne Cathleen Bart an American chemist who is a professor of inorganic chemistry at Purdue University. Her group's research focuses on actinide organometallic chemistry, and especially the characterization of low-valent organouranium complexes, actinide complexes with redox-active ligands, and discovery of new reactions that utilize these compounds. Bart's research has applications in the development of carbon-neutral fuel sources and the remediation of polluted sites.
Tetrakis(trimethylphosphine)tungsten(II) trimethylphospinate hydride (W(PMe3)4(η2-CH2PMe2)H) is an air-sensitive organotungsten complex with tungsten in the oxidation state of +2. It is an electron-rich tungsten center is and, thus, prone to oxidation. This bright-yellow complex has been used as a starting retron for some challenging chemistry, such as C-C bond activation, tungsten-chalcogenide multiple bonding, tungsten-tetrel multiple bonding, and desulfurization.
Tris(silox)tantalum, Ta(SiOtBu3)3, is an organotantalum complex bound with three siloxide (this siloxide has three tert-butyl groups attached to silicon, attached via oxygen (tBu3SiO-)) ligands. The tantalum center has a d-electron count of 2 and an oxidation state of III. The complex is trigonal planar whose point group is assigned as D3h. It is a crystalline light blue solid which forms blue-green solutions in tetrahydrofuran (THF).
References
- ↑ Wolczanski, Peter Thomas (1981). The reactivity and syntheses of mono and bis permethylcyclopentadienyl zirconium hydrides (Ph.D.). California Institute of Technology. OCLC 437056692 – via ProQuest.
