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The nomenclature of the metal carbonyls depends on the charge of the complex, the number and type of central atoms, and the number and type of ligands and their binding modes. They occur as neutral complexes, as positively-charged metal carbonyl cations or as negatively charged metal carbonylates.
In this model, bonding between a CO ligand and the metal center is described using the Dewar-Chatt-Duncanson model. The CO ligand binds to the metal through σ-donation, and the metal center engages in π back-donation with the carbonyl ligand. The alkaline earth octacarbonyl complexes contain a metal center with a formal oxidation state of zero.
Classified as metal carbonyl cluster, it is a dark orange-colored solid that is soluble in nonpolar organic solvents. The compound serves as a precursor to other organoruthenium compounds . Structure and synthesis
Hexadecacarbonylhexarhodium is a metal carbonyl cluster with the formula Rh 6 (CO) 16. It exists as purple-brown crystals that are slightly soluble in dichloromethane and chloroform. [1] It is the principal binary carbonyl of rhodium.
This metal carbonyl is used as a reagent and catalyst in organometallic chemistry and organic synthesis, and is central to much known organocobalt chemistry. [2] [3] It is the parent member of a family of hydroformylation catalysts. [4]
In organic chemistry, a carbonyl group is a functional group with the formula C=O, composed of a carbon atom double-bonded to an oxygen atom, and it is divalent at the C atom. It is common to several classes of organic compounds (such as aldehydes , ketones and carboxylic acid ), as part of many larger functional groups.
Tungsten hexacarbonyl (also called tungsten carbonyl) is an organometallic compound with the formula W(CO) 6. This complex gave rise to the first example of a dihydrogen complex. [2] Like its chromium and molybdenum analogs, this colorless compound is noteworthy as a volatile, air-stable derivative of tungsten in its zero oxidation state.
The Rh 4 and Ir 4 clusters are more thermally robust than that of the Co 4 compound, reflecting the usual trend in the strengths of metal-metal bond for second and third row metals vs those for the first row metals. There has been disagreement between the theoretically predicted and experimental structure of tetracobalt dodecacarbonyl.