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Internal alkynes feature carbon substituents on each acetylenic carbon. Symmetrical examples include diphenylacetylene and 3-hexyne. They may also be asymmetrical, such as in 2-pentyne. Terminal alkynes have the formula RC≡CH, where at least one end of the alkyne is a hydrogen atom. An example is methylacetylene (propyne using IUPAC ...
Transition metal alkyne complexes are often formed by the displacement of labile ligands by the alkyne. For example, a variety of cobalt-alkyne complexes arise by the reaction of alkynes with dicobalt octacarbonyl. [2] Co 2 (CO) 8 + R 2 C 2 → (R 2 C 2)Co 2 (CO) 6 + 2 CO. Many alkyne complexes are produced by reduction of metal halides: [3]
Propyne (methylacetylene) is an alkyne with the chemical formula CH 3 C≡CH. It is a component of MAPD gas—along with its isomer propadiene (allene), which was commonly used in gas welding. Unlike acetylene, propyne can be safely condensed. [3]
Acetylene (systematic name: ethyne) is the chemical compound with the formula C 2 H 2 and structure H−C≡C−H. It is a hydrocarbon and the simplest alkyne. [8] This colorless gas is widely used as a fuel and a chemical building block. It is unstable in its pure form and thus is usually handled as a solution. [9]
Large alkyne-containing carbocycles may be virtually unstrained, while the smallest constituents of this class of molecules may experience so much strain that they have yet to be observed experimentally. [1] Cyclooctyne (C 8 H 12) is the smallest cycloalkyne capable of being isolated and stored as a stable compound. [2]
The alkyne representation of benzyne is the most widely encountered. Arynes are usually described as having a strained triple bond. [6]Geometric constraints on the triple bond in benzyne result in diminished overlap of in-plane p-orbitals, and thus weaker triple bond. [7]
Alkyne derivatives (7 C, 86 P) Alkynyl groups (4 P) P. Polyynes (1 C, 9 P) Pages in category "Alkynes" The following 27 pages are in this category, out of 27 total.
2-Pentyne, an organic compound with the formula CH 3 CH 2 C≡CCH 3 and is an internal alkyne. It is an isomer of 1-pentyne, a terminal alkyne. 1-Pentyne. Synthesis