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- Cyanopolyyne abstract "The cyanopolyynes are a group of chemicals with the chemical formula HCnN (n=3,5,7, ...). Structurally they are acetylene groups covalently bonded in a string with a cyano group attached at the end. A rarely seen group of molecules both due to the difficulty in production and the unstable nature of the paired groups, the cyanopolyynes have been observed as a major organic component in interstellar clouds. This is believed to be due to the hydrogen scarcity of some of these clouds. Interference with hydrogen is one of the reason for the molecule's instability due to the energetically favorable dissociation back into hydrogen cyanide and acetylene. Cyanopolyynes were first discovered in interstellar molecular clouds in 1971 using millimeter wave and microwave telescopes. Since then many higher weight cyanopolyynes such as HC7N and HC11N have been discovered, although some of these identifications have been disputed. Other derivatives such as methycyanoacetylene CH3C3N and ethylcyanoacetylene CH3CH2C3N have been observed as well. The simplest example is cyanoacetylene, H−C≡C−C≡N. Cyanoacetylene is more common on earth and it is believed to be the initial reagent for most of the photo-catalyzed formation of the interstellar cyanopolyynes. Cyanoacetylene is one of the molecules that was produced in the Miller–Urey experiment and is expected to be found in carbon-rich environments.Identification is made through comparison of experimental spectrum with spectrum gathered from the telescope. This is commonly done with measurement of the rotational constant, the energy of the rotational transitions, or a measurement of the dissociation energy. These spectra can either be generated ab initio from a computational chemistry program or, such as with the more stable cyanoacetylene, by direct measurement of the spectra in an experiment. Once the spectra are generated, the telescope can scan within certain frequencies for the desired molecules. Quantification can be accomplished as well to determine the density of the compounds in the cloud.".
- Cyanopolyyne wikiPageID "25584893".
- Cyanopolyyne wikiPageRevisionID "605584863".
- Cyanopolyyne hasPhotoCollection Cyanopolyyne.
- Cyanopolyyne subject Category:Alkynes.
- Cyanopolyyne subject Category:Cyanides.
- Cyanopolyyne type Abstraction100002137.
- Cyanopolyyne type Acetylene114600742.
- Cyanopolyyne type AliphaticCompound114601294.
- Cyanopolyyne type Alkynes.
- Cyanopolyyne type Chemical114806838.
- Cyanopolyyne type Compound114818238.
- Cyanopolyyne type Cyanides.
- Cyanopolyyne type Material114580897.
- Cyanopolyyne type Matter100020827.
- Cyanopolyyne type Nitrile114827346.
- Cyanopolyyne type OrganicCompound114727670.
- Cyanopolyyne type Part113809207.
- Cyanopolyyne type PhysicalEntity100001930.
- Cyanopolyyne type Relation100031921.
- Cyanopolyyne type Substance100019613.
- Cyanopolyyne comment "The cyanopolyynes are a group of chemicals with the chemical formula HCnN (n=3,5,7, ...). Structurally they are acetylene groups covalently bonded in a string with a cyano group attached at the end. A rarely seen group of molecules both due to the difficulty in production and the unstable nature of the paired groups, the cyanopolyynes have been observed as a major organic component in interstellar clouds. This is believed to be due to the hydrogen scarcity of some of these clouds.".
- Cyanopolyyne label "Cyanopolyyne".
- Cyanopolyyne label "Cyanopolyyne".
- Cyanopolyyne sameAs Cyanopolyyne.
- Cyanopolyyne sameAs m.09rvr0v.
- Cyanopolyyne sameAs Q786520.
- Cyanopolyyne sameAs Q786520.
- Cyanopolyyne sameAs Cyanopolyyne.
- Cyanopolyyne wasDerivedFrom Cyanopolyyne?oldid=605584863.
- Cyanopolyyne isPrimaryTopicOf Cyanopolyyne.