Astronomical detection of the cyanobutadiynyl radical C 5 N
نویسندگان
چکیده
We report the detection of the elusive carbon-chain radical C 5 N in the dark cloud TMC1 and its tentative detection in the circumstellar envelope IRC+10216. C 5 N appears to be two orders of magnitude less abundant than the related molecule HC 5 N and much less abundant than expected from current gas phase chemistry models. In comparison the HC 3 N to C 3 N abundance ratio is of the order of 10, in reasonable agreement with model predictions. We have also detected in IRC+10216 two lines arising from the C 3 H radical in its excited ν 4 = 1 state.
منابع مشابه
The preparation, characterisation and electronic structures of 2,4-pentadiynylnitrile (cyanobutadiynyl) complexes.
Convenient preparative routes to mononuclear ruthenium complexes containing the 2,4-pentadiynylnitrile, or cyanobutadiynyl, ligand are described. The electronic properties of the [C(5)N](-) ligand are closely related to those of not only the cyanide ([CN](-)) and 2-propynylnitrile or cyanoacetylide ([C≡CC≡N](-)) ligands, but also those of the isoelectronic polyynyl ([{C≡C}(n)R](-)) ligands.
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