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Additional recommended knowledge
A carbene can occur as a short-lived reactive intermediate. For instance, fluoromethylidyne (CF) can be detected in the gas phase by spectroscopy as an intermediate in the flash photolysis of CHFBr2. 
Carbynes are incorporated in metal carbyne complexes  For example in [WBr(CO)2(2,2'-bipyridine)C-Aryl] and [WBr(CO)2(PPh3)2C-NR2]. An example of how to make such a compound would be to react [W(CO)6] with Lithium diisopropylamide to form [(iPr2N)(OLi)C=W(CO)5]. This is then reacted with either oxalyl bromide or Br-Br-PPh3 followed by triphenyl phosphine. Another method is to treat a methoxy metal carbene with a lewis acid. 
Form of carbon
Carbyne, or polyyne, is also another name for Linear Acetylenic Carbon  (LAC) the carbon allotrope that has the chemical structure  -(C:::C)n- .Carbon in this modification is linear with sp orbital hybridisation, and is a polymer with alternating single and triple bonds. This type of carbyne is of considerable interest to nanotechnology as its Young's modulus is forty times that of the hardest known material - diamond .
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Carbyne". A list of authors is available in Wikipedia.|