text: Monomeric metal carbyne complexes exhibit fairly linear M–C–R linkages according to X-ray crystallography. The M–C distances are typically shorter than the M–C bonds found in metal carbenes. The bond angle is generally between 170° and 180° Analogous to Fischer and Schrock carbenes; Fischer and Schrock carbynes are also known. Fischer carbynes usually have lower oxidation state metals and the ligands are π-accepting/electron-withdrawing ligands. Schrock carbynes on the other hand typically have higher oxidation state metals and electron-donating/anionic ligands. In a Fischer carbyne the C-carbyne exhibits electrophilic behavior while Schrock carbynes display nucleophilic reactivity on the carbyne carbon Carbyne complexes have also been characterized by many methods including infrared Spectroscopy, Raman spectroscopy. Bond lengths, bond angles and structures can be inferred from these and other analytical techniques.
  Metal carbyne complexes also exhibit a large trans effect, where the ligand opposite the carbyne is typically labile.