Alkyne complexes

Alkyne complexes - also termed, not entirely correct acetylenes, are organometallic compounds of the π-complex group, where there is at least one coordination bond formed by the lateral deposition of carbon-carbon triple-carbon (C≡C) and orbital d transition metal. Alkandium ligands are not only "pure" alkyne but also all derivatives thereof capable of forming π-d bonds between C≡C moieties and the central metal of the complex. receiving

In general, alkyne complexes are obtained by exchanging with other ligands:

Sometimes alkyne complexes are also formed by intramolecular rearrangement: Properties

The properties of alkyne complexes are very close to the alkene complexes. However, they are more reactive, have the ability to deliver variable numbers of electrons to the central metal atom and to create bridges:

Alkyne bridges - like the π-d bonds in alkene complexes, undergo chemical resonance, with three different resonance structures in them:

The most important practical reason for alginate ligand reactions is the spontaneous jump of the hydride ligand to the alkyne ligand, which is a key step in the catalytic cycle in the selective hydrogenation of acetylene to ethylene, which is the primary way of obtaining ethylene in the industry.

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