Transition metal alkene complex

Keto-alkenes are tetrahapto ligands that stabilize highly unsaturated low valent metals as found in (benzylideneacetone)iron tricarbonyl and tris(dibenzylideneacetone)dipalladium(0).

This interaction is reinforced by back bonding that entails sharing of electrons in other metal orbitals into the empty pi-antibonding level on the alkene.

Late metals (Ir(I), Pt(II)), which are poorer pi-donors, tend to engage the alkene as a Lewis acid–Lewis base interaction.

Separation technologies often rely on facilitated transport membranes containing Ag+ or Cu+ salts that reversibly bind alkenes.

[6] In argentation chromatography, stationary phases that contain silver salts are used to analyze organic compounds on the basis of the number and type of alkene (olefin) groups.

Ethylene affects the ripening of fruit and flowers by complexation to a Cu(I) center in a transcription factor.

Structure of (acac)Rh(C 2 H 4 )(C 2 F 4 ), distances (red) in picometers. [ 3 ]
The mechanism of the Wacker process involves Pd-alkene complex intermediates.
The mechanism of the Wacker process involves Pd-alkene complex intermediates.