L5 Metal-Metal multiple bonds, alkyl complexes and catalytic intro

Some multiple metal-metal bonded complexes

Orbital interaction within metal-metal multiple bonds

Changes in energy of the delta orbitals in M₂L₈ and M₂L₆ species

in the L₈ case, they both get used to form sigma bonds. In L₆ some delta orbitals still remain but some are used to form sigma bonds

Quadruple bond orbital interactions and geometry

Triple bonds orbital interactions and geometries

Triple bonds in M₂L₆

Quintuple bond

Transition metal alkyls

Synthesis of Transition Metal-Alkyls - transmetallation

Synthesis of Transition Metal-Alkyls - oxidative addition

Synthesis of Transition Metal-Alkyls - alkylation by R⁺

Bonding in transition metal-alkyls

Reactivity of transition metal-alkyls - beta hydride elimination

Reactivity of transition metal-alkyls - reductive elimination and oxidative addition

Reactivity of transition metal-alkyls - migratory insertion

Dihydrogen complexes

“Goldilocks” effect for H₂ binding

Synthesis of dihydrogen complexes

Wilkinson’s catalyst - a homogeneous hydrogenation catalyst

Hydrogenation catalytic cycle

Hydroformylation catalytic cycle using another Rh catalyst

Key points allowing these catalytic cycles to function