User:Benjah-bmm27/degree/3/RBB

=Organometallic Chemistry and Homogeneous Catalysis 1, RBB=

Sabatier-Senderens process

 * CO + 3H2 → CH4 + H2O
 * heterogeneous Ni catalyst
 * Named for Jean-Baptiste Senderens and Paul Sabatier, who developed it in 1902
 * Sabatier also famous for the closely-related Sabatier reaction

Fischer-Tropsch process

 * CO + H2 → C1 - C30 alkanes and alkenes
 * heterogeneous Co or Fe catalysts

Steric effects

 * Tolman cone angle

Migratory insertion and elimination

 * Agostic interaction

Lutetium hydride catalysis

 * In 1985, Tobin J. Marks found that the organolutetium compound (Cp*2LuH)2 has a far higher turnover frequency (TOF) than transition metal catalysts
 * J. Am. Chem. Soc. (1985) 107, 8111–8118.


 * Lu(III) is hard and very electropositive
 * Does not undergo oxidative addition of H2 to form Lu(V)H2
 * Lanthanide contraction makes it very hard to remove electrons from Lu(III)
 * Impractical due to extreme air and moisture sensitivity...
 * ...but it may be possible to get the same mechanism with titanocene catalysts

Alkene isomerisation

 * Linear alpha olefins

Alkene oxidation – the Wacker process

 * Wacker process

Heterogeneous catalysis

 * Ziegler–Natta catalysts: TiClx / Al-R catalysis
 * Phillips catalysts: CrOx on silica

Modern homogeneous catalysis

 * Kaminsky catalysts: metallocene-based, e.g. zirconocenes

Alkene metathesis

 * Chauvin mechanism
 * Schrock catalysts
 * Grubbs catalysts

Specific applications

 * Ring-opening metathesis polymerisation of cyclic olefins
 * Ring-closing metathesis

Step 3: metathesis

 * Typical catalysts: heterogeneous – Re2O7/SnMe4 or AlMe3 on alumina or WCl6/SnMe4

Others to sort

 * Catalysis
 * C-H bond activation
 * Olefin polymerisation
 * Vinyl polymer
 * Ziegler–Natta catalyst
 * Kaminsky catalyst
 * Olefin metathesis
 * Grubbs' catalyst
 * Alkyne metathesis
 * Alkane metathesis