Tri-isobutyl aluminium

Tri(isobutyl)aluminium has been used for the asymmetrisation of both... 

Decalin derivatives were obtained from cis,ci5-cyclodeca-l,6-diene on bromination with one mole of bromine. Tri-isobutyl aluminium catalysed the rearrangements of CIS,trans-cyclodeca-1,5-diene and 9-methyl- and 9-phenyl-cis,trans-cyclodeca-1,5-dienes to ds-1-methyleneperhydroindan and mixtures of methyl- and phenyl-ds-1-methyleneperhydroindans, respectively. ... 

If now, a stereoregular polymer undergoes a chemical reaction or interaction, it will be difficult to explain optical activity changes because chemical reactions perturb not only the chromophores but also the local conformations of monomeric units and, consequently, the macromolecular conformations. There is only a few synthetic stereoregular optically active polymers the optical activity of which has been followed during a chemical reaction. The more elaborated example is surely the complexation of stereoregular optically active poly alkyl vinyle the rs by tri-isobutyl-aluminium [31] ... 

Pure aluminium does not undergo this reaction. A trace of transition metal impurity, generally titanium, is a necessary catalyst. Tri-isobutyl-aluminium is normally made in a single-stage process in which the metal... 

The synthesis of aluminium alkyls from metal, hydrogen, and olefin has been mentioned briefly in Chapter 2, and is used on a far bigger scale than the processes involving methyl or ethyl chloride, mainly for the manufacture of triethyl-, tri-isobutyl-, and to a lesser extent of tri- -propyl-aluminium. 

---