Organometallic Compounds of Group IIIA Metals

An unusual type of organometallic compound of beryllium is that in which it is coordinated to a cyclopentadienyl ring  

In addition to the hydrogen compound, others have been prepared that contain a halogen or a methyl group. 

The organometallic chemistry of other members of group IIIA is relatively much less important than that of aluminum. There is an extensive organic chemistry of aluminum, and some of the compounds are commercially important. For example, triethylaluminum is used in the Ziegler-Natta process for polymerization of alkenes (see Chapter 22). 

Aluminum alkyls react with many substances and are spontaneously flammable in air, 

Aluminum alkyls can be prepared in several ways. In one process, aluminum reacts with alkyl halides to produce R3A12C13 (known as the sesquichloride), 

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