Organometallic Compounds of the Main Group Elements

CHAPTER 12 Organometallic Compounds of the Main Group Elements... 

Essentially similar methods can be employed to prepare non-homoleptic organometallic compounds of the Main Group elements, EXmR etc. Some procedures unique to particular classes of compound are important, for example the mercuration of aromatic hydrocarbons by mercuric acetate ... 

The spectra of many organometallic compounds of the main group elements have been measured but a discussion of these results does not fall within the scope of this review. 

The most important complexes involving carbon-containing ligands in which carbon is bound to the metal are discussed separately those of carbon monoxide in Chapter 16, organometallic compounds of transition elements, and organometallic compounds of the main group elements in the corresponding chapters. 

Haaland, Organometallic Compounds of the Main Group Elements, in Stereochemical Applications of Gas-Phase Electron Diffraction, Part B, Structural Information for Selected Classes of Compounds, Eds. I. Hargittai and M. Hargittai, VCH Publishers, Weinheim, 1988. 

Some organometallic compounds of the main group elements may play the role of nucleophilic reagents. They react with coordinated allyl groups to give olefin derivatives [see equation (7.90)]. 

Ziegler-Natta-type catalysts are composed of complexes of the transition metals and organometallic compounds of the main group elements (usually those of groups 1, 2, and 13) MX +M R X where M is the transition metal of groups 3-10,... 

The most commonly used transition metal compounds are those of titanium, vanadium, chromium, and zirconium. The transition metal-carbon bond is formed by the action of an organometallic compound of the main group elements, leading to the formation of the complex which has catalytic properties. 

Eisch, J.J. and Gilman, H. (1960) Preparation of organometallic compounds of the main group elements a general review. Adv. Inorg. Chem. Radiochem., 2. 

Partly from lack of space, we have restricted our general discussion of the use of the literature and information retrieval services. The comments of Bruce and the references he cites are valuable here. Also we have not given statistical analyses of published papers. The relative importance of literature on various elements is, however, apparent from our book lists and the appendix of review articles clearly silicon and boron compounds have been most thoroughly studied. We broadly endorse the comments of Bruce about the relative importance of various journals in organometallic chemistry—except to add that the organometallic chemistry of the Main Group elements has been particularly widely investigated in the USSR. Books and papers from Russian authors are therefore of considerable importance. 

Earlier published reactions of PH3 with organometallic compounds are covered in Phosphor C, 1965, p. 48. A large series of reactions of PH3 with certain organyl-substituted compounds of the main group elements which were claimed to be suitable for the deposition of a variety of films or layers mainly of phosphides on different substrates are covered in Section 1.3.1.6, pp. 293/308. 

In this chapter, we have briefly surveyed the chemistry of organometallic compounds of some of the main group elements. Additional aspects of organometallic chemistry will be illustrated in Chapters 14 and 15, especially for the nonmetallic elements in these groups. Organometallic chemistry is a vast and important area, the relevance of which can be appreciated only by consulting additional references. 

Organometallic compounds are those in which there is a metal-carbon bond. According to this definition, in the case of transition metals, this group of compounds includes not only metal carbonyls, olefin complexes, cyclopentadienyl, and other 7r-complexes, but also cyanide and fulminate compounds. Certain difficulties arise in defining the metal of the main group elements. Usually, organometallic compounds are comprised not only of compounds of typical metals, but also of metalloids such as boron, silicon, phosphorus, arsenic, selenium, etc. In compounds of metals as well as in those of metalloids, the bond is generally polarized as follows C. Consequently, the... 

As was shown in Chapter 2, organometallic compounds of the most electropositive elements, e.g. Li, Mg, react with halides of less electropositive main group elements by transfer of the organic group ... 

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