Metal-hydrocarbon n complexes

This is one of two articles in this volume concerned with the borane-carborane structural pattern. In the other (see Williams, this volume, p. 67) Williams has shown how the pattern reflects the coordination number preferences of the various atoms involved. The purpose of the present article is to note some bonding implications of the pattern, and to show its relevance to a wide range of other compounds, including metal clusters, metal-hydrocarbon n complexes, and various neutral or charged hydrocarbons. 

Figure 1.4. Mixed metal-carbon cluster compounds (metal-hydrocarbon n complexes) ( denotes hypercarbons).

These are not isolated examples. In metal-hydrocarbon n complexes in general, of which ferrocene is but one example, unsaturated organic groups or molecules coordinate with metal atoms by using their carbon-carbon... 

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