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Complexes of n and π Donors with Transition Metal Acceptors

  • D. A. Duddell
Chapter

Abstract

The primary objective of this chapter is to illustrate the many applications of vibrational spectroscopy to the study of transition metal complexes. At the same time, the results obtained from other investigations are discussed when they have particular bearing on the vibrational studies. It is hoped that none of the work discussed has been subsequently disproven, except when this is pointed out in the text, but in several cases interpretations are presented which can only be considered as tentative suggestions from which it is hoped a better understanding will emerge. An attempt has been made to emphasise the relation between vibrational spectra and the nature of the bonding. In particular, little mention is made of purely stereochemical investigations (this aspect being discussed to some extent in section 2.3.3). This is partly a matter of personal choice but also partly justified for two reasons. First, the complexes can usually be isolated in crystalline form and therefore their structures can be determined by X-ray crystallography. Secondly, the determination of the stereochemistry of a complex of the common type Dn-MXm by vibrational spectroscopy is usually best approached by considering the bands arising from the MX stretching modes (or XY stretching modes in complexes of the type Dn-M(XY)m) and is therefore a general method which does not require special discussion in the present context. The stereochemical investigations which are discussed are either those relating to non-rigid structures or those where the stereochemistry changes from solid to solution. The donors that have been chosen for discussion are considered to be a representative selection illustrating the different possible kinds of donor-acceptor interaction but the length at which they are discussed naturally reflects the volume of research published in each case. On the other hand, no attempt has been made to treat the transition metal acceptors systematically. The investigations so far reported have concentrated very heavily on the relatively inert complexes of metal ions with d6, d8 or d10 electronic configurations and this is reflected in the content of the chapter.

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© Springer Science+Business Media New York 1973

Authors and Affiliations

  • D. A. Duddell
    • 1
  1. 1.Chemistry DepartmentCity of Leeds and Carnegie CollegeLeedsUK

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