Ylide Ligand Properties and Coordination Modes

The above-mentioned features of ylides, together with the ability to form ylide anions, and their ease of synthesis make them exciting and versatile ligands for transition metal chemistry [8]. Ylides have outstanding potential with respect to fhe formation of transition metal-carbon bonds, because a major reaction path for fhe decomposition of such moieties, i.e. j5-H ehmination, is blocked by the phospho-nium group, a significant difference in comparison wifh simple alkyl complexes [Eqs. (2) and (3) Fig. 1.1]. 

Ylides mosfly act as u-carbon ligands wifh practically no back-bonding characteristics. A variety of ylide-metal structural arrangements have been synfhetically accomplished. The organometallic ylide chemistry (Fig. 1.1) covers most of fhe d-block and some f-block as well as main group elements. It includes mono-, di- and trinuclear 

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