Principal Groups of Lanthanide-Based Catalysts

Thus far, the attention of researchers has mainly been attracted to the family of ion-coordination lanthanide catalysts, by which cis-polydienes can be synthesised. These catalysts can be classified into several groups [3]. 

The initial compound of the lanthanide can be obtained by reacting its halide with the corresponding organic base [5]. The research is usually carried out with complexes containing various electron donor ligands, L, such as alcohols [6, 7], cyclic ethers [8], aliphatic esters of orthophosphoric acid [9-15], aliphatic, and cyclic sulfoxides 

The use of the catalysts based on individual compounds of lanthanides of various structures may help to elucidate the nature of active centres. This explains the interest in the problems of synthesis and conversions of these compounds [31-40]. 

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