Metal aryloxides homoleptic complexes

Lanthanide aryloxides have proved to be excellent precursors to homoleptic lanthanide alkyls (B, Eq. 13) [140], The reaction can be conducted in non-polar solvents because of the good solubility of the starting compounds. The formation of insoluble alkali metal aryloxides is the driving force (kinetic control). Complexes derived from aliphatic alcohols [141] and acetylacetonates [131] are... 

Unusual coordination around potassium was observed in the 2-dimensional layered structure of the ate complex K[Cp2Nd(/i-OC6H3Me2-2,6)2] n [208]. No close K O contact was found, however, aryloxide ligands bridge the metal centers through arene interactions as in homoleptic ate complexes [69]. 

This method has been used to produce a variety of homoleptic aiyloxide complexes and has also been applied to the synthesis of mixed alkyl, aryloxide derivatives of metals. Partial substitution is typically achieved by simple control of the stoichiometry or by using sterically demanding aryloxides (Eqs 6.49, 6.50, and 6.51 ). 

---