Nd, La and Y triphosphates were prepared via the reaction of potassium ionol ethyl phosphate with the corresponding lanthanide nitrates or chlorides in water. According to the X-ray diffraction data, the recrystallised reaction products were dimers. The products did not contain water, were readily soluble in hydrocarbon solvents and demonstrated promising catalytic properties in the polymerisation of butadiene and DL-dilactide.

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O)], was formed in the reaction between 4-tert-butyl-2,6-bis(diphenylmethyl)phenol and triethylaluminum in the presence of THF (THF is tetrahydrofuran) and recrystallized from hexane. The structure has monoclinic (P2 1 /n) symmetry with a single Al atom in the asymmetric unit. The terminal C atom of one ethyl substituent is nearly equally disordered over two positions. The complex possesses catalytic activity in the ring-opening polymerization of "-caprolactone.