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Dalton Transactions

The international journal for inorganic, organometallic and bioinorganic chemistry



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Dalton Trans., 2006, 4155 - 4163, DOI: 10.1039/b600939e

Phenoxytriamine complexes of yttrium: synthesis, structure and use in the polymerization of lactide and -caprolactone

Ian Westmoreland and John Arnold

Reaction of the phenoxytriamine proligands 2,4-dimethyl-6-bis(2-(diethylamino)ethyl)aminomethlyphenol (H L1) and 2,4-di-tert-butyl-6-bis(2-(diethylamino)ethyl)aminomethylphenol (H L2) with Y[N(SiMe2H)2]3(THF)2 in pentane gave the momomeric complexes L1Y[N(SiMe2H)2]2 ( 1) and L2Y[N(SiMe2H)2]2 ( 2). X-Ray structural analysis of 2 shows a 5-coordinate yttrium center. The complexes 1 and 2 catalyze the ring opening polymerization of D-L-lactide and -caprolactone leading to narrow product polydispersities under mild conditions.

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