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- W2063877102 abstract "La[N(SiMe3)2]3 reacted with 1,3-dicyclohexylcarbodiimide in refluxing toluene to yield the mono-guanidinate complex La[CyNC(N(SiMe3)2)NCy](N(SiMe3)2)21. Compound 1 is monomeric in solution; X-ray structural analysis reveals an unassociated complex in the solid state, with a four-coordinate lanthanum center. Complex 1 reacts with 2,6-di-tert-butylphenol (2 equivalents) in cold pentane to yield the bis(phenoxide) complex La[CyNC(N(SiMe3)2)NCy](OC6H3tBu2-2,6)2. X-Ray analysis indicates a similar structure to that of 1, with a four-coordinate lanthanum center coordinated by a single guanidinate ligand and two phenoxide groups. This compound catalyses the ring-opening polymerization of D,L-lactide to polylactide. Although high molecular weight polymer is obtained, polydispersities are broad and no control over the stereochemistry of the polymer is observed." @default.
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- W2063877102 date "2001-01-01" @default.
- W2063877102 modified "2023-10-12" @default.
- W2063877102 title "Mono-guanidinate complexes of lanthanum: synthesis, structure and their use in lactide polymerization" @default.
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- W2063877102 doi "https://doi.org/10.1039/b008164g" @default.
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