Abstract
The lanthanide compounds [(Me 3Si) 2N] m Ln[Sn(CH 2SiMe 3) 3] 3— m ·DME (Ln Pr, Nd; m 0, 2, 3) add two molecules of carbon dioxide per lanthanide atom in 1,2-dimethoxyethane (DME) at room temperature and atmospheric pressure. According to the IR spectroscopic data the molecules of CO 2 in the complexes obtained are retained in their original form. One equivalent of CO 2 was evolved on heating [(Me 3SiCH 2) 3Sn] 3Pr·2CO 2·DME at 130–140°C in the absence of a solvent. The other complexes did not evolve CO 2 on heating. The hydrolysis of the complexes in the open system leads to the evolution of both CO 2 molecules. Upon hydrolysis in the closed system carbon dioxide remains in the product containing praseodymium (Me 3SiCH 2) 3SnPr(OH) 2·2CO 2.
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