Abstract
The complexation of triethylene glycol (EO3) with the earlier lanthanide(III) chlorides has been investigated in 1/1 and 10/1 stoichiometries and with the addition of LiCl. Two well resolved crystalline forms of La 3+ and Ce 3+ have been isolated and structurally characterized: [MCl(OH 2)(EO3) 2]Cl 2 and [MCl 2(OH 2) 2(EO3)] 2Cl 2(MLa, Ce). The former are ten-coordinate bicapped square antiprismatic while the latter are dimers of nine-coordinate tricapped trigonal prisms. A third disordered crystalline form has been isolated containing the same dimeric cation above and a disordered aquo/chloro metal anion. To round out our structural characterization of the series of lanthanide(III) chloride EO3 complexes, the crystal structures of [M(OH 2) 5(EO3)]Cl 3 (MSm, Tb), [DyCl 3(EO3)]·CH 3CN, and [TmCl 3(EO3)]·CH 3OH are also presented.
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