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Microwave‐Assisted Generation of Lanthanide( II ) Halides in THF and Simple Quantitative Determination
Author(s) -
Dahlén Anders,
Hilmersson Göran
Publication year - 2004
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200400309
Subject(s) - chemistry , lanthanide , halide , ytterbium , samarium , reagent , amine gas treating , inorganic chemistry , nuclear chemistry , analytical chemistry (journal) , organic chemistry , ion , doping , physics , optoelectronics
Lanthanide( II ) reagents (SmI 2 , SmBr 2 , YbI 2 , EuI 2 ) have been prepared rapidly in high yields using microwave‐assisted heating. Samarium diiodide is obtained as a saturated solution in THF (0.13 M ) within 5 min and ytterbium diiodide (0.065 M ) after 45 min. A simple method for quantitative determination of LnX 2 in THF is also described by utilizing the instantaneous reaction with ketones in the presence of an amine and water. This method establishes the concentration of the active single‐electron‐donor species, i.e. Ln 2+ . (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)