Cationic rare-earth-metal methyl complexes: a new preparative access exemplified for Y and Pr

Nieland A, Mix A, Neumann B, Stammler H-G, Mitzel NW (2010)
DALTON TRANSACTIONS 39(29): 6753-6760.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
A new procedure for the generation of cationic methyl complexes of rare-earth metals has been developed for yttrium and praseodymium as two examples from the rare-earth series. The reactions of the rare-earth-metal tetramethylaluminates [Ln(AlMe4)(3)] of yttrium and praseodymium with three differently sized crown ethers in thf, namely [12]crown-4, [15]crown-5 and [18]crown-6, respectively, led to the compounds [YMe([12]crown-4)(2)](2+)[AlMe4](-)(2) (1), [PrMe([12]crown-4)(2)](2+)[AlMe4](-)(2) (2), [YMe([15]crown-5)(thf)(2)](2+)[AlMe4](-)(2) (3), [Pr([15]crown-5)(2)](3+)[AlMe4](-)(3) (4), [YMe([18]crown-6)(thf)](2+)[AlMe4](-)(2) (5) and [PrMe([18]crown-6)(thf)(2)](2+) [AlMe4](-)(2) (6). With the exception of 4, all compounds contain molecular di-cations with a Ln-CH3 unit bonded to one (3, 4, 6) or two (1, 2) crown-ether molecules. The compounds were characterised by determination of their crystal structures, by elemental analyses and in the case of the yttrium compounds by variable temperature NMR spectroscopy. The latter gives insights into molecular dynamic processes and methyl group exchange between cations and anions in solution.
Erscheinungsjahr
2010
Zeitschriftentitel
DALTON TRANSACTIONS
Band
39
Ausgabe
29
Seite(n)
6753-6760
ISSN
1477-9226
eISSN
1477-9234
Page URI
https://pub.uni-bielefeld.de/record/1794956

Zitieren

Nieland A, Mix A, Neumann B, Stammler H-G, Mitzel NW. Cationic rare-earth-metal methyl complexes: a new preparative access exemplified for Y and Pr. DALTON TRANSACTIONS. 2010;39(29):6753-6760.
Nieland, A., Mix, A., Neumann, B., Stammler, H. - G., & Mitzel, N. W. (2010). Cationic rare-earth-metal methyl complexes: a new preparative access exemplified for Y and Pr. DALTON TRANSACTIONS, 39(29), 6753-6760. doi:10.1039/c002252g
Nieland, A., Mix, A., Neumann, B., Stammler, H. - G., and Mitzel, N. W. (2010). Cationic rare-earth-metal methyl complexes: a new preparative access exemplified for Y and Pr. DALTON TRANSACTIONS 39, 6753-6760.
Nieland, A., et al., 2010. Cationic rare-earth-metal methyl complexes: a new preparative access exemplified for Y and Pr. DALTON TRANSACTIONS, 39(29), p 6753-6760.
A. Nieland, et al., “Cationic rare-earth-metal methyl complexes: a new preparative access exemplified for Y and Pr”, DALTON TRANSACTIONS, vol. 39, 2010, pp. 6753-6760.
Nieland, A., Mix, A., Neumann, B., Stammler, H.-G., Mitzel, N.W.: Cationic rare-earth-metal methyl complexes: a new preparative access exemplified for Y and Pr. DALTON TRANSACTIONS. 39, 6753-6760 (2010).
Nieland, Anja, Mix, Andreas, Neumann, Beate, Stammler, Hans-Georg, and Mitzel, Norbert W. “Cationic rare-earth-metal methyl complexes: a new preparative access exemplified for Y and Pr”. DALTON TRANSACTIONS 39.29 (2010): 6753-6760.

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