Rare-earth metal bis(tetramethylaluminate) complexes supported by a sterically crowded triazenido ligand

Dalton Transactions : an International Journal of Inorganic Chemistry
Rannveig LitlabøReiner Anwander

Abstract

Complexes [NNN]Ln(AlMe(4))(2) (Ln = Y, La, Nd, Lu) bearing the sterically demanding aryl-substituted triazenido ligand [(Tph)(2)N(3)] (Tph = [2-(2,4,6-iPr(3)C(6)H(2))C(6)H(4)]) can be obtained from homoleptic complexes Ln(AlMe(4))(3) in moderate yields, both via protonolysis with [(Tph)(2)N(3)]H and a salt metathesis reaction pathway utilizing [(Tph)(2)N(3)]K. In the solid state the Y and Lu derivatives are isostructural, with both tetramethylaluminate groups coordinated in an eta(2) fashion, while one of the [AlMe(4)] ligands of the Nd derivative features a distorted eta(2) coordination mode. Due to the high affinity of the triazenido ligand toward the more Lewis-acidic and harder aluminium cation compared to the softer rare-earth metal centres, ligand redistribution is observed in solution and formation of byproduct [(Tph)(2)N(3)]AlMe(2) is prominent. While the monoanionic triazenido ligand coordinates the rare-earth metal centres in an asymmetrical syn/anti fashion, it adopts an almost symmetric syn/syn configuration in the aluminium complex. Attempts were also made to produce putative dimethyl complexes {[(Tph)(2)N(3)]LnMe(2)} (Ln = Y, Lu) via cleavage of the aluminate moieties with diethyl ether. Furthermore, the intrinsic...Continue Reading

References

Feb 12, 2000·Angewandte Chemie·R Kempe
Mar 7, 2002·Journal of the American Chemical Society·Paul G HayesRobert McDonald
Jun 13, 2002·Chemical Reviews·Frank T EdelmannHerbert Schumann
Jan 9, 2003·Chemical Reviews·Vernon C Gibson, Stefan K Spitzmesser
Jul 30, 2004·Journal of the American Chemical Society·Sergio BambirraBart Hessen
Jul 23, 2005·Angewandte Chemie·H Martin DietrichReiner Anwander
Jun 15, 2006·Chemical Reviews·Peter M ZeimentzJun Okuda
Aug 2, 2006·Inorganic Chemistry·Hyui Sul Lee, Mark Niemeyer
Oct 24, 2007·Dalton Transactions : an International Journal of Inorganic Chemistry·Erwan Le RouxReiner Anwander
Jan 23, 2008·Chemical Communications : Chem Comm·Melanie ZimmermannReiner Anwander
Oct 31, 2008·Angewandte Chemie·Rannveig LitlabøReiner Anwander
Dec 18, 2009·Inorganic Chemistry·Hyui Sul Lee, Mark Niemeyer

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Citations

Apr 7, 2011·Journal of the American Chemical Society·Giovanni OcchipintiReiner Anwander
Sep 7, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Philipp EhniSabine Laschat
Aug 20, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Anthony R LeverettAlasdair I McKay

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