Subtle Size Effects in C-H Activation Reactions of Lanthanum and Praseodymium Tetramethylaluminates by Neutral Trinitrogen Bases

Bojer D, Neumann B, Stammler H-G, Mitzel NW (2011)
European Journal of Inorganic Chemistry (25): 3791-3796.

Journal Article | Published | English

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Abstract
The reaction of Pr(AlMe(4))(3) with 1,3,5-trimethyl-1,3,5-triazacyclohexane (TMTAC) leads to the formation of two isomeric products by C-H activation of the AlMe(4)(-) ligands: [(eta(3)-TMTAC)Pr{eta(4)-(Me(3)AlCH(2)AlMe(2)CH(2)AlMe(3))}] (1), containing a linear tris(aluminate) trianion, and [(eta(3)-TMTAC)Pr(eta(4)-{CH(AlMe(3))(3)})] (2), containing a branched tris(aluminate) trianion. The analogous reaction with the more bulkily substituted 1,3,5-tri-tert-butyl-1,3,5-triazacyclohexane (TtBuTAC) leads selectively to [(eta(3)-TtBuTAC)Pr{mu(4)-(Me(3)AlCH(2)AlMe(2)CH(2)AlMe(3))}] (3). The reaction of La(AlMe(4))(3) with TtBuTAC affords [(eta(3)-TtBuTAC)La{eta(4)-(Me(3)AlCH(2)AlMe(2)CH(2)AlMe(3))}] (4). All compounds were characterised by elemental analysis and crystal-structure determination. Isomers 1 and 2 could not be separated and form a cocrystalline product with a 1/2 ratio of 1:2 with two slightly different structures of 2 (2a and 2b). In compounds 2, 3 and 4 the tris(aluminate) ligand [Me(3)AlCH(2)AlMe(2)CH(2)AlMe(3)](3-) is bonded to the lanthanide ions in an.4-mode through two CH(2) units and two terminal Me groups.
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Bojer D, Neumann B, Stammler H-G, Mitzel NW. Subtle Size Effects in C-H Activation Reactions of Lanthanum and Praseodymium Tetramethylaluminates by Neutral Trinitrogen Bases. European Journal of Inorganic Chemistry. 2011;(25):3791-3796.
Bojer, D., Neumann, B., Stammler, H. - G., & Mitzel, N. W. (2011). Subtle Size Effects in C-H Activation Reactions of Lanthanum and Praseodymium Tetramethylaluminates by Neutral Trinitrogen Bases. European Journal of Inorganic Chemistry(25), 3791-3796.
Bojer, D., Neumann, B., Stammler, H. - G., and Mitzel, N. W. (2011). Subtle Size Effects in C-H Activation Reactions of Lanthanum and Praseodymium Tetramethylaluminates by Neutral Trinitrogen Bases. European Journal of Inorganic Chemistry, 3791-3796.
Bojer, D., et al., 2011. Subtle Size Effects in C-H Activation Reactions of Lanthanum and Praseodymium Tetramethylaluminates by Neutral Trinitrogen Bases. European Journal of Inorganic Chemistry, (25), p 3791-3796.
D. Bojer, et al., “Subtle Size Effects in C-H Activation Reactions of Lanthanum and Praseodymium Tetramethylaluminates by Neutral Trinitrogen Bases”, European Journal of Inorganic Chemistry, 2011, pp. 3791-3796.
Bojer, D., Neumann, B., Stammler, H.-G., Mitzel, N.W.: Subtle Size Effects in C-H Activation Reactions of Lanthanum and Praseodymium Tetramethylaluminates by Neutral Trinitrogen Bases. European Journal of Inorganic Chemistry. 3791-3796 (2011).
Bojer, Daniel, Neumann, Beate, Stammler, Hans-Georg, and Mitzel, Norbert W. “Subtle Size Effects in C-H Activation Reactions of Lanthanum and Praseodymium Tetramethylaluminates by Neutral Trinitrogen Bases”. European Journal of Inorganic Chemistry 25 (2011): 3791-3796.
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