Publication details

ALUMAZENE REACTIVITY – ADDITION AND SUBSTITUTION REACTIONS ON THE AL3N3 RING

Authors

PINKAS Jiří KOLLHAMMEROVÁ Iva NEČAS Marek BABIAK Michal

Year of publication 2019
Type Conference abstract
MU Faculty or unit

Faculty of Science

Citation
Description Alumazene [(DippN)3Al3Me3] (1, Dipp = 2,6-i-Pr2C6H3) in comparison with its isoelectronic analogue C6H6 is not aromatic, its pi electrons are not delocalized, and the Al-N bonds are highly polar. 1 undergoes formal addition of silanetriols and triaminosilanes, dealkylsilylation, coordination of Lewis bases, and Me/F exchange. We prepared a dinuclear complex [(DippNH)2Al2Me2(q)2] (2) with a central Al2O2 ring and five-coordinate Al atoms in a reaction of 1 with quinolin-8-ol (Hq). The mononuclear complex [(DippNH)Al(Meq)2] (3) obtained in the reaction of 1 with 2-methyl-quinolin-8-ol (HMeq) possesses a five-coordinate Al center. The dinuclear complex 2 can be considered as a model product of alcohol addition on the formal Al-N double bond, while the mononuclear complex 3 results from subsequent reaction of remaining Al-Me moiety with a proton of HMeq. Halogenation reactions of 1 with BCl3 and BBr3 provided by Me/halogen exchange di- and trihalogenated derivatives: [(DippN)3Al3Me3-nXn] (4 : X = Cl, n = 2; 5 : X = Cl, n = 3; 6 : X = Br, n = 2; 7 : X = Br, n = 3). Prepared compounds were characterized by 1H, 13C, and 27Al NMR spectroscopy, DIP-MS analysis, and ICP OES analysis and their molecular structures were established by the single-crystal X-ray diffraction analysis.
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