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ORTEP representation of compound 12 (30 % probability ellipsoids). Hydrogen atoms and occluded molecule of diethyl ether solvent are omitted for clarity. Selected bond lengths [Å] and angles [°]: Al1−N1 1.887(2), Al1−N2 1.8889(19), Al2−N3 1.890(2), Al2−N4 1.892(2), Si1−N1 1.729(2), Si2−N2 1.7333(19), Si3−N3 1.731(2), Si4−N4 1.731(2); N1−Al1−N2 108.84(9), N3−Al2−N4 108.77(9).
