“…The Al–Me bond length in complex 2 [1.943(2) Å] is virtually identical with that observed for 16 Fnac 2 AlMe 2 [1.945(2) Å], but shorter than those reported for 10 Fnac 2 AlMe 2 [ 10 Fnac 2 = HC[C(CH 3 )NC 6 F 5 ] 2 , 1.957(3)/1.947(3) Å] [ 23 ] and Mesnac 2 AlMe 2 [1.960(3), 1.966(4) Å], [ 24 ] respectively. As was observed in the zinc complexes, the Al–N bond length also increases and the N–Al–N bond angles decrease with decreasing σ ‐donor capacity of the β ‐diketiminate substituent [Mesnac 2 AlMe 2 1.916(3)/1.926(3), 95.24(12)°; [ 24 ] 10 Fnac 2 AlMe 2 1.917(2)/1.926(2), 94.00(8)°; [ 23 ] 16 Fnac 2 AlMe 2 1.948(2)/1.942(2), 93.02(7)°; [ 19a ] and 17 Fnac 2 AlMe 2 (1.949(2)/1.956(2), 89.80(8)°], whereas the Me–Al–Me bond angles steadily increase [Mesnac 2 AlMe 2 112.63 (15)°; 10 Fnac 2 AlMe 2 118.89(14)°; 16 Fnac 2 AlMe 2 120.77(7)°; 17 Fnac 2 AlMe 2 123.74(2)°]. Deviations from planarity (defined by N1, N2, C1, C3) are observed for the Al atom [0.8779(28) Å] and the γ ‐carbon atom [0.2163(33) Å] in complex 2 .…”