A penta-co-ordinated aluminate dimer; X-ray crystal structure

Abstract

X-Ray structural analysis of a new barium aluminate glycolate (BaA108C6.75H14.75) has revealed a novel aluminate anion, formed from two distorted trigonal bipyramids sharing an edge to give a dimer.

Metal–Ligand Cooperativity of the Calix[4]pyrrolato Aluminate: Triggerable C−C Bond Formation and Rate Control in Catalysis

“…Binding of CO 2 occurs in a bidentate fashion by the formation of a C−C bond (155.8(6) pm) and Al−O bond (184.8(3) pm). The Al−O bond is in the range of other higher coordinated aluminum centres, whereas the C1‐C29 bond is elongated in comparison to common sp 3 ‐sp 2 C−C single bonds . The shortened C4‐N1 and C2‐C3 bonds verify the dearomatization of the pyrrole ring.…”

Metal–Ligand Cooperativity of the Calix[4]pyrrolato Aluminate: Triggerable C−C Bond Formation and Rate Control in Catalysis

“…However,i na ll cases,f ull reversibility of the addition process was observed. Adding 2bar of CO 2 to a 13 C-labeled adduct [Li(thf) n ][1*- 13 CO 2 ]i nd ichloromethane resulted in as mooth exchange of 13 CO 2 over 18 ha tr oom temperature,a gain in close similarity with PNN-or PNP complexes of Ru II or Re I ( Figure 4A). [5a,e, 8] Moreover,C O 2 was readily replaced by the addition of most aldehydes to [1*-CO 2 ] À ,y ielding the aldehyde adducts in ar emarkable purity ( Figure 4B).…”

“…Binding of CO 2 occurs in ab identate fashion by the formation of aC À Cb ond (155.8-( 6) pm) and Al À Ob ond (184.8(3) pm). TheAl À Ob ond is in the range of other higher coordinated aluminum centres, [13] whereas the C1-C29 bond is elongated in comparison to common sp 3 -sp 2 CÀCs ingle bonds. [14] Thes hortened C4-N1 and C2-C3 bonds verify the dearomatization of the pyrrole ring.…”

Reactions of alkylalane diolates with water synthesis, characterisation and ε-caprolactone polymerisation activity of novel alane benzopinacolates

“…Crystal and structure refinement data are listed in Ta [36] and reaction products of sterically crowded alane bisphenolates with benzaldehyde [15,37]. Moreover the Al atoms bonded to five O atoms were found in an alane lithium derivative [Li 2 Al 2 (binap) 4 AE 4thf] (where binap = binaphthol-2H) [38] and an aluminium glicolate anionic compound {[(C 16 H 32 Al 4 -O 16 ) 4À ] n 2n(Ba 2+ )} [39].…”