Crystal structure of hexakis(N,N-dimethylformamide-O)aluminium(III) tris(tribromide), Al[(CH3)2N(CH)O]6(Br3)3

Bekaert, Alain; Barberan, Olivier; Kaloun, El Bachir; Rabhi, C.; Danan, A.; Brion, J.; Lemoine, Pascale; Viossat, Β.

doi:10.1524/ncrs.2002.217.jg.128

Cited by 6 publications

(6 citation statements)

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“…Whereas the solvated structure of Zn II in N,N-dimethylformamide was previously studied (Ozutsumi et al, 1993;Suzuki et al, 1991), the study of Zn II complexes with chiral amidic ligands would be of current interest due to their potential use as models for Zn-containing enzymes. Our experience of crystalline organometallic complexes such as Al(DMF) 6 (Br 3 ) 3 (Bekaert et al, 2002a) and B(DMA) 4 (Br 3 ) 2 Br (Bekaert et al, 2002b), based on metal±amide bonds, led us to investigate a crystalline structure including ZnBr 2 and a chiral amide based on (R,R)-1,2-diamminocyclohexane, a well known chiral building block.…”

Section: Commentmentioning

confidence: 99%

catena-Poly[[dibromozinc(II)]-μ-(R,R)-1,2-diacetamidocyclohexane]

et al. 2003

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The asymmetric unit of the title compound, [ZnBr2(C10H18N2O2)], contains a fragment of the polymeric chain [(R,R)‐1,2‐diacetamidocyclohexanedibromozinc(II)]n. The Zn atom is coordinated by two bromide anions and two 1,2‐diacetamidocyclohexane (DCH) ligands acting as 1,8‐bridging via the O atoms. The complex exhibits a distorted tetrahedral geometry around the Zn atom. The crystal packing is characterized by several van der Waals contacts, these interactions resulting in chains parallel to the b axis.

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Section: Commentmentioning

confidence: 99%

catena-Poly[[dibromozinc(II)]-μ-(R,R)-1,2-diacetamidocyclohexane]

et al. 2003

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“…b On several separate occasions, there appeared to be experimental evidence for the existence of [Al({CH 3 } 2 CO) N ] 3+ complexes; however, the fragmentation data were never sufficiently reproducible to be conclusive. c Crystallographic evidence available regarding the formation of a stable structure between this molecule and Al 3+ . − d No gas-phase experiments were undertaken with this molecule. e Dimethyl formamide.…”

Section: Resultsmentioning

confidence: 99%

“…To explore this anomaly further, we have attempted to prepare stable gas-phase complexes between Al 3+ and a variety of ligands with varying physical properties. The ligands range from those previously identified with the chemistry of Al 3+ in the condensed phase, − such as acetonitrile, through to more esoteric ligands, such as argon and CO 2 , which in earlier gas-phase experiments have been shown to successfully stabilize uncommon oxidation states, such as Ag(II) and Au(II). , Although many of the ligands explored are simple when compared to those previously associated with the aqueous chemistry of Al 3+ , , the range does cover those that stabilize Al 3+ and those that do not. An advantage of examining ligands containing few atoms is that they are amenable to theoretical analysis.…”

Section: Introductionmentioning

confidence: 99%

What Is Required to Stabilize Al³⁺? A Gas-Phase Perspective

et al. 2005

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With a combination of experiment and theory (ab initio and DFT), we demonstrate that the Al(3+) cation can be stabilized in the gas phase using ligands, which have the ability to act as powerful sigma electron donors and electron acceptors. The latter property, which implies that electron density from the aluminum cation moves into ligand antibonding orbitals, has not previously been considered significant when accounting for the behavior of Al(3+). Of the three ligands identified as falling into the above category, acetonitrile appears to form the most stable complexes in the gas phase, which is in accord with the long established fact that solid-state complexes with Al(3+) are readily isolated. From the results, it is suggested that chain or ring compounds containing the -C triple bond N group might act as successful sequestering agents for Al(3+) from aqueous solutions.

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“…Following our work on metal-amide crystalline complexes (Bekaert et al, 2002a(Bekaert et al, ,b, 2003, we recently reported a new zinc complex with 2-hydroxypropanamide (lactamide), a bidentate ligand (Bekaert et al, 2005). In the [Zn(lactamide) 3 ] 2+ cation, the Zn atom, coordinated in a bidentate fashion via amide and oxide atoms O of each ligand, presents similar Zn-O bond lengths [2.074 (6) Å ].…”

Section: Commentmentioning

confidence: 99%