Some tetrahydroborate derivatives of aluminium: crystal structures of dimethylaluminium tetrahydroborate and the α and β phases of aluminium tris(tetrahydroborate) at low temperature

Aldridge, Simon; Blake, Alexander J.; Downs, Anthony J.; Gould, Robert O.; Parsons, Simon; Pulham, Colin R.

doi:10.1039/a607843e

Cited by 60 publications

(69 citation statements)

References 36 publications

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“…The average D-B-D angles are 112.4 and 115.9 respectively in the Zn-D 2 B and Li-D 2 B fragments, versus 107.3 for the D-B-D angles of the noncoordinating edges. Similar opening of the coordinated BH 2 edges was observed both experimentally by single crystal X-ray diffraction and by DFT calculations in ␣-Mg(BH 4 ) 2 (P6 1 22) and Al(BH 4 ) 3[6,[26][27][28]. While the experimental difference between the coordinated and non-coordinated H-B-H angles in Mg(BH 4 ) 2 is only 2.0 • , the difference is 6.5 • in LiZn 2 (BD 4 )5 .…”

supporting

confidence: 69%

Structural studies of lithium zinc borohydride by neutron powder diffraction, Raman and NMR spectroscopy

Ravnsbæk

Frommen

Reed

et al. 2011

Journal of Alloys and Compounds

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supporting

confidence: 69%

Structural studies of lithium zinc borohydride by neutron powder diffraction, Raman and NMR spectroscopy

Ravnsbæk

Frommen

Reed

et al. 2011

Journal of Alloys and Compounds

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“…However, at low temperatures two distinct phases of this compound were identified, both possessing a complex crystalline symmetry. 45,46 In the two solid phases and in the liquid phase, the aluminum cation is coordinated by three BH 4 groups and the structure is bonded via weak dispersive interactions.…”

Section: Introductionmentioning

confidence: 99%

Binding in alkali and alkaline-earth tetrahydroborates: Special position of magnesium tetrahydroborate

Łodziana

Setten

2010

Phys. Rev. B

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Compounds of light elements and hydrogen are currently extensively studied due to their potential application in the field of hydrogen or energy storage. A number of new interesting tetrahydroborates that are especially promising due to their very high gravimetric hydrogen content were recently reported. However, the determination and understanding of their complex crystalline structures has created considerable debate. Metal tetrahydroborates, in general, form a large variety of structures ranging from simple for NaBH 4 to very complex for Mg͑BH 4 ͒ 2 . Despite the extensive discussion in the literature no clear explanation has been offered for this variety so far. In this paper we analyze the structural and electronic properties of a broad range of metal tetrahydroborates and reveal the factors that determine their structure: ionic bonding, the orientation of the BH 4 groups, and the coordination number of the metal cation. We show, in a simple way, that the charge transfer in the metal tetrahydroborates rationally explains the structural diversity of these compounds. Being ionic systems, the metal tetrahydroborates fall into the classification of Linus Pauling. By using the ionic radius for the BH 4 group as determined in this paper, this allows for structural predictions for new and mixed compounds.

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“…[77][78][79][80]. Between these extremes, numerous metal borohydrides with framework structures, pronounced directionality in the bonding and clearly some degree of covalence are found, e.g.…”

Section: Trends In Structuresmentioning

confidence: 99%

Complex and liquid hydrides for energy storage

et al. 2016

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The research on complex hydrides for hydrogen storage was initiated by the discovery of Ti as a hydrogen sorption catalyst in NaAlH 4 by Boris Bogdanovic in 1996. A large number of new complex hydride materials in various forms and combinations have been synthesized and characterized, and the knowledge regarding the properties of complex hydrides and the synthesis methods has grown enormously since then. A significant portion of the research groups active in the field of complex hydrides is collaborators in the International Energy Agreement Task 32. This paper reports about the important issues in the field of complex hydride research, i.e. the synthesis of borohydrides, the thermodynamics of complex hydrides, the effects of size and confinement, the hydrogen sorption mechanism and the complex hydride composites as well as the properties of liquid complex hydrides. This paper is the result of the collaboration of several groups and is an excellent summary of the recent achievements.

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Some tetrahydroborate derivatives of aluminium: crystal structures of dimethylaluminium tetrahydroborate and the α and β phases of aluminium tris(tetrahydroborate) at low temperature

Cited by 60 publications

References 36 publications

Structural studies of lithium zinc borohydride by neutron powder diffraction, Raman and NMR spectroscopy

Structural studies of lithium zinc borohydride by neutron powder diffraction, Raman and NMR spectroscopy

Binding in alkali and alkaline-earth tetrahydroborates: Special position of magnesium tetrahydroborate

Complex and liquid hydrides for energy storage

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