Molecular structure of [(tBu)2Al(μ-Cl)]2

McMahon, C. Niamh; Francis, Julie A.; Barron, Andrew R.

doi:10.1007/bf02575988

Cited by 13 publications

(8 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the solid state 5-Br exhibits a dimeric structure, in which the bromine atoms bridge two aluminum atoms to form a planar four-membered ring. This structural motif has been reported previously for analogous organo-aluminum halides. − Complexes 4-Cl and 5-Br sublime under reduced pressure (0.2 Torr) at 140 °C with no detectable decomposition. By analogy, 2 equiv of Et 3 SiLi reacts with AlBr 3 to yield, similarly to t BuMe 2 SiLi, the corresponding di-silyl-substituted aluminum complex 6-Br (Scheme ) as assayed by 1 H and 13 C{ 1 H} NMR spectroscopy (see Supporting Information), and upon workup it yields a low-melting point semi-solid material.…”

Section: Resultssupporting

confidence: 82%

Synthesis of Silyl Aluminum Reagents: Relevance Toward Atomic Layer Deposition of Metal Silicides and the Serendipitous Synthesis of a Novel Al-Hydride Cluster

et al. 2020

View full text Add to dashboard Cite

intramolecular amine-coordinated mono-silyl aluminum complex Me 2 N-(CH 2 ) 3 ( t BuMe 2 Si) 2 SiAlCl 2 was prepared by the reaction of Me 2 N(CH 2 ) 3 ( t BuMe 2 Si) 2 SiLi with AlCl 3 in Et 2 O. In addition, reaction of [( t BuMe 2 Si) 2 AlBr] 2 with LiAlH 4 yields the novel aluminum hydride cluster [( t BuMe 2 Si) 2 Al(μ-H)AlH 3 ] 6 which upon addition of TMEDA yields the ion pair [(( t BuMe 2 Si) 2 AlH) 2 (μ-H)] − [AlH 2 (TMEDA) 2 ] + . The amine-coordinated di-and tri-silyl aluminum complexes possess higher thermal stability than the analogous etherate complexes and are reasonably volatile (100−140 °C, 0.2 Torr). The materials presented herein were analyzed via thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC) to assess their viability as potential ALD precursors.

show abstract

Section: Resultssupporting

confidence: 82%

Synthesis of Silyl Aluminum Reagents: Relevance Toward Atomic Layer Deposition of Metal Silicides and the Serendipitous Synthesis of a Novel Al-Hydride Cluster

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The structure of compound 3 shows crystallographic disorder of two distinct classes. First, as we have previously observed 20 the tert-butyl groups exhibit rotational disorder about their respective Al᎐C α bonds. Second, the O(1)᎐C( 1)᎐C( 2)᎐C( 3) linkage shows severe disorder such that C(1) and C(2) are positioned on opposite sides of the plane defined by Al(1), O(1) and C(3), Fig.…”

Section: (Bumentioning

confidence: 80%

Alcohol and secondary amine complexes of tri-tert-butylaluminium: enhanced stability through intramolecular hydrogen bonding

McMahon¹,

Bott²,

Barron³

1997

J. Chem. Soc., Dalton Trans.

Self Cite

View full text Add to dashboard Cite

Reaction of Al(Bu t ) 3 with between 1 and 2 equivalents of HOCH 2 CH 2 CH 2 NMe 2 allows for the isolation of the Lewis acid-base complex, (Bu t ) 3 Al[O(H)CH 2 CH 2 CH 2 NMe 2 ] 1, which undergoes alkane elimination above 45 ЊC to yield [(Bu t ) 2 Al(µ-OCH 2 CH 2 CH 2 NMe 2 )] 2 2. Compound 2 is also formed directly when 2 equivalents of Al(Bu t ) 3 react with 1 equivalent of HOCH 2 CH 2 CH 2 NMe 2 . The molecular structure of 1 shows an Al᎐O bond distance comparable to that found in the bridging alkoxide compounds 2 and [(Bu t ) 2 Al(µ-OPr n )] 2 3, suggesting that the Al᎐O ؒ ؒ ؒ H unit may be considered analogous to a bridging alkoxide unit, Al(µ-OR)Al, as a consequence of a significant contribution from the zwitterionic alkoxide Ϫ /ammonium ϩ form made possible by a strong intraligand hydrogen bond. The kinetics of the conversion of 1 into 2 have been studied. A large activation energy and positive deuterium isotope effect are consistent with breaking of the hydrogen bond during the transition state. The reaction of (Bu t ) 3 Al(NMe 3 ) 4 with ethanol yields [(Bu t ) 2 Al(µ-OEt)] 2 5. The reaction of Al(Bu t ) 3 with HN(Me)(CH 2 ) n NMe 2 (n = 3 or 2) yields the stable Lewis acid-base adducts (Bu t ) 3 Al[NH(Me)CH 2 CH 2 CH 2 NMe 2 ]

show abstract

“…4b and c͒, together with the calculated ones that were used for the fitting analysis. 15 One of the most interesting features in Table II is the different Mg-O distance, which is 0.4 Å longer in Mg͑AlCl 2 EtBu͒ 2 /THF than in BuMgCl/THF, for which a couple of reasons can be imagined. To obtain reliable structural parameters, Debye-Waller factors 2 were treated as the same for several scattering atoms.…”

Section: Resultsmentioning

confidence: 99%

Complex Structures and Electrochemical Properties of Magnesium Electrolytes

Nakayama

Kudo

Oki

et al. 2008

J. Electrochem. Soc.

View full text Add to dashboard Cite

Magnesium organohaloaluminate in tetrahydrofuran ͓0.25 mol/L Mg͑AlCl 2 EtBu͒ 2 /THF, Et:C 2 H 5 ,Bu:C 4 H 9 ͔ is an electrolyte solution that is able to deposit and dissolve magnesium electrochemically and reversibly at room temperature. It has been reported that the electrochemical window is ruled by Lewis acidity of the aluminum compounds involved, and some complex species formed in the electrolyte have been suggested based on the analysis of nuclear magnetic resonances and Raman spectroscopy. Because in these analytical methods there are not enough controls to identify all the included compounds, neither the complete complex structures nor the mechanism of the reversible reaction has been revealed yet. Here, we show the complete complex structures in this electrolyte directly observed by the X-ray absorption fine structure measurements, which reveal the reversible equilibrium reaction as well as the other electrochemical properties of this electrolyte. A754) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 155.198.30.43 Downloaded on 2015-05-28 to IP A759 Journal of The Electrochemical Society, 155 ͑10͒ A754-A759 ͑2008͒ A759 ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 155.198.30.43 Downloaded on 2015-05-28 to IP

show abstract

Molecular structure of [(tBu)2Al(μ-Cl)]2

Cited by 13 publications

References 15 publications

Synthesis of Silyl Aluminum Reagents: Relevance Toward Atomic Layer Deposition of Metal Silicides and the Serendipitous Synthesis of a Novel Al-Hydride Cluster

Synthesis of Silyl Aluminum Reagents: Relevance Toward Atomic Layer Deposition of Metal Silicides and the Serendipitous Synthesis of a Novel Al-Hydride Cluster

Alcohol and secondary amine complexes of tri-tert-butylaluminium: enhanced stability through intramolecular hydrogen bonding

Complex Structures and Electrochemical Properties of Magnesium Electrolytes

Contact Info

Product

Resources

About