aluminium trihydride

Formula: AlH₃
Molecular weight: 30.00536
IUPAC Standard InChI: InChI=1S/Al.3H
IUPAC Standard InChIKey: AZDRQVAHHNSJOQ-UHFFFAOYSA-N
CAS Registry Number: 7784-21-6
Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
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Other names: Aluminum hydride
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Reaction thermochemistry data

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Individual Reactions

H₂Al^- + = aluminium trihydride

By formula: H₂Al^- + H⁺ = H₃Al

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1560.2 ± 3.3	kJ/mol	N/A	Hinde, 2000	gas phase
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	1526.7 ± 3.8	kJ/mol	H-TS	Hinde, 2000	gas phase

+ aluminium trihydride = H₄Al^-

By formula: H^- + H₃Al = H₄Al^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	314. ± 17.	kJ/mol	CIDT	Goebbert, Hernandez, et al., 2005	gas phase

Vibrational and/or electronic energy levels

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Data compiled by: Marilyn E. Jacox

State: X

Vib. sym.	No.	Approximate type of mode	cm^-1		Med.	Method	References


a₂	2	OPLA	712.2		Ne	IR	Wang, Andrews, et al., 2003
	2	OPLA	697.7	m	Ar	IR	Chertihin and Andrews, 1993 Kurth, Eberlein, et al., 1993 Pullumbi, Bouteiller, et al., 1994 Wang, Andrews, et al., 2003
	2	OPLA	709.2		p-H₂	IR	Andrews and Wang, 2004
	2	OPLA	711.3		H₂	IR	Andrews and Wang, 2003 Wang, Andrews, et al., 2003 Andrews and Wang, 2004
d'	3	AlH₃ stretch	1889.1		Ne	IR	Wang, Andrews, et al., 2003 Andrews and Wang, 2004
e'	3	AlH₃ stretch	1882.6	vs	Ar	IR	Chertihin and Andrews, 1993 Kurth, Eberlein, et al., 1993 Pullumbi, Bouteiller, et al., 1994 Wang, Andrews, et al., 2003
	3	AlH₃ stretch	1885.5		p-H₂	IR	Andrews and Wang, 2004
	3	AlH₃ stretch	1883.7		H₂	IR	Andrews and Wang, 2003 Wang, Andrews, et al., 2003 Andrews and Wang, 2004
	4	Deformation	782.9		Ne	IR	Wang, Andrews, et al., 2003
	4	Deformation	783.5	m	Ar	IR	Chertihin and Andrews, 1993 Kurth, Eberlein, et al., 1993 Pullumbi, Bouteiller, et al., 1994 Wang, Andrews, et al., 2003
	4	Deformation	779.6		p-H₂	IR	Andrews and Wang, 2004
	4	Deformation	777.9		H₂	IR	Andrews and Wang, 2003 Wang, Andrews, et al., 2003 Andrews and Wang, 2004

Additional references: Jacox, 1998, page 212

Notes

Medium

Very strong

References

Go To: Top, Reaction thermochemistry data, Vibrational and/or electronic energy levels, Notes

Hinde, 2000
Hinde, R.J., Ab initio gas-phase acidities of NaH, MgH2, and AlH3, J. Phys. Chem. A, 2000, 104, 32, 7580-7585, https://doi.org/10.1021/jp994138j . [all data]

Goebbert, Hernandez, et al., 2005
Goebbert, D.J.; Hernandez, H.; Francisco, J.S.; Wenthold, P.G., The binding energy and bonding in dialane, J. Am. Chem. Soc., 2005, 127, 33, 11684-11689, https://doi.org/10.1021/ja0424070 . [all data]

Wang, Andrews, et al., 2003
Wang, X.; Andrews, L.; Tam, S.; DeRose, M.E.; Fajardo, M.E., Infrared Spectra of Aluminum Hydrides in Solid Hydrogen: Al, J. Am. Chem. Soc., 2003, 125, 30, 9218, https://doi.org/10.1021/ja0353560 . [all data]

Chertihin and Andrews, 1993
Chertihin, G.V.; Andrews, L., Reactions of pulsed-laser ablated aluminum atoms with hydrogen: infrared spectra of aluminum hydride (AlH, AlH2, AlH3, and Al2H2) species, J. Phys. Chem., 1993, 97, 40, 10295, https://doi.org/10.1021/j100142a007 . [all data]

Kurth, Eberlein, et al., 1993
Kurth, F.A.; Eberlein, R.A.; Schnockel, H.; Downs, A.J.; Pulham, C.R., J. Chem. Soc., 1993, Chem. Commun. 1302. [all data]

Pullumbi, Bouteiller, et al., 1994
Pullumbi, P.; Bouteiller, Y.; Manceron, L.; Mijoule, C., Aluminium, gallium and indium trihydrides. an IR matrix isolation and ab initio study, Chem. Phys., 1994, 185, 1, 25, https://doi.org/10.1016/0301-0104(94)00111-1 . [all data]

Andrews and Wang, 2004
Andrews, L.; Wang, X., Infrared Spectra of Dialanes in Solid Hydrogen, J. Phys. Chem. A, 2004, 108, 19, 4202, https://doi.org/10.1021/jp037792e . [all data]

Andrews and Wang, 2003
Andrews, L.; Wang, X., The Infrared Spectrum of Al2H6 in Solid Hydrogen, Science, 2003, 299, 5615, 2049, https://doi.org/10.1126/science.1082456 . [all data]

Jacox, 1998
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules: supplement A, J. Phys. Chem. Ref. Data, 1998, 27, 2, 115-393, https://doi.org/10.1063/1.556017 . [all data]

Notes

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Symbols used in this document:

Δ_rG° Free energy of reaction at standard conditions

Δ_rH° Enthalpy of reaction at standard conditions
Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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Δ_rG°	Free energy of reaction at standard conditions
Δ_rH°	Enthalpy of reaction at standard conditions