Arsine

Formula: AsH₃
Molecular weight: 77.94542
IUPAC Standard InChI: InChI=1S/AsH3/h1H3
IUPAC Standard InChIKey: RBFQJDQYXXHULB-UHFFFAOYSA-N
CAS Registry Number: 7784-42-1
Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript.
Other names: Arsenic trihydride; Arsenic hydride; Arseniuretted hydrogen; Arsenous hydride; Hydrogen arsenide; AsH3; Arsenic hydrid; Arsenowodor; Arsenwasserstoff; UN 2188; Arsenic hydride (AsH3)
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Other data available:
Data at other public NIST sites:
- Gas Phase Kinetics Database
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Gas phase ion energetics data

Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
LL - Sharon G. Lias and Joel F. Liebman

View reactions leading to H₃As⁺ (ion structure unspecified)

Quantity	Value	Units	Method	Reference	Comment
Proton affinity (review)	178.8	kcal/mol	N/A	Hunter and Lias, 1998	HL
Quantity	Value	Units	Method	Reference	Comment
Gas basicity	170.2	kcal/mol	N/A	Hunter and Lias, 1998	HL

Ionization energy determinations

IE (eV)	Method	Reference	Comment
9.89	PE	Potts and Price, 1972	LLK
10.06 ± 0.03	PE	Branton, Frost, et al., 1970	RDSH
10.03	PI	Price and Passmore, 1963	RDSH
10.58 ± 0.05	PE	Demuth, 1977	Vertical value; LLK

Appearance energy determinations

Ion	AE (eV)	Other Products	Method	Reference	Comment
As⁺	15.0 ± 0.3	H₂+H	EI	Saalfeld and McDowell, 1967	RDSH
As⁺	14.8 ± 0.2	H₂+H	EI	Saalfeld and Svec, 1963	RDSH
AsH⁺	11.30 ± 0.05	H₂	PI	Berkowitz, 1988	LL
AsH⁺	12.5 ± 0.2	H₂	EI	Saalfeld and McDowell, 1967	RDSH
AsH⁺	12.4 ± 0.2	H₂	EI	Saalfeld and Svec, 1963	RDSH
AsH₂⁺	12.69 ± 0.01	H	PI	Berkowitz, 1988	LL
AsH₂⁺	13.4 ± 0.2	H	EI	Saalfeld and McDowell, 1967	RDSH
AsH₂⁺	14.5 ± 0.2	H	EI	Saalfeld and Svec, 1963	RDSH

De-protonation reactions

H₂As^- + = Arsine

By formula: H₂As^- + H⁺ = H₃As

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	357.5 ± 2.1	kcal/mol	G+TS	Gal, Maria, et al., 1989	gas phase; B
Δ_rH°	357.8 ± 3.1	kcal/mol	D-EA	Smyth and Brauman, 1972	gas phase; B
Δ_rH°	361.9 ± 6.1	kcal/mol	G+TS	Wyatt, Holtz, et al., 1974	gas phase; Between PH₃, H₂S; value altered from reference due to change in acidity scale; B
Δ_rH°	<359.7 ± 4.6	kcal/mol	EIAE	Ebinghaus, Kraus, et al., 1964	gas phase; From AsH₃; B
Δ_rH°	359.00	kcal/mol	N/A	Check, Faust, et al., 2001	gas phase; CrOO-(q); ; ΔS(EA)=1.7; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	350.0 ± 2.0	kcal/mol	IMRE	Gal, Maria, et al., 1989	gas phase; B
Δ_rG°	354.4 ± 6.0	kcal/mol	IMRB	Wyatt, Holtz, et al., 1974	gas phase; Between PH₃, H₂S; value altered from reference due to change in acidity scale; B
Δ_rG°	352.20	kcal/mol	N/A	Check, Faust, et al., 2001	gas phase; CrOO-(q); ; ΔS(EA)=1.7; B

References

Go To: Top, Gas phase ion energetics data, Notes

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Potts and Price, 1972
Potts, A.W.; Price, W.C., Photoelectron spectra and valence shell orbital structures of groups V VI hydrides, Proc. R. Soc. London A:, 1972, 326, 181. [all data]

Branton, Frost, et al., 1970
Branton, G.R.; Frost, D.C.; McDowell, C.A.; Stenhouse, I.A., The photoelectron spectra of phosphine and arsine, Chem. Phys. Lett., 1970, 5, 1. [all data]

Price and Passmore, 1963
Price, W.C.; Passmore, T.R., [Title unavailable], Faraday Discuss. Chem. Soc., 1963, 35, 232. [all data]

Demuth, 1977
Demuth, R., Photoelektronenspektren von einigen Trihalogensilylphosphanen und -arsanen X₃SiER₂ (X = F, Cl; E = N, P, As; R = H, CH₃), Z. Naturforsch. B:, 1977, 32, 1252. [all data]

Saalfeld and McDowell, 1967
Saalfeld, F.E.; McDowell, M.V., The mass spectra of volatile hydrides. V. Silylarsine, Inorg. Chem., 1967, 6, 96. [all data]

Saalfeld and Svec, 1963
Saalfeld, F.E.; Svec, H.J., The mass spectra of volatile hydrides. I. The monoelemental hydrides of the group IVB and VB elements, Inorg. Chem., 1963, 2, 46. [all data]

Berkowitz, 1988
Berkowitz, J., Photoionization mass spectrometric studies of AsHn(n=1-3), J. Chem. Phys., 1988, 89, 7065. [all data]

Gal, Maria, et al., 1989
Gal, J.-F.; Maria, P.-C.; Decouzon, M., The Gas-Phase Acidity and Bond Dissociation Energies of Hydrogen Telluride, Int. J. Mass Spectrom. Ion Proc., 1989, 93, 1, 87, https://doi.org/10.1016/0168-1176(89)83076-9 . [all data]

Smyth and Brauman, 1972
Smyth, K.C.; Brauman, J.I., Photodetachment of electrons from amide and arsenide ions: The electron affinities of NH₂ and AsH₂., J. Chem. Phys., 1972, 56, 4620. [all data]

Wyatt, Holtz, et al., 1974
Wyatt, R.H.; Holtz, D.; McMahon, T.B.; Beauchamp, J.L., Acidity, basicity, and ion-molecule reactions of arsine in the gas phase by ICR spectroscopy, Inorg. Chem., 1974, 13, 1511. [all data]

Ebinghaus, Kraus, et al., 1964
Ebinghaus, H.; Kraus, K.; Neuert, H.; Muller-Duysing, W., Negative Ionen durch Elecktronenresonanzeinfang in PH₃, AsH₃, und SiH₄, Z. Naturfor., 1964, 19A, 732. [all data]

Check, Faust, et al., 2001
Check, C.E.; Faust, T.O.; Bailey, J.M.; Wright, B.J.; Gilbert, T.M.; Sunderlin, L.S., Addition of Polarization and Diffuse Functions to the LANL2DZ Basis Set for P-Block Elements, J. Phys. Chem. A,, 2001, 105, 34, 8111, https://doi.org/10.1021/jp011945l . [all data]

Notes

Go To: Top, Gas phase ion energetics data, References

Symbols used in this document:

AE Appearance energy

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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AE	Appearance energy
Δ_rG°	Free energy of reaction at standard conditions
Δ_rH°	Enthalpy of reaction at standard conditions