Hexadiynedinitrile


Phase change data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity Value Units Method Reference Comment
Δsub8.590kcal/molVSaggiomo, 1957Hfusion=1.360 kcal/mol; ALS

Enthalpy of vaporization

ΔvapH (kcal/mol) Temperature (K) Method Reference Comment
7.22355.AStephenson and Malanowski, 1987Based on data from 341. to 369. K. See also SAGGIOMO, 1957.; AC

Enthalpy of sublimation

ΔsubH (kcal/mol) Temperature (K) Method Reference Comment
8.22309.AStephenson and Malanowski, 1987Based on data from 294. to 335. K.; AC
8.58315.ISAGGIOMO, 1957Based on data from 295. to 335. K.; AC

Gas phase ion energetics data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

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

Ionization energy determinations

IE (eV) Method Reference Comment
11.2SConnors, Roebber, et al., 1974LLK
11.4 ± 0.2EIDibeler, Reese, et al., 1961RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C+23.0 ± 0.5?EIDibeler, Reese, et al., 1961RDSH
CN+20.0 ± 1.0?EIDibeler, Reese, et al., 1961RDSH
C2+18.4 ± 1.0?EIDibeler, Reese, et al., 1961RDSH
C2N+17.0 ± 0.1?EIDibeler, Reese, et al., 1961RDSH
C3+23.0 ± 2.0?EIDibeler, Reese, et al., 1961RDSH
C3N+22.0 ± 0.5?EIDibeler, Reese, et al., 1961RDSH
C4+17.8 ± 0.4?EIDibeler, Reese, et al., 1961RDSH
C4N+19.0 ± 1.0C2NEIDibeler, Reese, et al., 1961RDSH
C5+24.0 ± 0.5?EIDibeler, Reese, et al., 1961RDSH
C5N+17.3 ± 0.2CNEIDibeler, Reese, et al., 1961RDSH
C6N+19.2 ± 0.3NEIDibeler, Reese, et al., 1961RDSH
N+≤19.?EIDibeler, Reese, et al., 1961RDSH

References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Saggiomo, 1957
Saggiomo, A.J., The dinitriles of acetylenedicarboxylic and polyacetylenedicarboxylic acids. I. Dicyanoacetylene and dicycanodiacetylene, J. Org. Chem., 1957, 22, 1171. [all data]

Stephenson and Malanowski, 1987
Stephenson, Richard M.; Malanowski, Stanislaw, Handbook of the Thermodynamics of Organic Compounds, 1987, https://doi.org/10.1007/978-94-009-3173-2 . [all data]

SAGGIOMO, 1957
SAGGIOMO, ANDREW J., The Dinitriles of Acetylenedicarboxylic and Polyacetylenedicarboxylic Acids. 1 I. 2 Dicyanoacetylene and Dicyanodiacetylene, J. Org. Chem., 1957, 22, 10, 1171-1175, https://doi.org/10.1021/jo01361a009 . [all data]

Connors, Roebber, et al., 1974
Connors, R.E.; Roebber, J.L.; Weiss, K., Vacuum ultraviolet spectroscopy of cyanogen and cyanoacetylenes, J. Chem. Phys., 1974, 60, 5011. [all data]

Dibeler, Reese, et al., 1961
Dibeler, V.H.; Reese, R.M.; Franklin, J.L., Mass spectrometric study of cyanogen and cyanoacetylenes, J. Am. Chem. Soc., 1961, 83, 1813. [all data]


Notes

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