Document Type


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Journal/Book/Conference Title

The Journal of Chemical Physics





DOI of Original Publication



Originally published at

Date of Submission

October 2015


The electronic and geometrical structures of the ground and low-lying excited states of the diatomic AlX and AlX− series (X=H, Li, Be, B, C, N, O, and F) are calculated by the coupled-cluster method with all singles and doubles and noniterative inclusion of triples using a large atomic natural orbital basis. All the ground-state AlX molecules except for AlF can attach an additional electron and form ground-state AlX− anions. The ground-state AlBe−, AlB−, AlC−, AlN−, and AlO− anions possess excited states that are stable toward autodetachment of an extra electron; AlBe− also has a second excited state. Low-lying excited states of all AlX but AlN can attach an extra electron and form anionic states that are stable with respect to their neutral (excited) parent states. The ground-state AlLi−, AlBe−, AlB−, AlN−, and AlO− anions are found to be thermodynamically more stable than their neutral parents. The most stable is AlO−, whose dissociation energy to Al+O− is 6.4 eV. Correspondingly, AlO possesses the largest electron affinity (2.65 eV) in the series.


Gutsev, G. L., Jena, P., Bartlett, R. J. Structure and stability of the AlX and AlX− species. The Journal of Chemical Physics 110, 2928 (1999). Copyright © 1999 AIP Publishing LLC.

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