Question: There is some indication that other hydrogen ring compounds and ions in addition to H3 and D3 species may play a role in interstellar chemistry.

There is some indication that other hydrogen ring compounds and ions in addition to H3 and D3 species may play a role in interstellar chemistry.
According to J.S. Wright and G.A. DiLabio (J. Phys. Chem. 96, 10793 (1992)), H-5 H6, and H+7 are particularly stable whereas H4 and H+3 are not. Confirm these statements by Huckel calculations.

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The secular determinant for a cyclic species H has the form 123 X H4 H Hs H5 H6 H 1 0 0 H 1 1 0 Spec... View full answer

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