The preferred structure of C2H-2

Chandrasekhar, Jayaraman ; Kahn, Richard A. ; Schleyer, Paul von Rague (1982) The preferred structure of C2H-2 Chemical Physics Letters, 85 (5-6). pp. 493-495. ISSN 0009-2614

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Alternative structures for C2H-2 have been investigated by ab initio calculations using augmented basis sets. Results indicate both cis bent and trans bent acetylene-like HCCH- alternatives are unstable towards electron loss. The electron affinity of vinylidene, H2C=C:, is found to be positive. Hence, the resulting anion, H2C=C-, is indicated to be the observed long-lived C2H-2 species.

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