Conclusions
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1.
According to the data of ab initio calculations, the complexes (C2H2)2M+ (M+=Li+, Na+, K+) and (C2H2)3Li+ are thermodynamically stable relative to the products of all possible decomposition paths.
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2.
With increasing number of acetylene molecules in the complex, the energy of the bond between the alkali metal cation and each ligand decreases very slightly. The relative tendency to form complexes with several acetylene molecules increases in the series Li+ < Na+ < K+.
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For communication 2, see [1].
Translated from Izvestiya Akademil Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1477–1479, July, 1982.
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Vitkovskaya, N.M., Moskovskaya, T.É. & Trofimov, B.A. AB initio investigation of complexes of acetylene with alkali metal cations. Russ Chem Bull 31, 1317–1319 (1982). https://doi.org/10.1007/BF00954144
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DOI: https://doi.org/10.1007/BF00954144