Acetylide Complexes of Silver Salts

Reference 6 chronicles the thermochemistry of some unusual complexes with the general formula (Ag2C2)m- (AgX) . Table 2 presents the enthalpies of formation14 as well as enthalpies of their formal synthesis or complexation reaction 5 

All of the complexation reaction enthalpies are endothermic for all X investigated. This seems unlikely in that this complexation reaction most probably has AS 0. Accordingly, the reaction would have a net AG 0 and so it is not obvious how these complexes would be formed. 

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