Angewandte Chemie International Edition
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Inside Cover: Homoleptic Silver(I) Acetylene Complexes (Angew. Chem. Int. Ed. 43/2007)
High up in permanent ice is where the homoleptic silver(I) acetylene complexes described by I. Krossing, W. Scherer, and co-workers in their Communication on page 8295 ff. would feel comfortable. Permanent cooling was required for synthesis, handling, and characterization. Nevertheless, even experimental charge-density studies could be carried out, which indicate a bonding situation that is intermediate between purely electrostatic and weakly covalent.