SILVER(I) AND COPPER(I) COMPLEXES OF 1,6-CYCLODECADIYNE AND 1,7-CYCLODODECADIYNE

Silver(1) and Copper(1) Complexes of 1,6‐Cyclodecadiyne and 1,7‐Cyclododecadiyne The reactions of 1,6‐cyclodecadiyne (1), 1,7‐cyclododecadiyne (2), and 1,8‐cyclotetradecadiyne (3) with silver(I) triflate and copper(I) triflate yield colourless crystals: [C10H12·AgCF3SO3]n (4), [C10H12·CuCF3SO3]n(5), [C12H16·AgCF3SO3]n (6), [C12H16·CuCF3SO3]n (7), and [C14H20·AgCF3SO3]n (8). The spectroscopic data of 4–8 indicate a weak interaction between the triple bonds and the metal ion. In the crystal structure of 4 double‐strands of 1,6‐cyclodecadiyne rings in the chair conformation are coupled by Ag(CF3SO3)2Ag units to form a two‐dimensional network. The X‐ray analysis of single crystals of 6 and 7 reveals twelve‐membered rings that are connected by silver or copper ions, respectively. Each triflate ligand in 6 and 7 uses two of its oxygen atoms to coordinate two different metal centers. The result is a complex three‐dimensional network. In the case of the silver complex 8, the X‐ray analysis also exhibits a similar polymeric structure. Only slight differences of the structural parameters are observed on comparison of the free cyclic dialkyne and that bound to a metal in 4, 6, and 7. The conformation of the 10‐ or 12 membered rings in 1 and 2 are more or less identical to those in 4 or 6 and 7. Copyright © 1990 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim