Silber(I)‐ und Kupfer(I)‐Komplexe von 1,6‐Cyclodecadiin und 1,7‐Cyclododecadiin

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: [C 10 H 12 ·AgCF 3 SO 3 ] n ( 4 ), [C 10 H 12 ·CuCF 3 SO 3 ] n ( 5 ), [C 12 H 16 ·AgCF 3 SO 3 ] n ( 6 ), [C 12 H 16 ·CuCF 3 SO 3 ] n ( 7 ), and [C 14 H 20 ·AgCF 3 SO 3 ] 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(CF 3 SO 3 ) 2 Ag 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 .