ETA(2)-ALKYNE COPPER(I) AND SILVER(I) COMPOUNDS - FROM POLYMERIC [M(I)R](N) TO MONOMERIC [M(I)R] UNITS (M=CU, AG)

This paper deals with the breakdown of polymeric organo-copper(I) and -silver(I) compounds of general type [M'R](n) (M=Cu, Ag; R = singly bonded organic or inorganic ligand) to aggregates with lower polynuclearity and to mononuclear M(I)X species. For the breakdown of the polynuclear structures of organo-copper(I) and -silver(I) compounds, main-group element substituted and organometallic substituted alkynes, diynes, and triynes are used. The synthesis, reactivity and structural features of [M(I)R](x) (x = 1-4) compounds are discussed.