SYNTHESIS AND CHARACTERIZATION OF MONOMERIC BIS ((-ALKYNE)SILVER(I) COMPOUNDS - CRYSTAL-STRUCTURE OF (ETA(2)(ETA(5)-C5H4SIME3)2TI(C-EQUIVALENT-TO-CSIME3)2)AGNO2

The application of (eta5-C5H4SiMe3)2Ti(C = C-SiMe3)2 (1) as an organometallic chelate ligand to break down [AgX]n aggregates into monomeric AgX units is discussed. Compounds of type {(eta5-C5H4SiMe3)2Ti-(C = CSiMe3)2}Ag(I)X (3) (3a, X = Cl; 3b, X = CN, 3c, X = SCN, 3d, X = NO2, 3e, X = ClO4) were synthesized in high yields by the reaction of 1 with (1/n)[AgX]n (2). Complexes 3 are the first stable compounds in which alkyne units are eta2-side-on coordinated to monomeric Ag(I)X building blocks. The identity of all new compounds has been documented by analytical, as well as by spectroscopic (IR, H-1 NMR, MS), data. In addition, the solid-state structures of (eta-C5H4SiMe3)2Ti(C = CSiMe3)2 (1) and {(eta5-C5H4SiMe3)2Ti(C = CSiMe3)2}AgNO2 (3d) were established by X-ray crystallography.