Photochemical route to unusual tri-tungsten ferrocenylacetylene cluster [W3{μ-η2,η2- (H)CCFc}2(CO)12] and a dimetallacyclodecatetraene [W2{μ-η2,η2,η2,η2- (Fc)CC(H)C(H)C(Fc)C(Fc)C(H)C(H)C(Fc)}(CO)6]

Alkyne-Functionalized Zirconocene Complexes: Synthesis, Structures, and Reactivities

“…Cyclopentadienyl ligands with one or more alkyne groups as the ring substituents or side chain functional groups have been extensively used to synthesize alkyne-functionalized cyclopentadienyl transition-metal complexes. − The alkyne group in these complexes acts not only as a donor of two π electrons to coordinate with the Lewis acidic metal center but also as a reactive group to undergo further reaction. , For double-alkyne-functionalized metallocene complexes, some metal carbonyl complexes and other reagents can couple the two alkyne groups to form distinct bridged metallocene complexes . For example, reactions of 1,1′-dialkynylferrocene with Ru 3 (CO) 12 , KOH, and ArOH yielded metallacycles or [4]ferrocenophanes. − Up to now, alkyne-functionalized cyclopentadienyl transition-metal complexes have mainly focused on ferrocene and ruthenocene derivatives; other metal complexes with an alkyne-functionalized cyclopentadienyl ligand are very limited.…”