Metallcarbonyl‐Synthesen, XII. Tetracarbonyl(η5‐pentamethylcyclopentadienyl)vanadium

Metalcarbonyl Syntheses, XII. Tetracarbonyl(η5‐pentamethylcyclopentadienyl)vanadium The hitherto unknown halfsandwich complex tetracarbonyl(η5‐pentamethylcyclopentadienyl)vanadium (3) is easily accessible in 45% yield upon reaction of hexacarbonylvanadium (1) with pentamethylcyclopentadiene (2). Photolysis of 3 as well as reduction and subsequent protonation yield the dinuclear derivative 4 of composition (η5‐C5Me5)2V2(CO)5.