Reactions with dithioacetals

With the cydopentadienyl ligand, vanadium forms the simple sandwich compound, "vanadocene , [V( - -C5Hj)2] which is dark violet, paramagnetic (3 unpaired electrons) and extremely air-sensitive. Oxidative addition reactions are possible and provide compounds such as [V()9 -CjH5)2C1 ] (n = 1,2,3) and LV(rj -C5H5)2R2], while it.s reaction with dithioacetic acid produces the dark-brown tetramer [V4(fj -C H5)4( 3-S4), Fig. 22.11. " With four V " atoms, eight electrons are available for six V-V bonds and the implied bond order of 2/3... 

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