How are dioxygen adducts of cobaltocenes prepared?

Give a suitable chemical equation for the preparation of molybdenocene. Gives its reaction with
ethylene.

With the help of a suitable example explain what fluxional organanometallic
compounds are. With the help of NMR studies how their presence was confirmed?

With the help of a suitable diagram explain the trend of paramagnetic moments of La3+ and the
lanthanoid ions at 300K. Why is the chance of superexchange interaction less in lanthanoid
complexes?
 

Give the octahedral as well as tetrahedral field electronic configuration for the Cr3+ and Mn2+
ions. Which site will be preferred by these ions, octahedral or tetrahedral? Justify your answer.

 With a suitable example explain intermolecular antiferromagnetism. Give its mechanism for the
case of direct metal-metal interaction. Give suitable illustration

Give the classification of organotransition metal alkyls and aryls along with suitable
examples for each type.