in  benzene-d6  thermolysis of a soln. of complex in C6D6;;   

 in  cyclohexane  Pyrex thermolysis tube was charged with complex and evacuated, cyclohexane was added under Ar atm.; the tube was sealed under vac, and was heated at 165°C for 35 min;; oil was solidified upon addn. of methanol, crystd. from CH2Cl2 at -10°C; recrysd. from methanol-THF; elem. anal.;;