in benzene-d6 (Cp2Zr(H)Cl)x placed in an NMR tube and suspended with a soln. of Cp2Zr(Cl)CPh2OCH3 in benzene-d6; mixt. heated at 55°C for 7 h;; not isolated; reaction followed by NMR spectroscopy;;

in benzene-d6 (Cp2ZrH2) placed in NMR tube and suspended with a soln. of Cp2Zr(Cl)CPh2OCH3 in benzene-d6; mixt. heated at 55°C for 2 h;; not isolated; react. followed by NMR spectroscopy;;