1: Mg / diethyl ether / 6 h 2: <1,3-Bis(diphenylphosphino)propan>dichloro-nickel(II) / diethyl ether / Heating View Scheme

magnesium; [1,3-bis(diphenylphosphino) propane] dichloronickel(II) 1.) Et2O, reflux, 1 h, 2.) reflux, 15 h; Yield given. Multistep reaction;