SEARCH Articles Figures Tables Coupling reactions tetrakis nickel Nickel, powder tetrakis[phosphorus Nickel, tetrakis catalyst Nickel, tetrakis catalyst Ullmann reaction Nickel, tetrakis synthesis Tetrakis (triethyl phosphite)nickel(O) Tetrakis (triphenyl phosphite)nickel(O) Tetrakis(triphenylphosphine)nickel