for the following products
1,2-bis-(Biphenylphosphino)ethane nickel chloride | Nickel,dichloro[1,2-ethanediylbis[diphenylphosphine-kP]]-(SP-4-2)- (9CI) | [1,2-bis-(Diphenylphosphino)ethane]dichloronickel(II) and 1,2-bis-(Diphenylphosphinoethane)nickel(II) chloride
