1.1: Mg / tetrahydrofuran 1.2: dichloro[1,3-bis(diphenylphosphino)ethane]nickel(II) / tetrahydrofuran 2.1: Br2; Fe; I2 3.1: Mg / tetrahydrofuran 3.2: dichloro[1,3-bis(diphenylphosphino)ethane]nickel(II) / tetrahydrofuran 4.1: SeO2; 90 percent aq. AcOH; H2SO4 View Scheme

1.1: Br2; Fe; I2 2.1: Mg / tetrahydrofuran 2.2: dichloro[1,3-bis(diphenylphosphino)ethane]nickel(II) / tetrahydrofuran 3.1: SeO2; 90 percent aq. AcOH; H2SO4 View Scheme

1.1: Mg / tetrahydrofuran 1.2: dichloro[1,3-bis(diphenylphosphino)ethane]nickel(II) / tetrahydrofuran 2.1: SeO2; 90 percent aq. AcOH; H2SO4 View Scheme

1.1: Mg / tetrahydrofuran 1.2: dichloro[1,3-bis(diphenylphosphino)ethane]nickel(II) / tetrahydrofuran 2.1: Br2; Fe; I2 3.1: Mg / tetrahydrofuran 3.2: dichloro[1,3-bis(diphenylphosphino)ethane]nickel(II) / tetrahydrofuran 4.1: SeO2; 90 percent aq. AcOH; H2SO4 View Scheme