Pablo J. Alonso, Larry R. Falvello, Juan Forniés, Antonio Martín, Babil Menjón and Gerardo Rodríguez
The homoleptic, square-planar, d7, 15-electron species [NBu4][NiIII(C6Cl5)4 ] 2 is obtained by low-temperature oxidation of [NBu4]2[NiII(C6Cl5 )4] 1 with Cl2.