Corrigendum: Nitrile–Nitrile CC Coupling at Group 4 Metallocenes to Form 1‐Metalla‐2, 5‐diaza‐cyclopenta‐2, 4‐dienes: Synthesis and Reactivity. Issue 43 (19th October 2015) - Becker, Lisanne; Arndt, Perdita; Jiao, Haijun; Spannenberg, Anke; Rosenthal, Uwe