Investigations into the Formation and Stability of Cationic Rhodium Diphosphane h 6 -Arene Complexes Christian Fischer, [a] Richard Thede, [b] Hans-Joachim Drexler, [a] Anja Kçnig, [a] Wolfgang Baumann, [a] and Detlef Heller* [a] Chem. Eur. J. 2012, 00,0–0 2012 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim These are not the final page numbers! ÞÞ &1& FULL PAPER DOI: 10.1002/chem.201201587