Fig. 3

X-ray structures of the cationic parts of 2 (a), 3 (b), 4 (c), and 5 (d). Thermal ellipsoids are set at the 50% probability level. The phenyl groups in the PPh3 moieties are omitted for clarity

X-ray structures of the cationic parts of 2 (a), 3 (b), 4 (c), and 5 (d). Thermal ellipsoids are set at the 50% probability level. The phenyl groups in the PPh3 moieties are omitted for clarity