Fig. 6. 6-membered transition structures showing key bond lengths for (a) ^RuTS_2a–3a, (b) ^CuTS_1a–3b and (c) ^PdTS_2a–3a with a benzoate counter ion and (d) ^RuTS_2a–3a, (e) ^CuTS_1a–3b, and (f) ^PdTS_2a–3a with a 4-nitrobenzoate counter ion. All distances are in Å.