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23 Transition Metals and Solutions to Exercises Coordination Chemistry 23.59 Analyze/Plan. Follow the logic in Sample Exercise 23.9. Solve. (a) Mn: (b) Ru: [Kr]5s¹4d⁷ (c) Rh: [Kr]5s¹4d⁸ Mn²⁺: [Ar]3d⁵ Ru²⁺: [Kr]4d⁶ 4 1 unpaired electron 0 unpaired electrons 1 unpaired electron 23.60 (a) Ru: [Kr]5s¹4d⁷ (b) Mo: [Kr]5s¹4d⁵ (c) Co: [Ar]4s²3d⁷ [Kr]3d³ [Ar]3d⁶ 5 unpaired electrons 3 unpaired electrons 4 unpaired electrons 23.61 Analyze/Plan. All complexes in this exercise are six-coordinate octahedral. Use the definitions of high-spin and low-spin along with the orbital diagram from Sample Exercise 23.9 to place electrons for the various complexes. Solve. (a) (b) 11 (c) 111 d⁴, high spin d⁵, high spin low spin (d) (e) (f) 11 111 low spin d³ 23.62 (a) (b) 11 (c) 11 d² d⁵, high spin d⁵, low spin 11 (d) (e) (f) d⁸ d⁸ d² 706