3+ (d) [Mo(EDTA)]CIO4, (e) K3[ReCl6]. 23.58 Give the number of (valence) d electrons associated with the central metal ion in each of the following complexes: (a) K3[Fe(CN),], (b) [Mn(H2O)6](NO3)2, (c) Na[Ag(CN)2], (d) [Cr(NH3)4Br2]C1O4, (e) [Sr(EDTA)]²-. 23.59 A classmate says, "A weak-field ligand usually means the complex is high spin." Is your classmate correct? Explain 23.60 For a given metal ion and set of ligands, is the crystal-field split ting energy larger for a tetrahedral or an octahedral geometry Brз, gth for e of ced ite, СОз for- ion und 23.61 For each of the following metals, write the electronic con figuration of the atom and its 2+ ion: (a) Mn, (b) Ru, (c) Rh. Draw the crystal-field energy-level diagram for the d orbitals of an octahedral complex, and show the placement of the d electrons for each 2+ ion, assuming a strong-field complex. How many unpaired electrons are there in each case? cron ased the 23.62 For each of the following metals, write the electronic con- figuration of the atom and its 3+ ion: (a) Fe, (b) Mo, (c) Co. Draw the crystal-field energy-level diagram for the d orbitals of an octahedral complex, and show the placement of the d electrons for each 3+ ion, assuming a weak-field complex. How many unpaired electrons are there in each case? 23.63 Draw the crystal-field energy-level diagrams and show the placement of d electrons for each of the following: (a) [Cr(H2O)6]²+ (four unpaired electrons), (b) [Mn(H2O)6!" (a high-spin complex), (c) [Ru(NH3)5(H,O)]2+ (a low-spin complex), (d) [IrCl6]2- (a low-spin complex), (e) [Cr(en)3]" (f) [NiF6]ª. 73+ 4- 23.64 Draw the crystal-field energy-level diagrams and show the placement of electrons for the following com- plexes: (a) [VCI6]3, (b) [FeF6]3- (a high-spin complex), (c) [Ru(bipy)3]* (a low-spin complex), (d) [NiCl4]²- (tetra- hedral), (e) [PtBrg]²¯, (f) [Ti(en)3]*". trons. Sketch the energy-level diagram for the d orbitals, and indicate the placement of electrons for this complex ion. Is the ion a high-spin or a low-spin complex? 23.65 The complex [Mn(NH3)6]²* contains five unpaired elec- delectron, whereas results, electron,