Ch.23 - Transition Metals and Coordination Chemistry
뒤로
- Complete the exercises below. Consider an octahedral complex MA₃B₃. How many geometric isomers are expected for this compound? Will any of the isomers be optically active? If so, which ones?
문제 42
- Complete the exercises below. Determine if each of the following complexes exhibits geometric isomerism. If geometric isomers exist, determine how many there are. c. octahedral [Fe(o-phen)₂ Cl₂]⁺.
문제 43
- Complete the exercises below. Determine if each of the following complexes exhibits geometric isomerism. If geometric isomers exist, determine how many there are. c. Square-planar [Pd(en)(CN)₂].
문제 44
- Complete the exercises below. Determine if each of the following metal complexes is chiral and therefore has an optical isomer: b. octahedral trans-[Ru(bipy)₂Cl₂].
문제 45
- Complete the exercises below. Determine if each of the following metal complexes is chiral and therefore has an optical isomer: c. octahedral cis-[V(en)₂ClBr].
문제 46
- Complete the exercises below. Determine if each of the following metal complexes is chiral and therefore has an optical isomer: b. octahedral [Ni(en)(NH₃)₄]²⁺.
문제 46
- Complete the exercises below. Determine if each of the following metal complexes is chiral and therefore has an optical isomer: a. square planar [Pd(en)(CN)₂].
문제 46
- Complete the exercises below. a. If a complex absorbs light at 610 nm, what color would you expect the complex to be? b. What is the energy in joules of a photon with a wavelength of 610 nm? c. What is the energy of this absorption in kJ/mol?
문제 47
- Complete the exercises below. a. A complex absorbs photons with an energy of 4.51 x 10⁻¹⁹ J. What is the wavelength of these photons? b. If this is the only place in the visible spectrum where the complex absorbs light, what color would you expect the complex to be?
문제 48
- Complete the exercises below. Identify each of the following coordination complexes as either diamagnetic or paramagnetic: a. [ZnCl₄]²⁻ b. [Pd(NH₃)₂ Cl₂]
문제 49
문제 52a
The lobes of which d orbitals point directly between the ligands in a. octahedral geometry,
문제 52b
The lobes of which d orbitals point directly between the ligands in b. tetrahedral geometry?
- Complete the exercises below. a. Sketch a diagram that shows the definition of the crystal-field splitting energy (∆) for an octahedral crystal-field. b. What is the relationship between the magnitude of ∆ and the energy of the d-d transition for a d¹ complex? c. Calculate ∆ in kJ/mol if a d¹ complex has an absorption maximum at 545 nm.
문제 53
문제 54
As shown in Figure 23.26, the d-d transition of [Ti(H2O)6]³⁺ produces an absorption maximum at a wavelength of about 500 nm .
a. What is the magnitude of ∆ for [Ti(H2O)6]³⁺ in kJ/mol?
b. How would the magnitude of ∆ change if the H2O ligands in [Ti(H2O)6]]³⁺ were placed with NH3 ligands?
- Complete the exercises below. Give the number of (valence) d electrons associated with the central metal ion in each of the following complexes: a. K₃ [TiCl₆], b. Na₃ [Co(NO₂)₆], c. [Ru(en)₃] Br₃, d. [Mo(EDTA)] ClO₄, e. K₃ [ReCl₆].
문제 57
- Complete the exercises below. Give the number of (valence) d electrons associated with the central metal ion in each of the following complexes: a. K₃[Fe(CN)₆] b. [Mn(H₂O)₆](NO₃)₂ c. Na[Ag(CN)₂] d. [Cr(NH₃)₄Br₂]ClO₄ e. [Sr(EDTA)]²⁻
문제 58
문제 59
A classmate says, “A weak-field ligand usually means the complex is high spin.” Is your classmate correct? Explain.
문제 60
For a given metal ion and set of ligands, is the crystal-field splitting energy larger for a tetrahedral or an octahedral geometry?
- Complete the exercises below. For each of the following metals, write the electronic configuration of the atom and its 2+ ion: a. Mn. 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? b. Ru. 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? 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?
문제 61
- Complete the exercises below. For each of the following metals, write the electronic configuration of the atom and its 3+ ion: a. Fe. 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?
문제 62
- Complete the exercises below. For each of the following metals, write the electronic configuration of the atom and its 3+ ion: 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?
문제 62
- Complete the exercises below. For each of the following metals, write the electronic configuration of the atom and its 3+ ion: b. Mo. 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?
문제 62
- Complete the exercises below. Draw the crystal-field energy-level diagrams and show the placement of d electrons for each of the following: c. [Ru(NH₃)₅(H₂O)]²⁺ (a low-spin complex).
문제 63
- Complete the exercises below. 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).
문제 63
문제 64a,b
Complete the exercises below. Draw the crystal-field energy-level diagrams and show the placement of electrons for each of the following complexes:
a. [VCl6]3–,
b. [FeF6]3– (a high-spin complex),
문제 64d
Draw the crystal-field energy-level diagrams and show the placement of electrons for each of the following complexes:
d. [NiCl4]2+ (tetrahedral),
- Complete the exercises below. The complex [Mn(NH₃)₆]²⁺ contains five unpaired electrons. 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?
문제 65
- Complete the exercises below. The ion [Fe(CN)₆]³⁻ has one unpaired electron, whereas [Fe(NCS)₆]³⁻ has five unpaired electrons. From these results, what can you conclude about whether each complex is high spin or low spin? What can you say about the placement of NCS⁻ in the spectrochemical series?
문제 66
- Complete the exercises below. Explain why the transition metals in periods 5 and 6 have nearly identical radii within each group.
문제 68
문제 71a
Sketch the structure of the complex in each of the following compounds and give the full compound name:
a. cis-[Co(NH3)4(H2O)2] (NO3)2