Chapter 23 – Transition Metals Chemistry and Coordination Compounds
42. Which of the following complexes has optical (chiral) isomers?
43. The number of geometrical isomers and optical isomers of the complex ion [Co(en)3]3+
are, respectively,
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
44. A complex with the composition [MA2B2]X2 is found to have no geometrical isomers.
Both A and B are monodentate ligands. The structure of the complex is
45. Which of these ligands produces the strongest crystal field?
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
46. Which of these ligands produces the weakest crystal field?
47. In the complex ion [ML6]n+, Mn+ has five d electrons and L is a strong field ligand.
According to crystal field theory, the magnetic properties of the complex ion correspond to
how many unpaired electrons?
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
48. In the complex ion [ML6]n+, Mn+ has seven d electrons and L is a strong field ligand.
According to crystal field theory, the magnetic properties of the complex ion correspond to
how many unpaired electrons?
49. In the complex ion [ML6]n+, Mn+ has seven d electrons and L is a weak field ligand.
According to crystal field theory, the magnetic properties of the complex ion correspond to
how many unpaired electrons?
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
50. In the complex ion [ML6]n+, Mn+ has six d electrons and L is a weak field ligand.
According to crystal field theory, the magnetic properties of the complex ion correspond to
how many unpaired electrons?
51. Which of these complex ions would absorb light with the longest wavelength?
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
52. Which one of these complex ions would absorb light with the shortest wavelength?
53.
Which of these electron energy level patterns would absorb light with the shortest wavelength?
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
54. Two well-known complex ions containing Ni are [Ni(H2O)6]2+, which is green, and
[Ni(en)3]2+, which is purple. Which one of these statements is true?
55. Two complex ions containing Ni are [Ni(NH3)6]2+, which is blue, and [Ni(en)3]2+, which is
purple. Which one of these statements is true?
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
56. How many unpaired electrons are there in the complex ion [Mn(CN)6]3–?
57. The ion [Co(NH3)6]2+ is octahedral and high spin. This complex is
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
58. How many unpaired electrons does the manganese ion have in [Mn(CN)6]4–?
59. Consider the [CoCl6]4– ion. Determine which responses are true statements.
I. The oxidation number of Co is –4.
II. The coordination number of cobalt is 6.
III. It is paramagnetic.
IV. It is a low-spin complex.
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
60. Labile complexes are coordination complexes that
61. Ethylenediaminetetraacetic acid (EDTA) is
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
62. Cis-platinum complexes are
63. What is the oxidation number of Fe in [Fe(CN)6]4–?
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
64. What is the oxidation number of Co in the complex Na[Co(H2O)2Cl4]?
65. What is the oxidation number of Co in the complex [Co(H2O)4Cl2]Cl?
Chapter 23 – Transition Metals Chemistry and Coordination Compounds
66. What is the oxidation number of Co in the complex Co(H2O)3Cl3?