A) Ca2+
B) Fe3+
C) CN–
D) Fe(CN)63-
E) Fe2+
11) What is the charge of the central metal ion in Ca3[Fe(CN)6]2?
A) 0
B) 1+
C) 2+
D) 3+
E) 6+
12) What is the oxidation number of cobalt in [Co(NH3)4F2]?
A) -3
B) +2
C) +1
D) +3
E) +6
13) The charge of the complex ion in [Zn(H2O)3Cl]Cl ________.
A) 0
B) 1–
C) 2+
D) 1+
E) 2–
14) The coordination number for [Zn(H2O)3Cl]Cl is ________.
A) 5
B) 4
C) 2
D) 1
E) 6
15) What is the oxidation state of iron in CaNa[Fe(CN)6]?
A) 0
B) +2
C) +3
D) +4
E) +6
16) What is the oxidation state of iron in K3[Fe(CN)6]?
A) 0
B) +2
C) +3
D) +4
E) +6
17) What is the coordination number of iron in CaNa[Fe(CN)6]?
A) 2
B) 8
C) 4
D) 6
E) 12
22
18) What is the coordination number of cobalt in [Co(NH3)5Cl](NO3)2?
A) 12
B) 8
C) 4
D) 2
E) 6
19) What is the oxidation state of cobalt in [Co(NH3)5Cl](NO3)2?
A) 0
B) 2
C) 3
D) 4
E) 6
20) What is the oxidation state of chromium in [Cr(H2O)4Cl2]+?
A) 0
B) +2
C) +3
D) -2
E) -3
21) What is the coordination number of chromium in [Cr(H2O)4Cl2]+?
A) 8
B) 6
C) 4
D) 2
E) 12
22) The “dentation” of a ligand is defined by ________.
A) how many “dents” or “deceptions” there are in the coordination sphere of a complex species it forms
B) how many electron donor atoms it utilizes to form coordinate bonds to the central metal ion
C) the total number of lone pairs of electrons it possesses
D) how many metal ions it can sequester from solution
E) none of the above
23) EDTA is ________-dantate ligand.
A) mono
B) bi
C) tri
D) tetra
E) hexa
24) What is the metal ion in the porphyrin of heme?
A) iron
B) calcium
C) molybdenum
D) magnesium
E) chlorophyll
25) How many iron atoms are coordinated in a hemoglobin molecule?
A) 1
B) 2
C) 3
D) 4
E) 5
26) The correct name for [Ni(NH3)6](NO3)3 ________.
A) dinitrohexaamminenickel (II)
B) hexaamminenickel (III) trinitrate
C) dinitrohexaamminenickelate (III)
D) hexaamminenickel (II) nitrate
E) hexaamminenickel (III) nitrate
27) The correct name for [Cu(NH3)4(H2O)2]2+ is ________.
A) diwaterquatraamminecopper (II)
B) tetraamminediaquacopper (II)
C) diaquatetraammoniumcopper (II)
D) tetraamminecopper (II) dihydrate
E) copper (II) tetraamminediaqueous
28) The correct name for [Al(H2O)2(OH–)4]– is ________.
A) diwaterquatrahydroxyaluminum
B) tetrahydroxydiaquaaluminum (III)
C) diaquatetrahydroxoaluminate
D) aluminum (IV) hydroxide dihydrate
E) aluminumdihydratetetrahydroxide
29) The correct name for [Co(NH3)5Cl]Cl2 is ________.
A) pentaaminechlorocobalt (III) chloride
B) chloropentaammoniacobalt (II) chloride
C) pentaammoniachlorocobalt (II) chloride
D) cobalt (III) pentaamino trichloride
E) cobalt (III) pentaamminemonochloride chloride
30) The names of complex anions end in ________.
A) -o
B) -ium
C) -ate
D) -ous
E) –ic
31) The correct name for Na3[CoF6] is ________.
A) trisodium hexakisfluorocobalt (III)
B) trisodium hexakisfluorocobalt (II)
C) trisodium hexakisfluorocobalt (IV)
D) sodium hexafluorocobaltate (III)
E) sodium hexafluorocobaltate (IV)
32) Triphenylphosphine is often given the abbreviated formula PPh3. The correct name for Rh(PPh3)3Cl
is ________.
A) chlorotriphenylphosphinerhodium
B) chlorotriphenylphosphinerhodium (I)
C) tris(triphenylphosphine)chlororhodium (I)
D) chlorotris(triphenylphosphine)rhodium (I)
E) chlorotris(triphenylphosphine)rhodate (I)
33) In ________, the bonds are the same but the spatial arrangement of the atoms is different.
A) structural isomers
B) linkage isomers
C) coordination-sphere isomers
D) stereoisomers
E) resonance structures
34) A geometrical isomer with like groups located on opposite sides of the metal atom is denoted with the
prefix ________.
A) cis-
B) trans-
C) bis-
D) tetrakis-
E) d–
35) The complex [Zn(NH3)2Cl2]2+ does not exhibit cis-trans isomerism. The geometry of this complex
must be ________.
A) tetrahedral
B) trigonal bipyramidal
C) octahedral
D) square planar
E) either tetrahedral or square planar
36) How many isomers exist for the octahedral complex ion [Co(NH3)4F2]+?
A) 1
B) 2
C) 3
D) 4
E) 5
37) Trans-[Fe(H2O)2Cl4]2- must be ________.
A) tetrahedral
B) octahedral
C) square planar
D) trigonal bipyramidal
E) linear
38) Linkage isomerism can only occur ________.
A) in cis-isomers of octahedral complexes
B) with cobalt complexes
C) with coordination number 6
D) with tetrahedral complexes
E) with ligands that have more than one possible donor atom
39) Metals with ________ electron configurations characteristically form diamagnetic, square planar
complexes.
A) d0
B) d9
C) d6
D) d8
E) d10
23.3 Algorithmic Questions
1) Which mineral contains mercury?
A) cinnabar
B) sphalerite
C) rutile
D) chromite
E) cassiterite
2) Which one of the following species is paramagnetic?
A) Cu
B) Ne
C) Y3+
D) Ra
E) Zn2+
3) Which element has the largest bonding atomic radius?
A) scandium
B) titanium
C) vanadium
D) chromium
E) manganese
4) What is the most common geometry found in five-coordinate complexes?
A) trigonal bipyramidal
B) octahedral
C) tetrahedral
D) linear
E) icosahedral
5) The coordination number of cobalt in CoCl3 ∙ 6NH3 is ________.
A) 6
B) 7
C) 8
D) 1
E) 2
6) What is the oxidation number of Ni in [Ni(CN)4]2-?
A) +2
B) +1
C) 0
D) +3
E) +4
7) Which ion shown below does not exist?
A) Y4+
B) Y2+
C) Y+
D) Zr4+
E) Nb3+
8) Which ion shown has empty 5s orbitals?
A) Mo2+
B) Y3+
C) Zr4+
D) Nb2+
E) All choices have empty 5s orbitals.
9) Which ion shown has empty 4d orbitals?
A) Y3+
B) Zr2+
C) Nb+
D) Mo3+
E) Zr3+
10) A ligand with a single donor atom is called ________.
A) monodentate
B) bidentate
C) polydentate
D) a chelate
E) a chelon
11) Which of the following is not a chelating agent?
A) water
B) ethylenediamine
C) ortho-phenanthroline
D) carbonate ion
E) triphosphate ion
12) How many bonds can carbonate ion form to a metal ion?
A) 2
B) 3
C) 4
D) 1
E) 5
13) Which of the following is a polydentate ligand?
A) ethylenediamine
B) water
C) cyanide ion
D) nitrite ion
E) ammonia
14) The ligand with the formula Br– is named ________ in complexes with transition metals.
A) bromo
B) bromide
C) fluoro
D) carbonato
E) azido
31
15) The ligand with the name aqua when used in complexes with transition metals has the formula
________.
A) H2O
B) H2O2
C) HO–
D) N3–
E) H3O+
16) Which one of the following is the correct formula for pentaamminechlorocobalt (III) chloride?
A) [Co(NH3)5Cl]Cl2
B) [Co(NH3)4Cl]Cl2
C) [Co(NH3)6Cl]Cl2
D) [Co(NH3)5]Cl4
E) [Cl(NH3)5Co]Co2
17) Which of the following can form both high- and low-spin octahedral complexes?
A) Ru2+
B) Cr3+
C) Cr4+
D) Zr
E) Ag+
18) How many d electrons are associated with the metal ion in [Cr(NH3)6]3+?
A) 3
B) 4
C) 2
D) 1
E) 0
23.4 Short Answer Questions
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1) Draw a diagram of the short-hand ground state electron configuration of zinc.
2) Most transition metal ions contain partially occupied ________ subshells.
3) A substance is ________ if its ions or atoms have one or more unpaired electrons.
4) The two more common oxidation states of chromium are ________ and ________.
5) ________ arises when the unpaired electrons of the atoms or ions in a solid are influenced by the
orientations of the electrons of their neighbors.
6) What is the oxidation state of the iron atom in CaNa[Fe(CN)6]?
7) The most common coordination numbers are ________.
8) What is the coordination number of the iron atom in CaNa[Fe(CN)6]?
9) Six-coordinate complexes generally have ________ geometry.
10) The number of “free” chloride ions in an ionic coordination compound can be determined by treating
the compound with ________.
11) The secondary valence in metal ion complexes is called the ________.
12) Werner’s theory of primary and secondary valences for transition metal complexes has given us the
concepts of ________ and ________.
13) Transition metal ions with empty valence orbitals act as ________.
14) What is the oxidation number of the central metal in [Mo(H2O)5NO3]Cl2
15) Define the chelate effect.
16) The chelate effect is enhanced by polydentate ligand binding because of the change in ________.
17) List three of the ten transition metals required for human life.
18) Myoglobin has ________ heme group(s) that bind(s) ________.
19) In photosynthesis, ________ moles of photons are required to form one mole of ________.
20) In the leaves of plants, visible light is absorbed by a compound known as ________, and is aided by a
________ ion bonded to a porphyrin ring.
21) What is the mechanism used in humans to combat blood bacterial growth via deprivation of iron?
22) A large difference in formation constant (Kf) of a poly- versus monodentate ligand is called ________.
23) A compound that can occupy two coordination sites is a (an) ________.
24) The porphyrin compound that contains Mg (II) is called ________.
25) The transport of iron into bacteria is facilitated by the formation of the complex ________.
26) Name the compound: K2[Cr(H2O)4(CO3)2].
27) Name Na [Ru(H2O)2 (C2O4)2].
28) Two compounds have the same formula and contain an SCN– ligand. In one compound the SCN–
ligand is bonded to the metal atom via the N atom and in the other it is bonded via the S atom. These two
compounds are examples of ________ isomers.
29) Non superimposable isomers are ________ isomers.
30) How can high-spin and low-spin transition metal complexes be distinguished from each other?
23.5 True/False Questions
1) If chloride is a ligand to a transition metal, it will not be precipitated by silver nitrate.
2) The chelate effect must always occur with positive enthalpy change.
3) The color of hemoglobin changes from purple to red when water displaces oxygen on the molecule.
4) The heme unit of myoglobin is bound to the protein via a nitrogen-containing ligand.
5) To separate racemic mixtures, the isomers must be in a chiral environment.
6) Green and orange are complementary colors.
7) The energy of a metal ligand complex is higher than the energy of the separated components.
23.6 Essay Questions
1) What is the purpose of adding sodium tripolyphosphate to a detergent?
2) What colors of light does chlorophyll-a absorb?
3) How does an elevated body temperature deprive some bacteria in the body of iron?
4) What is a siderophore?
5) What is meant by the prefix tetrakis-, and when is it used?
6) Name the compound, Ca[AlH4]2.
7) Name the compound, [Os(en)3]2 [NiCl2Br2]3.
8) Name the compound, Cu(H2O)42+.
9) In what two ways can an object appear blue?