Download 1B Ch 21 notes post

Chem 1B
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Chapter 21 Notes: Transition Elements and Coordination Compounds
21.1 The Transition Metals
A. Electron Configurations of Transition Elements and Ions
Ex: Write the condensed electron configurations for each of the following
elements.
a.
V
b.
Cu
c.
Cr
Ex: Write the condensed electron configurations for each of the following cations.
a.
Cu+
b.
Cu2+
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B. Magnetism
Ex: Are each of the following diamagnetic or paramagnetic?
a. NaCl
b. FeCl2
21.3 Coordination Compounds
A. Coordination Compounds
[Co(NH3)6]Cl3 in solid and in solution
B. Types of Ligands
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Pb(EDTA)2–
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C. Coordination Numbers
Ex: What is the coordination number of the metal ion in each of the following complex
ions?
a. Zn(OH)42b. Ni(en)32+
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D. Geometries
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E. Writing Formulas of Coordination Compounds/complex ions
Examples:
a. Write the formula for complex of one Ni2+ ion and four CN– ligands
b. Write the formula for the complex of one Co3+, five NH3, 1 Cl−
c. Write the formula for the bromide salt of the previous complex ion
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F. Naming Coordination Compounds/complex ions
Rules for naming:
Examples:
a. What is the name of [Ti(H2O)6](CN)3?
b. Write the formula for sodium tetrachlorocuprate(I).
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c. What is the name for [Cu(NH3)4]2+?
d. Write the formula for bisethylenediaminedichloroiron (III) phosphate
e. What is the name for [Pt(NH3)3Br]Cl?
f. Write the formula for potassium hexafluorocobaltate (III)
g. Write the name for [Fe(en)2(NO2)2]2SO4
21.4 Isomerism in Coordination Compounds
A. Structural (Constitutional) Isomers:
1. Coordination isomers:
2. Linkage isomers:
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B. Stereoisomers
1. Stereoisomers:
a. Geometric isomers (cis-trans isomers):
b. Optical isomers:
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Example: Does cis-[Co(en)2Cl2]+ have optical isomers?
Does trans-[Co(en)2Cl2]+ have optical isomers?
21.5 The Crystal Field Model
A. Introduction to the model
B. Five d-orbitals in an
octahedral field of ligands
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C. Explanation of Color in Transition metal species
Example: If a solution is red, what is the color of light absorbed?
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Spectrochemical Series of Ligands
(only the top (green) line will be given on tests and quizzes)
Fill in the blanks with the words longer, shorter, smaller or larger
Δ
λ
Ex: rank the following complexes from shortest λ to longest λ of light absorbed:
[Cr(en)3]3+, [Cr(OH)6]3−, [Cr(CO)6]3+
D. Magnetic Properties of Complex Ions
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Lecture Example: H2O is a weak-field ligand and CN− is a strong field ligand.
Draw the orbital splitting diagrams for Co3+ in Co(H2O)63+ and Co(CN)63−. Predict
whether each is a high-spin or a low-spin complex.
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High and Low Spin is only applicable to d4-d7 complexes
d1-d3
d1
d8-d10
d8
d2
d9
d3
d10
E. Splitting in other fields
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21.6 The Biological Importance of Coordination Complexes
Hemoglobin
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