Chem 172/273
Problem Set 1 Key
2.19
a. 3p electron of P:
(1s)2(2s2p)8(3s3p)5
Shielding = s = 4(0.35) + 8(0.85) + 2(1) = 10.2
Z* = Z s = 15 - 10.2
Z* = 4.8
b. 4s electron in Co:
(1s)2(2s2p)8(3s3p)8(3d)7(4s)2
s = 1(0.35) + 15(0.85) + 10(1) = 23.1
Z* = 27 23
Symmetry adapted linear
combinations: projection
operator technique and
MO diagrams
Carter 5, MT 5.4.4-5.4.6
MO diagram of CH4
2
Constructing MO diagrams
1. Bonding MOs always lie lower in energy than the antibonding MOs
formed from the same AOs.
2. Non-b
Manipulating MO
diagrams
donor ligands in Oh
2
donors and acceptors in
Oh
3
D4h MO diagram
4
Metal-metal bonding
5
Vibrational
spectroscopy
MT 4.4.2, Carter 6
Types of vibrations
http:/teaching.shu.ac.uk/hwb/chemistry/tutorials/molspec/irspec1.htm
7
Nor
Vibrational
spectroscopy
MT 4.4.2, Carter 6
Stretching modes
1.
2.
3.
4.
Bonds can be used to describe stretching vibrations.
Only bonds of the same type are considered together.
Determine the representation corresponding to the CO bond
stretching vibrati
Group subgroup
relationships
Carter 3.3
2
When point groups are related as group and subgroup, their irreducible
representations are also related.
3
Correlation diagrams
C4v
A1
A2
B1
B2
E
A2
A1
B2
B1
E
C4v
A1
A2
B1
B2
E
E
1
1
1
1
2
2C4
C2
2v
2d
1
1
-1
-1
Electron counting and
the 18 electron rule
MT chapters 13, 14
Ligands in organometallic
chemistry
Neutral 2e donors: PR (phosphines), CO (carbonyl), R C=CR
3
2
(alkenes), RCCR (alkynes, can also donate 4e), NCR (nitriles)
Anionic 2e donors: X- (halide), C
Advanced Inorganic Chemistry
Paula Diaconescu: [email protected]
Office hours will be held after each lecture.
www.inorganic-chemistry.net
TAs discussion/office hours
Stephanie Quan [email protected]
Mark Abubekerov [email protected]
Discussion
COMPLEXES OF
ANIONIC, MULTIPLECARBON LIGANDS
Conjugated arenes
Synthesis of metallocenes
3
Reactivity
Electrophilic aromatic substitution: faster than for benzene
Reactions of paramagnetic metallocenes
MO diagram of ferrocene
MOs in Cp-
MOs in ferrocene
M
NAME:
ID:
Chem 171
Midterm Examination
University of California, Los Angeles
Winter 2014
Instructor: Dr. Franklin P. Ow
You have 50 minutes. A non-graphing, scientific calculator and an unassembled modeling kit are
allowed. A point group flowchart and a t
Chem 172/273
Problem Set 2 Key
4.29
See Figure 4.17. Although the breaks in these curves occur at the expected radius ratio
for anion-anion contact, these are not exactly the points at this one would expect the
transitions to occur because of the inherent
Chem 172/273
Homework #4 Key
9.1
A lewis acid (A) is an electron pair acceptor; a Lewis base (B) is an electron pair donor.
A few examples are:
9.1: H2O(B) + H2O(A)
9.3: H3SO4+(A) + HSO4-(B)
9.6: CaO(B) + H2O(A)
H3O+ + OH2H2SO4
Ca2+ + 2OH-
9.8: Fe2O3(B) +
Discussion: Tu (SQ) and Th (MA), 1-2 pm, YH 2200
Office hours: Tu (SQ) and Th (MA), 10-11 am, Geology 3656
Chapters 1, 6, 9 (Miessler &Tarr)
INTRODUCTION
1
Lewis acid-base concept and
frontier orbitals
Frontier
molecular
orbitals are a
few occupied
and
un
Matrices
MT 4.3.1 4.3.2, Carter 1.2, 1.3
http:/www.mathsisfun.com/algebra/matrix-introduction.html
1
Outline
Matrices
Definitions
Combinations of matrices
Transformations
Matrix notations
Multiple operations
2
Matrices
Definition of a matrix: a matrix is
Classes of symmetry
operations
All the elements of a given class behave identically in the properties
covered by the character table.
Two operations belong to the same class when one may be replaced by the
other in a new coordinate system that is accessib
Point groups
MT 4.2, Carter 1.5 1.7
Carter 1.4: optional
http:/symmetry.otterbein.edu/gallery/
http:/www.chemeddl.org/resources/models360/models.php
2. No axes of rotation?
2
3. Even-order improper axis
3
4
5
5. nC2 Cn
6
7
8
Allene symmetry elements
Note:
Hybrid orbitals: the
framework in AB4 (Td)
1
Localized molecular orbital
approach
The localized molecular orbital (MO) scheme for CH4 suggests that
4 pairs of electrons are localized in degenerate MOs. The
equivalence of the bonding MOs is artificial sin
Glycolysis
Learning Objectives:
Explain why each step of glycolysis is necessary
Distinguish between G and Go
Discuss what is meant by the term far from equilibrium
reactions (sometimes called irreversible reactions), and
discuss it in terms of specifi