Problem Set III
Chem 113A, Fall Quarter 2015
Due October 20, 2015, at the beginning of class
For example, A = d is
Operators are often denoted by a caret, such as in O.
= x multiplies
an operator that differentiates whatever comes after i
ANIONIC, MULTIPLECARBON LIGANDS
Synthesis of metallocenes
Electrophilic aromatic substitution: faster than for benzene
Reactions of paramagnetic metallocenes
MO diagram of ferrocene
MOs in Cp-
MOs in ferrocene
Advanced Inorganic Chemistry
Paula Diaconescu: firstname.lastname@example.org
Office hours will be held after each lecture.
TAs discussion/office hours
Stephanie Quan email@example.com
Mark Abubekerov firstname.lastname@example.org
Electron counting and
the 18 electron rule
MT chapters 13, 14
Ligands in organometallic
Neutral 2e donors: PR (phosphines), CO (carbonyl), R C=CR
(alkenes), RCCR (alkynes, can also donate 4e), NCR (nitriles)
Anionic 2e donors: X- (halide), C
When point groups are related as group and subgroup, their irreducible
representations are also related.
MT 4.4.2, Carter 6
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
donor ligands in Oh
donors and acceptors in
D4h MO diagram
MT 4.4.2, Carter 6
Types of vibrations
Symmetry adapted linear
operator technique and
Carter 5, MT 5.4.4-5.4.6
MO diagram of CH4
Constructing MO diagrams
1. Bonding MOs always lie lower in energy than the antibonding MOs
formed from the same AOs.
Hybrid orbitals: the
framework in AB4 (Td)
Localized molecular orbital
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
MT 4.2, Carter 1.5 1.7
Carter 1.4: optional
2. No axes of rotation?
3. Even-order improper axis
5. nC2 Cn
Allene symmetry elements
Classes of symmetry
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
MT 4.3.1 4.3.2, Carter 1.2, 1.3
Combinations of matrices
Definition of a matrix: a matrix is
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)
Lewis acid-base concept and
orbitals are a
Chemistry Midterm Two Cheat Sheet
Lecture Nine: Mass Spec Part One
1. How does Mass Spec work?
a. Reveals mass of molecule
3. M+1? Contributors?
a. Reveals number of carbon (divide by 1.1)
b. Contributors- C, N, S
4. M+2? Contributors?
a. Reveals pr
Chemistry 14C Midterm Mini Cheat Sheet
Sample is hit with high eenergy, which causes it
to become a radical
cation. The negative
plate then pushes it into
a magnetic field. Its flight
path is relative to its
Chemistry Third Midterm Cheat Sheet
Lecture 18: C-NMR, 2D-NMR, and MRI
1. Any nucleus with a spin quantum number and odd number of protons or
neutrons can have NMR
2. C-NMR (with Carbon 13)
a. Number of chemical signals= equivalent carbon and molecular
Potential Energy of Chemical Reactions Worksheet
For the two combustion reactions shown below, calculate the change in potential energy using the following
equation and the table of average bond enthalpies (potential energy).
Change in P.E. = (tota
1. Enthalpy(H): the amount of heat ( _ ) released or absorbed at a constant pressure
80.00 kJ.°C". If the internal temperature of the calorimeter increases from 23.16 0C to 25.13 “Q
what is the change in internal energy for the process? (8P1)
AU = q + w lpt
w = 0 (bomb calorimeter) 1 pt
AUSyS = qsys lpt
sts = 'Qcalorimctcr 113‘
= -CAT 1 p
Q1, When eating large amounts of candy, people can develop a “sugar rush.” A typical sugar found
in candy is glucose which will react with oxygen to form carbon dioxide and water.
Suppose on Halloween a child weighing 35 kg (which is mostly water) e
Q1. How much heat is required to convert a 42.30 3 block of ice at -5.042 °C into
I , 1. _ 1_ mm vapor at 150.35°c 7 (22m)
Raising the temperature of the ice from —5.042 °C to 0.00 °C.
‘iwkéi‘ 31: if"