Chemistry 4343     Inorganic Chemistry II     Spring 2003
MTWF 1:00 pm – 1:50 pm, Rm 201   Science Complex

Instructor: Dr. Danny McGuire
Office Hrs: MWF 9:00-11:00 am;  T 10:00-11:00 am or by appointment, Room SC 225F

Textbook: Mandatory:  Descriptive Inorganic Chemistry, Rayner-Canham, Geoff

Prerequisite: CHEM 4333 (Inorganic Chemistry I)

Exams/Quizzes:     Exam 1, February 7, Friday
                            Exam 2, March 14, Friday
                            Exam 3, April 18, Friday
                            Comprehensive Final Exam, May 9, 1:00 – 3:00 pm, Friday

Quizzes will be given every Wednesday or Friday toward the end of class (except during exam weeks).

                    Grading: 3 one-hour exams @ 100 pts each  300 (41.6%)
                    1 comprehensive final exam @ 200 pts          200 (27.7%)
                    10 quizzes (drop two lowest) 15 pts each      120 (16.7%)
                     2 Projects (Due April 21-25)                       100  (13.9%)
                                                                  total possible  720 (100.0%)

Grading Grades will be assigned as follows:
Scale:  A:  90-100%; B:  80-89%; C:  70-79%; D:  60-69%; F: <60%
  A:  716 pts.    B:  636 pts.  C: 556 pts.  D:  476 pts.  F: <476 pts.
No make-up exams or extra assignments will be given to compensate for a poor grade.  Only illness, court dates, and University sponsored events are acceptable excuses for missing an exam.  You must contact Dr. McGuire in advance if an exam is going to be missed.

Questions about the grading of any assignment should be brought to the instructor within one week after the assignment is returned.

Drop Policy: Last day to withdraw with an automatic grade of W:  Friday, April 11
                      Last day to withdraw from this course with assigned grades of W or F:  Friday, April 25
                      No I’s will be given for poor performance.

Attendance: Students are expected to attend and be on time to ALL class meetings.  Students are responsible for all materials presented in class whether or not they are in attendance.

Studying: It is important to study at home on a regular basis; working problems is the best way to learn chemistry.  The instructor will give suggested homework problems during class time.  Take advantage of help sessions provided (office hours), but do not allow them to substitute for study time.  Finally, lectures will be clearer if you read the chapters before we cover them in class.

Academic  Dishonesty:  Cheating on any exam, quiz or lab report will be regarded as academic dishonesty and will be subject to penalties ranging from a zero on a given assignment to a final course grade of F depending on the seriousness of the incident.

Americans w/ Disabilities Act Compliance:  If any student feels that he/she has a disability and needs special accommodations, the instructor will work with that student and the Office of the Dean of Students  (326 North Shepler; 581-2209), to provide him/her a reasonable and fair opportunity to perform in this class.  Please advise the instructor of any such disability at the end of the first class period.

Weekly Tentative Lecture Schedule

January 13      Topic I:  Group Theory  (Handouts)

January 20      Periodic Trends

January 27      Compounds of Hydrogen/Hydrides

February 3      Compounds of Hydrogen/Hydrides
                       Exam #1:  February 7

February 17    Groups 1 Elements: The Alkali Metals

February 24    Groups 2 Elements:  The Alkaline Earth Metals

March 3          Group 13 Elements

March 10         Group 14 Elements
                        Exam #2:  March 14

March 17         SPRING BREAK

March 24         Group 15 Elements

March 31         Group 16 Elements

April 7              Group 17 Elements:  The Halogens

April 14            Group 18 Elements:  The Noble Gases
                        Exam #3:  April 18

April 21           Organometallic Chemistry (Handouts)

April 28           Organometallic Chemistry (Handouts)

May 5              Finals Week

                        Final Exam:  May 9, 1:00 – 3:00 pm

PROJECT:  Write two summaries of specific journal articles related to the field of inorganic chemistry.  It must follow the format shown in the example below.  One of the two outlines must be given orally.  Use overhead transparencies to present your talk.  Your talk will be scheduled the week of April 21st.  BE CREATIVE!!!

The project deadlines will not be changed.

In any field, journal articles are an excellent source of general, current knowledge as well as new research ideas.  Articles can be selected initially by scanning the journal’s table of contents for interesting titles.  It is usually not necessary to read the entire article, unless it is especially interesting.  Start by reading the abstract.  If the field is unfamiliar to you and you are interested, read the introduction where the authors should attempt to place their work in context.  Then read the conclusions.  If you need more details concerning how the work was done, read the rest of the paper.  Eventually, you should find several authors in your field whose work is especially interesting and whose papers you always read.

List of Journals from the field of Inorganic Chemistry
Inorganic Chem.
J. Chem. Soc. , Dalton Trans.
Coord. Chem. Rev.
Prog. Inorg. Chem.
J. Organomet. Chem.
New J. Chem.
Struc. And Bonding
Pure Appl. Chem.
J. Chem. Soc., Chem. Commun.
Inorg. Chim. Acta

Example of the project to be completed by week of April 21st is shown below.

John Doe
Inorganic Chemistry II
January 13, 2003

Breen, T.: Stephan, D.W. “Phosphinidene Transfer Reactions of the Terminal Phosphinidene Complex Cp2Zr(PC6H2-2,4,6-t-Bu3)(PMe3)”, J. Am. Chem. Soc., 1995, 117, 11914-11921.

Significance:  A number of phosphines are synthesized and used as ligands.  This paper discusses a different route in synthesizing different phosphine and phosphinidene compounds using an early transition metal.  Apparently, the low-valent transition metal phosphinidene complexes are electrophilic and thus are analogous to Fischer carbene complexes and the high valent transition metal phosphinidenes all contain nuceophylic phosphorus centers corresponding to Schrock-type carbenes.

Why I believe this paper is particularly important:  This paper discusses a convenient route to different phosphine and phosphinidene compounds that can be used as ligands.  The compounds that were synthesized by Stephan et al. were in relatively high yield.  As reported, studies of metal-phophorus double bonds have drawn less attention than early-metal imides, oxides, and sulfides.

Relevent Literature:  A paper to understand the stabililty of Zr-phosphinidene complexes that was very helpful:  Hou, Z.; Breen, T. L.; Stephan, D. W. “Formation and Reactivity of the Early Metal Phosphides and Phosphinidenes Cp*2Zr=Pr, Cp*2Zr(PR)2, and Cp*2Zr(PR)3”, Organometallics, 1993, 12, 3158.

Questions that I have after reading the paper:  What effect would having a methylene unit inserted between the phophorus and the phenyl group have on the stereochemistry of the product?  What effect would placing more electron withdrawing or donating groups on the alkyl or phenyl groups attached to the phosphorus have on the reactivity of the metal-phosphinidene complex?

What remains to be done:  To determine the limitations of this method in synthesizing various phosphorus containing compounds by using different Zr-phosphinidene complexes.  Varify the proposed mechanism that was reported.

The Zirconocene complex used in the reactions is shown below.