Course review : CH223

Structure and Stereochemistry

~ by Dibyojeet Bagchi

Disclaimer: The content of this page are opinions expressed by individual students. The information provided is for guidance purposes. Use the information at your own risk.

Credits

6

During which semester & year you took the course ?

Autumn 2019

Course Instructor

Prof. Volla

What grade was awarded to you?

AA

Course Difficulty (On a scale of 1 to 5)

4

Comment on the grading done by the professor in your opinion?

I feel it was rather moderate and professor was quite considerate

What was the Attendance Policy?

Manual attendance is taken , Didnt awarded any DX but expects good attendance of batch

Pre-Requisites?

None

This Course evaluation comprises of?

Quizzes(2), Mid-Sem, End-Sem

Quiz 1 15%

Midsem 30%

Quiz 2 20%

Endsem 35%

What are the topics covered in the course?

MOT
Frontier Molecular Orbitals
Introduction to HOMO and LUMO
Introduction to pericyclic reactions.
Regioselectivity and stereoselectivity in Diels Alder Reactions
Electrocyclic reactions
Sigmatropic rearrangement
Introduction to Stereochemistry (R/S naming)
Concept of chirality:center, axis and plane of chirality.
Optical purity and enantio. excess
Pro Chirality and prochiral faces

UV spectroscopy and beer’s Lambert law
Woodward Fisher rules

IR spectra:molecular vibrations and Hooke’s law, IR active and IR inactive vibrations, characteristic IR absorptions of important functional groups.

NMR : brief introduction to theory behind NMR, magnetic shielding by electrons, measurement of 1H and 13C chemical shifts, characteristic values of chemical shifts for various functional groups,theory of spin-spin coupling, C13 spectra and proton-decoupling.

Mass Spectra

How were the Lectures for this course?

The course content is really cool and I have enjoyed learning it. It may be a little disappointing for those who are expecting lot of organic reactions or a lot of curly arrow mechanism in this course but trust me the course content is much more interesting and fundamental, which will help you later in understanding reaction, mechanisms and products. It’s much different from a conventional organic chemistry course (almost free from reaction, reagent and product ).
Most of the things are fairly easy to understand as long as you are paying attention to the content , the lecture and the prof. is really useful and interesting so dont miss them.

How were the Exams for this course?

In general in all quizzes,midsem and endsem 75% of questions will directly or indirectly linked to your notes or things which have been discussed in class. And for rest 25% you have to put a little effort. Ofcourse these questions are not out of syllabus, but require a little critical thinking and application of basic concepts which you have done in class to get the right answer. If you get those right you can easily score more than class average. Quizzes will be very easy as compared to endsem so prepare well for it. Regarding the paper pattern I can say it matches quite well with previous year ones (questions dont repeat but type of questions may ) so do give them a try before going for the real exam.

How are the Assignments & Projects for this course?

No Assignments and Projects were given for the course.

Any tips for the junta to perform well in the course?

For first part Molecular Orbital Theory I would say brushing up with CH 105 slides would be a good idea or one can read book by Clayden because MOT is something which will come again and again. Similarly Pericyclic reactions are not that difficult they just need proper understanding of MOT and symmetry. Stereochemistry is not that difficult, most of us are already aware of it but dont take it too light as you will also learn new types of chirality here. Pro chirality needs some understanding so read it from the references which will be uploaded on moodle and do practice a lot on these topics. Midsem is mostly of Stereochemistry problems so ample practice can ensure no silly mistakes.
Post midsem stuff is mostly spectroscopy which is something to understand and well as remember( various numbers related to different different functional groups) but again it’s not that difficult just make of chart of all important numbers and stick it near your study table (it helps a lot in memorizing) . Apart from remembering numbers spectroscopy involves hell lot of concepts so reading from either wade(basic) or pavia (adv.) Is recommended apart from learning your notes. Wade book has lot if illustrations and problems as well so its always better to solve them, because spectroscopy is like trigonometry it needs practice. Major chunk in quiz 2 and endsem will be from spectroscopy so you cant ignore it.
Apart from that prof. Volla is very enthusiastic and always keen to help students in learning so never mind asking him for help if you ever face any difficulty.

References used in this course:

Most of the material required for this course will be uploaded by sir on moodle from time to time and they mostly contain texts from the following books. Apart from that if are interested you can go through the relevant chapters from these books.

L. G. Wade Jr. “Organic Chemistry”. 7th Ed., Prentice Hall, 2009 ( For spectroscopy)

T. W. G. Solomons, C.G. Fryhle. “Organic Chemistry”, 9th Ed., Wiley-India, 2008.

J. Clayden, N. Greeves, S. Warren and P. Wothers, “Organic Chemistry”, 1st Ed., Oxford University Press, 2001.

INTRODUCTION TO SPECTROSCOPY, 5e, by Donald L. Pavia

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