Monday, July 13, 2020

Newman projection formulae & their significance. REPRESENTATION OF 3D STRUCTURES; Stereochemistry class II ONLINE CLASS

Newman projection formulae & their significance. REPRESENTATION OF 3D STRUCTURES Stereochemistry class II



An online class voice over by Dr. Rojisha V. C. and student Dr. Rahul Soman for GPAT preparing persons, based on GPAT Syllabus.  In this class Dr. Rojisha V. C. explains


 - Representation of 3D structures of Organic compounds

1. Flying Wedge Formula

2. Fischer Projection

3. Newman Projection

4. Sawhorse projection Formula



Three dimensional structure of Methane, Ethane and asymmetric  carbon center

WEDGE representation



GPAT / Organic chemistry / Stereochemistry

English ONLINE CLASS








Malayalam ONLINE CLASS








GPAT Syllabus/ Organic chemistry / Stereochemistry

11. Stereochemistry

Stereochemistry. Chirality & asymmetry [introduction of the same to S, P, & N]. Definition & classification [different types of isomerisms]. Enantiomers, diastereomers. Enantiomerism & diastereomerism. Meso compounds & their optical activity. Stereochemistry in acyclic compounds. Newman projection formulae & their significance. Conformational analysis of nbutane. Absolute & relative configuration. Assigning R & S configuration based on Cahn Ingold & Prelog system. Racemic mixture- its definition & resolution. Definitions of terms stereoselective, stereospecific, Enantiomeric excess & diastereomeric excess. Stereochemistry in cyclic systems. Conformations of cyclohexane. Cis-trans relationship in cyclohexane. Prediction of stability of different conformations of 1, 2- 1,3- & 1,4- disubstituted cyclohexanes. Effect of multiple substitutions on the stability of cyclohexane conformations. Chair conformations of cis-, & trans-decalins, perhydrophenanthrenes, & a tetracyclic steroidal nucleus. An introduction to atropisomerism.

 

Lecture 1: Stereochemistry : Definition & classification [different types of isomerisms].

Lecture 2: Stereochemistry: Stereochemistry in acyclic compounds.  Newman projection formulae & their significance.

Lecture 3: Stereochemistry: Chirality & asymmetry [introduction of the same to S, P, & N]. Enantiomers, diastereomers. Enantiomerism & diastereomerism. Meso compounds & their optical activity.

Lecture 4: Stereochemistry:  relative configuration & Stereochemistry in cyclic systems.

Lecture 5: Stereochemistry: Assigning R & S configuration based on Cahn Ingold & Prelog system.

Lecture 6: Stereochemistry: Conformational analysis of nbutane. Absolute

Lecture 7: Stereochemistry: Conformations of cyclohexane. Cis-trans relationship in cyclohexane. Prediction of stability of different conformations of 1, 2- 1,3- & 1,4- disubstituted cyclohexanes. Effect of multiple substitutions on the stability of cyclohexane conformations.

 

 

 

 

 


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