Molecular Orbital Diagram For A Simple Pi Bond – Bonding And Antibonding

Molecular Orbital Diagram For A Simple Pi Bond – Bonding And Antibonding

February 14, 2017

In the previous post in this series, “On Conjugation and Resonance“, I warned that in order to gain a deeper understanding of some of the concepts ahead, we’re going to need to go into MO theory. Bu…

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Optical Rotation, Optical Activity, and Specific Rotation

February 7, 2017

As the title suggests, today’s post is all about optical rotation, optical activity, and specific rotation. This post was co-authored with Matt Pierce of Organic Chemistry Solutions.  Ask Matt about scheduling…

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Assigning R/S To Newman Projections (And Converting Newman To Line Diagrams)

Assigning R/S To Newman Projections (And Converting Newman To Line Diagrams)

February 1, 2017

This post was co-authored with Matt Pierce of Organic Chemistry Solutions.  Ask Matt about scheduling an online tutoring session here. In two recent posts we discussed how to assign (R/S) to configurations of chir…

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Conjugation and Resonance

Conjugation and Resonance

January 24, 2017

On Conjugation And Resonance This is the first in a series of posts that will eventually cover conjugation, pi systems, molecular orbital theory, dienes, 1,2- and 1,4- additions, the Diels Alder reaction and other per…

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Introduction To Aromaticity

Introduction To Aromaticity

January 20, 2017

The Highly Anomalous Behavior of “Cyclohexatriene” Scene: a plane full of passengers are flying over the Atlantic ocean. Halfway through the flight, there’s suddenly a loud THUNK from outside t…

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Determining R/S (2) – The Method of Dots

Determining R/S (2) – The Method of Dots

January 17, 2017

This post was co-authored with Matt Pierce of Organic Chemistry Solutions.  Ask Matt about scheduling an online tutoring session here. In our first post on the Cahn-Ingold-Prelog (CIP) Rules, we gave a broad overv…

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IR Spectroscopy: Some Simple Practice Problems

November 29, 2016

By itself, Infrared (IR) spectroscopy isn’t a great technique for solving the structure of an unknown molecule. However, we’ve seen that IR spectroscopy can a great technique for identifying certain functi…

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Infrared Spectroscopy: A Quick Primer On Interpreting Spectra

Infrared Spectroscopy: A Quick Primer On Interpreting Spectra

November 23, 2016

How To Interpret IR Spectra In 1 Minute Or Less: The 2 Most Important Things To Look For [Tongue and Sword] Last post, we briefly introduced the concept of bond vibrations, and we saw that we can think of covalent b…

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Organic Chemistry and the New MCAT

Organic Chemistry and the New MCAT

November 16, 2016

Organic Chemistry and the MCAT, by Leah Fisch Note from James: This is a guest post by Leah Fisch of Leah4Sci.com , an online resource for learning organic chemistry, MCAT preparation, and other science topics . Th…

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Bond Vibrations, IR Spectroscopy, and the “Ball and Spring” Model

Bond Vibrations, IR Spectroscopy, and the “Ball and Spring” Model

November 11, 2016

In This Post  Why do UV spectra have such broad peaks? The “stadium” analogy. Introduction to vibrational energy levels. Visualizing different vibrational energy levels A useful analogy: the “ball a…

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