conjugation

The Diels-Alder Reaction

The Diels-Alder Reaction

August 30, 2017

Today we’ll introduce  a reaction I consider to be the most useful and powerful reaction in all of organic chemistry: the Diels-Alder reaction. But don’t take some random blogger’s word for it. Her…

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Molecular Orbitals of The Allyl Cation, Allyl Radical, and Allyl Anion

Molecular Orbitals of The Allyl Cation, Allyl Radical, and Allyl Anion

February 16, 2017

In the last post, we showed how to build a molecular orbital (MO) diagram for a typical C-C pi bond. We saw that: The number of molecular orbitals equalled the number of contributing atomic orbitals. The overlap of …

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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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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 UV-Vis Spectroscopy

September 16, 2016

In today’s post we’ll discuss why most molecules are colourless, introduce the useful technique of UV-visible spectroscopy, and finally explain why molecules like chlorophyll and β-carotene are coloured.…

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Are these molecules conjugated?

Are these molecules conjugated?

March 8, 2011

If Org 2 has an overall theme, it’s “resonance”. Today’s post has a very simple message. Atoms with lone pairs, π bonds, radicals, and carbocations can participate in resonance: atoms that la…

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What To Expect In Organic Chemistry 2

What To Expect In Organic Chemistry 2

January 19, 2011

A large part of organic chemistry 1 is devoted to laying the foundations: introducing structural concepts such as bonding, geometry, stereochemistry, conformations, resonance, and steric effects, while introducing con…

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