molecular orbitals

Frost Circles

Frost Circles

May 17, 2017

We’ve spent a lot of time in previous posts “building up” and drawing out the molecular orbitals for various species. In this post we’ll learn an extremely useful shortcut that will help us dra…

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The Pi Molecular Orbitals of Cyclobutadiene

The Pi Molecular Orbitals of Cyclobutadiene

May 10, 2017

Previously, we’ve seen what the molecular orbitals of benzene look like, and that the fact that they are partially duplexed (or to use the proper nomenclature, “degenerate“) helps to explain benzene…

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Pi Molecular Orbitals of Butadiene

February 28, 2017

In the last post in this series we built up the pi molecular orbitals of the allyl pi-system, consisting of three consecutive p orbitals in conjugation. We saw that: The number of molecular orbitals (n) for a pi-syst…

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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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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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