bonding

How Do We Know Methane Is Tetrahedral?

How Do We Know Methane Is Tetrahedral?

August 25, 2017

In our review of atomic orbitals, we saw that the orbital configuration of the valence electrons of carbon is 2s22p2 as shown below:  Since the 2s orbital is lower in energy than 2p, it’s filled first. That mea…

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The Marriage May Be Bad, But the Divorce Still Costs Money

The Marriage May Be Bad, But the Divorce Still Costs Money

October 28, 2010

Common misconception: energy is released through the breaking of bonds. Not correct. Energy is released through the FORMATION of chemical bonds.  Formation of a new bond between two atoms results in a net lowering of…

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Sigma bonds come in six varieties: Pi bonds come in one

Sigma bonds come in six varieties: Pi bonds come in one

October 13, 2010

You may recall from Gen chem (and no doubt your first week of o-chem as well), that orbitals on carbon come in two flavors: s and p. s orbitals should be familiar as the spherical-shaped orbitals. The electrons of hy…

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From Gen Chem to Org Chem, Pt. 7 – Lewis Structures

From Gen Chem to Org Chem, Pt. 7 – Lewis Structures

August 14, 2010

There are essentially three uses for Lewis structures. They’re good at helping you get acquainted with the placement of electrons around atoms, helping to visualize molecular geometry, and finally to remember th…

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From Gen Chem to Organic Chem, Pt. 4 – Chemical Bonding

From Gen Chem to Organic Chem, Pt. 4 – Chemical Bonding

July 27, 2010

Last time in this series we talked about the Coulomb equation and how important it is for understanding the electrostatic interaction between the electron and the nucleus. Let’s ask the next question.  What hap…

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Gen Chem and Organic Chem: How are they different?

June 28, 2010

After finishing my freshman year of college, I spent my summer in the university town where I went to school. I had a menial telemarketing job along with some volunteer lab work on the side. Life was pretty easy: many…

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Exam Tip: Don’t just bring your model kit – USE it!

Exam Tip: Don’t just bring your model kit – USE it!

June 23, 2010

Here’s something I don’t understand. Well, that’s not true – it’s something I understand, but I think is… unwise. Bringing a model kit to an exam and never using it. There is nothin…

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Summary Sheet – Introduction to Reactivity and Nomenclature

Summary Sheet – Introduction to Reactivity and Nomenclature

May 12, 2010

One of my students is taking an introductory organic chemistry course at a community college. While preparing for our next session, which is going to cover some of the basics of chemical reactivity, I found myself mak…

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