Wednesday, February 23, 2011

Chemical bonds in a class of their own

An important concept which has featured in previous posts is that of 4 electron, 3 orbital chemical bonding. It is relevant to hydrogen bonding and methine dyes.
Here is a scan of some of the relevant pages of the beautiful book, Valency and Bonding by Weinhold and Landis.

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Thermodynamics and emergence

Novelty.  Temperature and entropy are emergent properties. Classically, they are defined by the zeroth and second laws of thermodynamics, re...