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A methyl radical source has been developed for use in high vacuum. Methyl radicals are produced through azomethane pyrolysis in a tubular reactor located inside an ultrahigh vacuum chamber. Other gas products include nitrogen from azomethane pyrolysis, and methane, ethane plus hydrogen from the reactions of methyl radicals on the walls of the reactor. Methyl yields as high as 42% have been observed.

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Matrix diagonalization, the key technique at the heart of modern computational chemistry for the numerical solution of the Schrödinger equation, can be easily introduced in the physical chemistry curriculum in a pedagogical context using simple Hückel molecular orbital theory for π bonding in molecules. We present details and results of computations, including both the quintessential examples of polycyclic aromatic hydrocarbons discussed in text books and an interesting extension to a large molecule, C60 (buckminsterfullerene), the first member of the fullerenes to be discovered and synthesized, using a simple Excel spreadsheet-based VBA “application” that we have developed.