CH 221 1st Edition Lecture 30Outline of Last Lecture I. EpoxidesII. AminesIII. ThiolsOutline of Current Lecture IV. ChloronationV. BromonationVI. Reactivity-Selectivity PrincipleVII. Mass SpectrophotometryCurrent LectureIV. Three steps of Chloronation- Initiation step- Propagation step- Termination step- Radical chain reaction- Use excess alkane to get monochloronation- Forms a dihalogenated compoundV. Bromonation has the same mechanism of chloronation- Relative stabilities of alkyl radicalsMost stable tertiary > secondary > primary > methyl least stable- Easier to make a secondary radical than a primary radical- Halogenation converts an alkane to a useful compoundVI. Reactivity-selectivity principle- Bromine radical is more selective than chlorine radical- Because chloronation is relatively nonselective, it is only useful when all hydrogens are the sameThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- The stereochemistry of a radical substitution reaction is a pair of enantiomers in a racemic mixtureVII. Mass Spectrophotometry- Molecule electron beam molecular ion + electron- An electron is ejected from the compound thereby forming a molecular ion- Only the positively charged species reach the recorder- Mass spectrum: m/z mass to charge
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