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Unformatted text preview: LMZ/CHEM109A/ Winter 2010 Chapters 6: Reactions of alkynes I. . Nomenclature of Alkyne: (CnH2n-2) (Sec. 6.1-6.2) 1. Find the longest chain containing the triple bond or multiple bonds 2. Number the carbon atoms in the chain, beginning at the end nearer the triple bond 3. If the triple bond is equidistance from the two ends, begin at the end nearer the first branch point CH 3 CH 2 CH 3 C CH CH 3 C e.g. 5 4. Write the full name, numbering the substituents according to their position in the chain end listing them alphabetically 5. If more than one triple bond is present, indicate the position of each and use the suffixes: diyne, triyne, tetrayne and so on. 6. When both double and triple bonds are present, i.e. enyne , number the chain from the end nearer the first multiple bond, whether double or triple C C H C CH H 3 C H 3 C e.g. 6 7. When there is a choice in numbering, double bond receives a low number....
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