Alkanes and conformations

Alkanes and conformations - Alkanes conformations and...

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1 Alkanes, conformations, and strain Names of the straight chain hydrocarbons •M e t h a n e •E t h a n e Propane Butane •P e n t a n e •H e x a n e e p t a n e •O c t a n e •N o n a n e •D e c a n e •U n d e c a n e o d e c a n e C n H 2n+2 More about naming alkanes to come Cycloalkanes are C n H 2n C CC C C C H H H H H H H H H H H H or H 3 CCH 2 CH 2 CH 3 normal (n-butane) ends in methyl (CH 3 ) groups all CH 2 groups
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2 Nomenclature Rules for Alkanes 1. Find the longest continuous carbon chain; this designates the parent compound 2. The position of substituents are designated by numbers; the parent alkane is numbered from one of its two ends 3. The numbering starts from the end that gives the substituent the lowest number. If two or more substituents are present, the numbering of the parent alkane starts from the end the gives the lowest number. If these are equal, use a second branch point Nomenclature Rules for Alkanes (cont.) 4. The choice among parent chains of equal length is in favor of the most highly substituted one. 5. If the same substituent occurs two or more times in a molecule, the prefix di, tri, tetra… is used 6. If two different substituents are attached to the
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Alkanes and conformations - Alkanes conformations and...

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