CHM136H1 Lecture Notes - Lecture 9: Ethyl Group, Decane, Propyl Group
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CHM136H1 Full Course Notes
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Draw parent chain and number its carbon atoms. Alkyl groups have yl ending rather than ane Drawn below, the parent chain is in red. Four methyl groups - 1 at carbon 2 and 8, 2 at carbon 4. Methyl group on carbon 2 of the butyl group. Compounds with same molecular formula but diff connectivity (order of attachment) to atoms. Each would have different physical and chemical properties, but similar if many combos. A molecule like c31h64 would have 1. 066 x 1010 constitutional isomers. 2-methylbutane ; 2,2-methylpropane - these are branched molecules. Classification of c & h in alkanes and alkyl groups. Primary (1 ) c: carbon bonded to one other carbon. 1 h: hydrogen bonded to 1 carbon. Secondary (2 ) c: carbon bonded to two other carbons. 2 h: hydrogen bonded to 2 carbon. Tertiary (3 ) c: carbon bonded to three other carbons. 3 h: hydrogen bonded to 3 carbon.
