Which of the following structures represents the most stable conformation of cis-1-ethyl-2-methylcyclohexane? Select one: Оа. Me Et Ob. Me. Et d. Me Et Which of the following structures would be the most stable carbocation? Select one: O a. O b. О с. Od.

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ぐ=m, Part 4: Cycloalkanes and Stereochemistry. assignment. Br Br Br ...|H ...H ... H ..iBr H. Br Br .... ICH3 H. 18. For rings that an the and label each atom as R or S. Some rings will not have an R or S

D. HOw many aistinct terminal alIKynes exist with a molecular formuia of C5H8! c. How many distinct internal alkynes exist with a molecular formula of C6H10? 4. Which of the following has the lowest b.p? a. 3,3-dimethyl-1-butyne; b. 1-hexyne с. 2-heptyne; d. 3-hexyne; e. 1-decyne. 1 5. Will the reactions shown below go the direction as indicated? + CHOMaBr CH

Which conformation(s) show(s) the bromines in a gauche orientation for 2,3-dibromobutane, viewed through the C-2– C-3 bond? CH3 Br H H3C. Br H3C H3C Br Br Br Br H. ČH3 CH3 H I II III ** Br Br H3C, H. Br H3C H. H3C Br ČH3 IV V

10.) (Name the following alkanes (IUPAC names). а.) Н-с —н H H H H Н-с -ҫ-с-с-с-ҫ-н H H H H H b.) I-C- CIH