Question

8. What is the IUPAC name for the following compound? A) 2,3-Dimethyl-4-sec-butylheptane B) 4-sec-Butyl-2,3-dimethylheptane C) 3,5,6-Trimethyl-4-propylheptane D) 2,3,5-Trimethyl-4-propylheptane 9. Rank the conformers of butane in order of decreasing stability, putting the most stable first. CH3 Онс сн сн, H CH CH н, сH, н" CH3 Н. H FH H H н H H H н H H IV C) II> III> I> IV D) I>IV> II>II A) IV>I>II> III B) IV>1>1II> II 10. Which of the following chair conformations represents trans-1,3-dimethylcyclohexane? II IV A) I B) II C) III D) IV 11. Which of the following chair conformations represents trans-1,4-dimethylcyclohexane? IV A) I B) II C) II D) IV

Answer 1

Aus Rules for TURAC Nomenclature # Carbon Parent chain should coutanie Marimum number of carbon atoms. # Numbering is done in such a way that mapor functional group get the least number. # and other substituents also got the least number while numbering prefoc are used for the lower functional group and suffix are used for the most priority functional group

TUPAC name: 213,5- Trimethyl-4-propyl heptane Hence, option D) is correct
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