Give the IUPAC name for the following structure: 3-chloro-6-methylcyclohexanol 2

Question

Give the IUPAC name for the following structure: 3-chloro-6-methylcyclohexanol 2-methyl-5-chlorocyclohexanol 1 -chloro-4-methylcyclohexanol 5-chloro-2-methylcyclohexanol 2-methyl-3-chlorocyclohexanol Identify the pair of compounds. identical conformation isomers constitutional isomers configurational isomers none of the above If a pure R isomer has a specific rotation of -110.0 degree, and a sample contains 80.0% of the R isomer and 20.0% of its enantiomer, what is the observed specific rotation of the mixture?

Explanation / Answer

11)

according to IUPAC,

word root = indicates no of carbons in longest chain (6) = hex

primary suffix = indicates sturated/unsaturated = ane

secondary suffix = indicates functional group = ol

primary prefix = indicates cyclic compounds = cyclo

secondary prefix = indicates substituent = 5-chloro-2-methyl

so that , name of the molecule (S.Preffix)(P.preffix)(WordRoot)(P.suffix)(S.suffix)

name: 5-chloro-2-methylcyclohexanol

12) both are E,Z-isomers .

so that ,

they are constitutional isomers

answer: C

13) observed specificrotation =

optical purity = R-s/R+s *100

                 = 80-20/100*100

                 = 60%

   optical purity = observed specificrotation / pure enantiomer rotation *100

    60 = x/-110*100

x = observed specificrotation of mixer = -66 degrees

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