Question

Question 4 1 pts What is the IUPAC name for the following compound? OH O (25,3E)-2-hydroxy-3,4-dimethylhex-3-enal 2-hydroxy-3,4-dimethylhexan-1-al O (2R,3E)-2-hydroxy-3,4-dimethylhexan-1-al (2R, 3E)-2-hydroxy-3,4-dimethylhex-3-en-1-al O2-hydroxy-3,4-dimethylhexanal O (25,3Z)-2-hydroxy-3,4-dimethylhex-3-enal O (2R,3E)-2-hydroxy-3,4-dimethylhex-3-enal O (2R,3Z)-2-hydroxy-3,4-dimethylhex-3-enal

Answer 1

ОН Some basic rule for IUPAC Nomenclature: 1. Find longest chain and numbering start from this side in which group get less number, 2. Identify the group which is attached to the chain 3. Identify extra approach like (R/S, cis/Ara ans, E12, 2x etc) © Numbering of above molewle: OH Here longest chain containing 6- carbon according to IUPAC mule [6-carbon="tex? ] Identify the group: The molecule containing - OH, HY - CH3 ,-=- According to IUPAC rule - OH = Hydroxy] IHY = al. - CH3 = Methyl [ -=- = en Extra features: CRIS, us/trans, F/2, etc) Here &-carbon is a chinal canh so, Here have Ris nomenclatune

H oH 이 Y V y To For RIS - Nomenclature 4th group must be Situated in broken line. prion groups naen of different four H ,y clockwise notation Fixed 3-carbon VOTONTOH priority, onder mubering according to CIP puie.

Then 3-carbon becomes fixed and another three groups rotate clockwise OoH +0- 32 Trinita Ho 37 Clockwise = R' = 'PR' * sito- For ated double bona 2-methyl group in opposite direction so it is = E = BE Hence according to above discusion the IUPAC name of the molecule is - (2R, 3 E)-2-hydroxy-3,4-dimethyl - hex-3-en-1-al so option 4 is conect.