Questions/Stereochemistry/How do you assign pr...
Configuration & NomenclatureStereochemistry

How do you assign priority between CH(CH3)2-CH(CH_3)_2 andCH=CH2-CH=CH_2using CIP rules?

Expert Answer

CH=CH2-CH=CH_2 has higher priority. Phantom atoms count double bonds as bonded twice to C. The alkene counts as (C, C, H), while isopropyl counts as (C, C, H). The phantom carbon gives priority.

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