Deciding Carbon Numbering for (Z)-1-bromo-2-chloro-2-fluoro-1-iodoethene

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SUMMARY

The discussion centers on determining the carbon numbering for (Z)-1-bromo-2-chloro-2-fluoro-1-iodoethene. The carbon attached to the highest priority substituent, based on atomic number, is assigned the lowest number. In this case, iodide, having the highest atomic number, dictates that the rightmost carbon is designated as carbon 1, while the other carbon is numbered 2.

PREREQUISITES
  • Understanding of IUPAC nomenclature for organic compounds
  • Knowledge of atomic numbers and their significance in substituent priority
  • Familiarity with stereochemistry, particularly Z and E configurations
  • Basic concepts of organic chemistry structures and bonding
NEXT STEPS
  • Study IUPAC rules for naming organic compounds in detail
  • Learn about the Cahn-Ingold-Prelog priority rules for stereochemistry
  • Explore examples of carbon numbering in complex organic molecules
  • Investigate the implications of substituent priority on molecular reactivity
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Chemistry students, organic chemists, and anyone involved in the study or application of organic compound nomenclature and stereochemistry.

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Homework Statement
Name the following structure.
Relevant Equations
none
1612538036611.png

The following structure was given, and the answer was (z)-1-bromo-2-chloro-2-fluoro-1-iodoethene.
But how do you decide which carbon is numbered 1 and the other 2?

Thank you.
 
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You take the carbon which is attached to the highest priority substituent. The highest priority substituent is the substituent with the highest atomic number. Since iodide has a greater atomic number than any of them, the rightmost carbon gets priority.
 

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