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Identifying Isomers in Drawings with HONC 1234 Rule

Learn to distinguish isomers from drawings using the HONC 1234 rule and structural formulas. Discover how changing bond arrangements impacts molecular isomerism. Discuss if molecules with different drawings may have similar scents.

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Identifying Isomers in Drawings with HONC 1234 Rule

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  1. Discussion How can you tell whether a drawing represents a new isomer? • How does the HONC 1234 rule limit the number of possible structural formulas?

  2. Notes • If bonds must be broken to change the arrangement of atoms, then the two drawings are isomers. • If simply changing the orientation of the drawing or rotating a bond can produce the two drawings, then they are the same molecule

  3. Check-In • Will any of the molecules below have the same smell? Explain your thinking.

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