Geometric IsomerismOpt

Geometric IsomerismOpt - • Cis but-2-ene Cis...

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Chemical Ideas 3.5 Geometric Isomerism (different geometries) 100’s of free ppt’s from www.pptpoint.com library
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Types of isomerism Isomerism Structural  isomerism Stereoisomerism Geometric  isomerism Optical  isomerism
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Build these models Cis but-2-ene trans but-2-ene
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Two isomers are not interchangeable. Carbon 2 & 3 joined by double bond. No free rotation. Bonds would have to be broken and reformed. +270 kJ mol -1 energy needed to break this bond. Insufficient energy available at room temperature.
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cis. .. Different names needed to identify isomers. Substituent groups on the same side of double bond.
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Unformatted text preview: • Cis but-2-ene Cis but-2-ene ...and trans . • “ trans ” means other side or cross over e.g. trans Atlantic, transplant, trans…. .! • Substituents on opposite sides of double bond. trans but-2-ene Different compounds- different properties. Time to think and apply what we have learned! • How are the structures of nerol and geraniol related? • How many moles of H 2 would be needed to saturate one mole of geraniol? • How are nerol and geraniol related to citronellol? • How are the structures of nerol and geraniol related to linalool?...
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Geometric IsomerismOpt - • Cis but-2-ene Cis...

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