Chapter 12 - CHEMISTRY The Molecular Science Chapter twelve...

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CHEMISTRY The Molecular Science Chapter twelve Fuels, Organic Chemicals and Polymers
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Chiral Molecules An object that cannot be superimposed on its mirror image. A tetrahedral carbon with 4 different groups. A chiral molecule and its mirror image are called enantiomers. enantiomers
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Achiral Molecules When a molecule and its mirror image are superimposable. Molecules with a plane of symmetry. CH 3 H 3 C OH H CH 3 H 3 C OH H
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Chiral Molecules Enantiomers are stereoisomers – same molecular formula, same connectivity, different arrangement in Space. Nature has a preference for one type of enantiomer. Most amino acids are left handed (L). Enzymes, taste buds, our noses are chiral – have a different response to different enantiomers
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Practice Problem 12.4 p. 561 Aspartame, a widely used sugar substitute, is a chiral molecule with the structural formula O O H N NH 2 HO O O aspartame Identify the chiral carbon atoms. Maximum of 2 n stereoisomers, n =
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Functional groups A group of atoms which determines the dominating physical or chemical properties in a molecule. Alkanes, Alkenes, Alkynes R – Halogens: F –, Cl –, Br –, I– X– Alcohols: HO – Carboxylic acids: – COOH (organic weak acids) Amines: – NH 2 (organic weak bases)
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Chapter 12 - CHEMISTRY The Molecular Science Chapter twelve...

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