lecture 16.1

lecture 16.1 - 16-16-1Organic Organic...

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Unformatted text preview: 16-16-1Organic Organic ChemistryChemistryWilliam H. BrownWilliam H. BrownChristopher S. FooteChristopher S. FooteBrent L. IversonBrent L. Iverson16-16-2Aldehydes Aldehydes & & KetonesKetonesChapter 16Chapter 1616-16-3The Carbonyl GroupThe Carbonyl GroupIn this and several following chapters, we study the physical and chemical properties of classes of compounds containing the carbonyl group, C=Oaldehydes and ketones (Chapter 16)carboxylic acids (Chapter 17)acid halides, acid anhydrides, esters, amides (Chapter 18)enolate anions (Chapter 19)16-16-4The Carbonyl GroupThe Carbonyl Groupthe carbonyl group consists of one sigma bond formed by the overlap of sp2hybrid orbitals and one pi bond formed by the overlap of parallel 2porbitalspi bonding and pi antibonding MOs for formaldehyde16-16-5StructureStructurethe functional group of an aldehyde is a carbonyl group bonded to a H atom and a carbon atom the functional group of a ketone is a carbonyl group bonded to two carbon atomsPropanone(Acetone)Ethanal(Acetaldehyde)Methanal(Formaldehyde)OOOCH3CHHCHCH3CCH316-16-6NomenclatureNomenclatureIUPAC names:the parent chain is the longest chain that contains the functional groupfor an aldehyde, change the suffix from -e-eto -al-alfor an unsaturated aldehyde, change the infix from -an--an-to -en--en-; the location of the suffix determines the numbering patternfor a cyclic molecule in which -CHO is bonded to the ring, add the suffix -carbaldehydecarbaldehyde16-16-7Nomenclature: AldehydesNomenclature: Aldehydesthe IUPAC retains the common names benzaldehyde and cinnamaldehyde, as well formaldehyde and acetaldehydeHO3-Methylbutanal2-Propenal(Acrolein)(2E)-3,7-Dimethyl-2,6-octadienal(Geranial)12345678HOHOCHOHOCHOCyclopentane-carbaldehydetrans-4-Hydroxycyclo-hexanecarbaldehyde14 CHOC6H5CHOtrans-3-Phenyl-2-propenal(Cinnamaldehyde)Benzaldehyde16-...
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This note was uploaded on 03/30/2008 for the course CHEM 262 taught by Professor Forbes during the Spring '08 term at UNC.

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lecture 16.1 - 16-16-1Organic Organic...

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