Chem241a_Lecture_15

Chem241a_Lecture_15 - Organic Chemistry 241a Prof. Bogdan...

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Or ganic Chemistry 241a Prof. Bogdan Olenyuk Contact Information Office: Old Chemistry 309 olenyuk@email.arizona.edu Phone: (520) 626-0754 Course web site: http://www.chem.arizona.edu/courseweb/074/CHEM241A1_2/FrameSet.html
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Chapter 6: Alkenes • Structure of alkenes • Naming of alkenes • Cis-trans isomerism • Stability of alkenes Today we will cover: Reading Assignment: McMurry (the BOOK), Ch. 6.1-6.6
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Calculating Degree of Unsaturation Relates molecular formula to possible structures Degree of unsaturation : number of multiple bonds or rings Formula for a saturated acyclic compound is C n H 2n+2 Each ring or multiple bond replaces 2 H's
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Example: C 6 H 10 • Saturated is C 6 H 14 – Therefore 4 H's are not present • This has two degrees of unsaturation – Two double bonds? – or triple bond? – or two rings – or ring and double bond
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Degree of Unsaturation With Other Elements • Organohalogens (X: F, Cl, Br, I) • Halogen replaces hydrogen •C 4 H 6 Br 2 and C 4 H 8 have one degree of unsaturation • Organoxygen compounds (C,H,O) - if connected by single bonds • These don't affect the total count of H's
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Chem241a_Lecture_15 - Organic Chemistry 241a Prof. Bogdan...

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