43 - Last reminders Final exam time scheduled by university...

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Last reminders: Final exam time scheduled by university: CH101-003 (MWF 11:20 – 12:10) Friday, December 14, 8-11 AM DAB222 Per regulation, the only reason for an exam time change is three exams in 24 hours. CH101-004 (MWF 12:25 – 1:15) Monday, December 10, 1-4 PM DAB222 CH101-004 students who miss Monday’s final will be given a score of zero. Independently deciding to take the exam on Friday is NOT an option. Isomers Different molecules with the same molecular formula. Constitutional Isomers Different connectivities Stereoisomers Same connectivities, different spatial arrangement geometric isomers cis/trans enantiomer mirror images nonsuperimposable Section 13.3 Constitutional Isomers Condensed formulas are different CH 3 -CH=CH-CH 3 CH 3 -CH(CH 3 )-CH 3 CH 3 -CH 2 -CH 2 -CH 3 C 4 H 10 C 4 H 8 H H H H trans- cis- Geometric Stereoisomers Condensed formulas are the same (same connectivity) but spatially different. Section 13.3 7 6 5 4 a b 3 2 1 8 a 9 10 c dec 2- ene 8-methyl-4-propyl- trans- 7 6 5 4 a b 3 2 8 a 9 10 c 1 dec 2- ene 8-methyl-4-propyl- cis- Section 13.3 Opposite sides of double bond H H H H Same side of double bond Geometric Stereoisomers Name the following: hexene 2- 5-methyl- trans - heptene 3- 5-methyl- cis - Section 13.3 Geometric Stereoisomers chiral - Greek: cheir - hand
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