Which one of these depictions of alkenes is not acceptable as it is an impossible geometry and/or it is impossible to determine the configuration (e.g. E vs. Z) of the alkene? Select all that apply. CH3 H H CH3 CH3 H H X X I b H₂C H₂C H CH3 CH3 1 2 3 4

4 Listen ▶ Provide the correct IUPAC name for this molecule H₂C HỌC CHỊCH H₂C- CH₂ CH₂ P

Write the IUPAC name for the compound below. Be sure to use correct punctuation. Keep the information page open for guidance and for use with feedback. Accepted names for branched alkyl groups are isopropyl, isobutyl, sec-butyl, and tert-butyl. Do not use italics. CH2CH3 CH;CH2CHCH,ĊHCH3 ČH2CH3 The IUPAC name is

5. a-G a- Convert the following Newman projection into the bond line structural formula. Must use stereobonds to indicate the orientation of the groups. H3CO CN b- Draw the anti, gauche, and eclipsed conformations of the following molecule using Newman projection. H H H H c- i. Which cyclopropane molecule has the highest torsional strain? ii. Which cyclopropane molecule has the lowest torsional strain? C b a

4 Practice 2 3-9 4.8 Conformational Analysis of Butane The graph below represents the relative energies of the conformations of butane: ww B Relative energy -1- —— 0° 60° 120° 180° 240° 300° 360° Angle of rotation Select the Newman projection that corresponds with position C on the graph (an angle of rotation of 120 degrees). HA 3 H I I I I # CH3 CH 3 CH 3 CH3 -I H HH CH3 CH3 CH3 80⁰0 CH3 H I I Н 4 000 000 % 6 MacBook Air 7 8 DIL FB 9 0

Choose all compounds shown below (A-F) that can exist as pairs of cis-trans isomers: CH3CH2CH=C(CH3)2 CH3CH=C(CH3)CH2CH3 BrCH=CHCI CH2=CHCH3 C B D A OA Ов C D ОЕ OF BrCH2CH=CHCH2Br CH3CH=C(CH2CH3)2 E F

S J G AUC 5 O F5 100000 A 6 BOOOOO C) 4 What is the proper IUPAC name for the structure shown below? NH₂ Y H Use proper IUPAC syntax with dashes (between number and letters) and commas (between numbers) as shown in the Tutorial. There should be no spaces in an IUPAC name and we do not use capital letters. Place your answer in the box. MacBook Air C tv F6 & 7 F7 U J * 00 IJZA @ DII F8 K ( O F9 0 ) L A F10 P | ' F11 { [ 11 + = 11 6-0170 F12 1