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Course
SCIENCE CHEM 10
Subject
Chemistry
Date
Dec 18, 2024
Pages
5
Uploaded by ChancellorKookabura3961
iice packet: Unit 12 Organic Chemistry > 'esson 3: Branched Hydrocarbons objective: « Determine the name of branched alkanes Name the following Branched Alkanes H [} C=H fa AL T 2 mathyl Dukar H-C—C—C-C-H U U gy H. o -He s HaH 3- Mty | peytrans B S TG SR SRR EE SR e wiiny i 22,4 trimethyg) pentant Hi=% H 3 -ef \\ujl hix ane H n i —é-n A% Al\m.\\uj\ butang H
Practice Packet: Unit 12 Organic Chemistry hy H=C=H H-C=H HH | H H Holmlmmim o ; e WA N 3-gkhyl-d-medhyl pentang H=C-H i H 1y H-(I:-H 4l 5 v INET -yl i H-S-Namiinie HH H HH LS 1y H=C=H 1 H=C=H LA ‘ Sl Het e Oyl -y-nubiy | [ H] W o i ‘ H=C=H ' H 33,5 - trimithy) g prane H3C——CH;——CH,;—CH,—CH, H,c—crl,—-—'cu,—cuz—T——cHz—CH: CH, 5yl -5 medtyl decane CHy;—CH, HyC——CH,—C———CH,—CH, CHy—CH;, 3.3- diethyl pertane | 23 ¢ bt nZens Y HW—Hu/l
4-ethyl-octane 2-methyl-nonane 3-ethyl-2,2-dimethyl-hexane 3,3-dimethyl-pentane 2,2,3-trimthylbutane ,(/('4(‘(_ [ 3-ethyl-2,2-dimethylhexane it R I S 4-ethyl octane 3-ethyl-2-methylheptane T O - T 11
Practice Packet: Unit 12 Organic Chemistry MORE CHALLENGING BRANCHED STRUCTURES: NAMING ALKENES: The steps for naming alkenes are given below. 1. Find the longest continuous carbon chain that contains the double bond, and number from the end nearer the double bond. 2. Write the alkane name corresponding to the number of carbons, changing the —ane to —ene. 3. Identify by number the lower-numbered carbon atom containing the double bond, followed by a hyphen directly before the alkene name. 4. If substituent groups are present, they should precede the name of the alkene in the usual way. *NAMING POLYUNSATURATED ALKENES: A polyunsaturated alkene has more than one double bond. 5. List the lower numbered carbons containing the double bonds, separated by a comma. 6. After the alkane name, -di- is used to signify 2 double bonds, followed by —ene. CH; e - 6 5 HiC—S e 4 3 HaC Y—cHy Hze ¢Hy STEPS1&2: hexene STEP 3: 2-hexene STEP 4: 4-ethyl-5-methyl-2-hexene hex-2-ene 4-ethyl-5-methyl-hex-2-ene PRACTICE: Name the following according to the rules above: T e b. emdl : "l “Merhy-3-neplens quf’mew 1% kaad\w, NAMING ALKYNES: Alkynes are unsaturated hydrocarbons that contain a triple bond. To name alkynes, follow the same process you used for naming alkenes except substitute the suffix —yne. PRACTICE: H3C—\\\_<CH3 HC . A b. CHs ¢ HiC =CcH > Y - me Yyl 3- unlovo - bwrgne " TRILYY i 2-penyy - pertyne.
Practice Packet: Unit 12 Organic Chemistry CYCLIC ALKANES, ALKENES & ALKYNES: Cycloalkanes, cycloalkenes and cycloalkynes have ring structures. The prefix “cyclo” is used in the name. Numbering begins at the muitiple bond and moves in the direction toward the nearest branch, the goal being to assign the lowest numbers possible to the branch. All other naming rules are followed. Examples: ) CHs ) L ¥ cH, 5_CH, 6 4 AN é Br 3-ethyl-5-melhylcyclohexyne 5-bromo-3-ethylcyclohexene 1-chloro-2,3,4-trimethylcyclopentane PRACTICE: CHj H3C Hac CH3 . a. 3'*“"3' ‘-lfmufhy‘ b. - e¥hyl 2,3'd(m&('hlfi‘ L CLO pEVHER. w A0 peyHane Mixed Practice A o Name the following: HaC CHy H,C \\ Hac—\\ C‘ Hy Hy C—>‘<Br a CHy; CH, b. HoC c. HC CHg 1) - 0 Y4 - dimethyl Y-outyl 2= Y ey 2- hxent 2- 0CY L 2-peniene = CHs i HaC‘QCH;g H3C<<\——</:CH3 d. BHy e. CHy f. CHy 2,Y- dimethy | 2 -e¥ny 1-propyl 2,Y4-Nxadiens, 12