cis - trans isomers exist in an alkene if both the substituents on both carbons of alkene are different.
In cis, same groups are on same side.
in trans, same groups are on different sides.
For each molecule, indicate whether cis-trans isomers exist. If they do, draw the two isomers and...
2. Draw the structures of the cis-trans isomers for each compound. Label them cis and trans. If no cis-trans isomers exist, write none. a. 2,3-dimethyl-2-pentene b. 1,1-dimethyl-2-ethylcyclopropane c. 1,2-dimethylcyclohexane d. 5-methyl-2-hexene e. 1,2,3-trimethylcyclopropane
3.6: Which of the following compounds can exist as cis–trans isomers? Draw each cis–trans pair. (a) CH3CH=CH2 (b) (CH3)2C=CHCH3 (c) ClCH=CHCl (d) CH3CH2CH=CHCH3 (e) CH3CH2CH=C(Br)CH3 (f) 3-Methylhept-3-ene The answer is c, d, e ,f but I'm not sure how it works
For questions #37-38) Draw the two cis-trans isomers for the following molecule CH3-CH-CH=CH
5. Indicate whether the following compounds are cis-, trans, E or Z isomers and write their names 2 x 2= 4 marks a) CH2CH3 CH3 - CH2 - C=C-CH2CH2CH3 ... CH3CI b) CH3 - C = C- CH3 / CI CI
Workshop 15 Data and Observations - Part 3 cis-Dichloroethene trans-Dichloroethene Cl CI CI H C=C C=C H H H CI (CI's on same side of the molecule) (Cl's on opposite sides of the molecule) Dipole Moment: 1.98 D Dipole Moment: Why do these dipole moment results make sense? since the clis on opposite sides of the roleale; it crosses at making trans-Dichlorestore nonpoler, C3H12 Isomers CH3-CH2-CH2-CH2-CH3 0.070 Dipole Moment: CH3 1 CH3-CH-CH2-CH3 Dipole Moment: 0.12 o D Dipole Moment: CH3...
draw the cis and trans isomers of 2-pntane and label them. b. draw trans -4,4 dimethyl-2-pentane c. draw cis -2- hexane
7. Draw and label both cis and trans isomers of 1-ethyl-4-methylcyclohexane. (10 pt) a. For each isomer, draw the two possible chairs and indicate which of the two will be preferred and by how much (a lot or little). (5 pt) b. Which of the four is considered the most stable (label as "best") and which is least stable ("worst")? (3 pt) c. Clearly label 1,3-diaxial interactions, if present, in any of the conformations? (2 pt) Cis Trans
3) For which of the following alkenes will cis- and trans-isomers not exist? H₂C C H₂O CH₂ H₃C H₂C- CH₂ H₃C CH₃ H C F G H CH I a A) a only B) b only C) both a and c D) d only E) both c and d 4) Provide the proper IUPAC name for the alkene shown below. CH, CH CC H CHỊ CH(CH3 ) A) (E)-1,2-dimethyl-1-heptene B) (E)-3,5-dimethyl-2-hexene C) (Z)-1,2-dimethyl-1-heptene D) (2)-3,5-dimethyl-2-hexene E) none of the above...
1 11-15. Determine the relationship between the following pairs of compounds. 11 trans-2-pentene and cis-2-pentene A) structural isomers 12. trans-2-pentene and cyclopentane B) Enantiomers C) not related 13. hexane and 2-methybutane D) same molecule 14. trans-2-heptene and trans-2-hexene E) geometrical (cis/trans) isomers 15 glycerol and 1,2-ethandiol (stereoisomers)
For the molecule whose condensed structural formula is given below, decide if cis-trans isomers are possible. If they are, enter the name of the cis isomer in the first box and the name of the trans isomer in the second box. If cis-trans isomers are not possible, enter the name of the compound in the first box and leave the second box blank. Do not attempt to put cis or trans in italics. CH3CH2CH=CH2