Which can have cis/trans isomers? and why? (1). 1,2,3-trimethylcyclopropane (2.) 1,2-dimethylbenzene (3.) 2,3-dimethyl-4-decene
Answer:
(3.) 2,3-dimethyl-4-decene
The two essential conditions for cis-trans isomerism are
(i) There must be restricted free rotation due to the presence of double bond or a cyclic structure.
(ii) The molecule must have WXC=CYZ form,
2,3-dimethyl-4-decene alone satisfies both these conditions
Which can have cis/trans isomers? and why? (1). 1,2,3-trimethylcyclopropane (2.) 1,2-dimethylbenzene (3.) 2,3-dimethyl-4-decene
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
Which of the following compounds can have cis and trans isomers? 2-Methyl-2-butene Propene 0 1-Butene 1,2-Dichloro-1-Bu What is the correct molecular formula of 2,4-Diethyltouleno OCHA 0 C₂ H₂2 G H C:oH20 18 Which of the following compounds can have cis and trans isomers? 1-Butene 2-Methyl-2-butene 1,2-Dichloro-1-Butene Propene CH3CHBr2 is obtained from O Reaction of ethyne with one mole of HBr O Reaction of ethyne with one mole of Br2 Reaction of ethyne with two moles of Br2 Reaction of ethyne...
How many of the following compounds could exhibit cis/trans isomers? i. 2,3-dichloro-2-butene ii. 2,3-dimethyl-2-butene iii. dibromoethyne iv. (CH3),CHCH V. The monomer used to form: n Select one: O a. O O b.1 O c. 2 d. 3 e. 4 ОО 1.5
How many of the following compounds could exhibit cis/trans isomers? i. 2,3-dichloro-2-butene ii. 2,3-dimethyl-2-butene iii. dibromoethyne iv. (CH3)2CHCH3 V. The monomer used to form: n
Why are there only 3 isomers of pentane? Why doesn't butyne have cis and trans isomers? Why is there no such thing as 3-butyne?
B/ You have absorption spectra for: 1/ Methylbenzene 3/1,3 Dimethylbenzene 2/ 1,2 Dimethylbenzene 4/1,4 Dimethyl benzene Connect each of the four structures to the corresponding compound, with the Inference: 1 2500 2000 1800 1600 1400 1200 1000 800 600 3500 3000 Frequency cm 8 9 10 12 15 3500 3000 2500 2000 1800 1600 1400 1200 1000 800 600 Frequency cm-1 The spectrum refers to the Geometrical Isomerism: The most important absorptions is:
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
CI 5. Can either of these compounds exist as a pair of cis-trans isomers? CI 6. Name or draw: me to (Z)-2,3-Dimethyl-1,3- hexdiene
Which type of biomolecule can have cis/trans isomers?
Draw both cis and trans isomers for 3-ethyl-2,5-dimethyl-4-octene (hope i spelled that molecule correctly).