Concept explainers
(a)
Interpretation:
The skeletal structure of E-3,4-dimethyl-3-heptene needs to be drawn and the reason for naming trans in spite of having identical groups needs to be explained.
Concept Introduction :
The compounds are named as E-Z based on analysis of the groups at the end of double bond. The naming is done as per the CIP rules wherein the highest priority gets its preference meaning the highest
(b)
Interpretation:
The configurational isomers of E-3,4-dimethyl-3-heptene needs to be drawn and named.
Concept Introduction :
Configurational isomers are stereoisomers which cannot get converted to another compound by rotation of molecules about a single bond. It is possible to be converted only by breaking of the bonds.
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Organic Chemistry: A Guided Inquiry
- to Medical Chemistry II. (BMC1CHEM02) oard / My courses / Introduction to Medical Chemistry II. (BMCICHEM02) / 29/03 2021 Chemistry Electronic te Electronic test in Chemistry n3 Cyclobutane is more stable molecule than cyclopropane, because.... Select one: ut of it has less angle strain. cyclobutane has a cis-trans stereoisomers. cyclobutane is a larger ring. it has more torsional strain. cyclopropane is planar. Next pagearrow_forwardUse flat representation of rings, not chair in the drawing. Determine the most and least stable. Consider the most stable chair for each of these isomers, and then draw the most stable and least stable isomer based on a comparison of the best chair for each one.arrow_forwardPlease read question carefully. Asking the question for a second time. thank youarrow_forward
- . Consider the hash/wedge structure below. a. Draw the Newman projection of the bond indicated, keeping the conformation the same. НО b. Draw the Newman projection for the most stable conformation CI c. In the Newman projection for part b, label all gauche interactions.arrow_forwardPlease how would you draw the least and most stable in “flat” representations of rings, not chairs for both most/least drawing. please help.arrow_forward3. Complete the following 3 tasks for each molecule a-f. i. Label each molecule as chiral, achiral, optically active, ii. iii. optically inactive, and/or meso. Label any stereocenters found in each molecule as R or S. Identify the relationship between the molecule in the box and molecules a-f. Are they identical molecules, resonance structures, enantiomers, diastereomers, constitutional isomers, or molecules with different molecular formulas? A molecular model kit may help you compare structures. a. C. e. :O: d. .N. :O: بعد ہم f. :O: :0 N.arrow_forward
- The following molecule A is drawn in such a way that its 3D structure is ambiguous. a. Circle the atoms that are stereocenters. b. Based on the number of atoms you circled in part a, what is the maximum number of stereocenters possible for A? Show your calculations. c. Draw all the possible stereoisomer of A (wedge drawings, not Fisher) and label their stereoisomeric relationships (diastereomers, enantiomers). d. Label each stereocenter with its R and S configuration. OH LOCH3 Brarrow_forward, draw its and then in the 2. For (1R, 2S, 4R)-4-tert-buyl-1-ethyl-2-methylcyclohexane: draw its correct skeletal structure most stable conformer first showing the Hydrogens that are directly attached to the ring last stusture omit the hydrogens that are directly connected to the ring and draw the correct positions of the three alkyl groups in skeletal representation. Draw all bonds with the same length! 5. draw the correct skeletal structure here showing stereochemistry on this chair draw the most stable conformer including the H's directly attached to the ring on this chair draw only the alkyl groups, all bonds same lenghtarrow_forwardFor the the structure shown below, Part A) Draw the Newman projections and 3-D sawhorse structures corresponding to the lowest and highest energy conformations for rotation around the C2-C3 bond. Draw the Newman projections looking FROM THE C2 CARBON TO THE C3 CARBON (i.e. with the C2 carbon in the "front"). Part B) Determine the energy difference between the lowest and highest conformations, and be sure to clearly show each energy contribution that you are including in your calculation. 2,3-dimethylpentane ECLIPSING Interactions AB Energy kcal/mol H/H 1.0 H / Me 1.4 H/Et 1.5 H/i-Pr 1.6 H/t-Bu 3.0 Me / Me 2.6 Me / Et 2.7 Me/i-Pr 3.0 GAUCHE A. Interactions Me / Me Me / Et Me / i-Pr Me / t-Bu Et / Et Et / -Pr Et/t-Bu i-Pr/i-Pr B Energy kcal/mol 0.9 0.95 1.1 2.7 1.1 1.6 3.0 2.0arrow_forward
- For the the structure shown below, Part A) Draw the Newman projections and 3-D sawhorse structures corresponding to the lowest and highest energy conformations for rotation around the C2-C3 bond. Draw the Newman projections looking FROM THE C2 CARBON TO THE C3 CARBON (i.e. with the C2 carbon in the "front"). Part B) Determine the energy difference between the lowest and highest conformations, and be sure to clearly show each energy contribution that you are including in your calculation. Lowest Energy Conformation 3-D sawhorse Newman ECLIPSING Interactions AB H/H H/Me H / Et H/i-Pr Energy kcal/mol 1.0 1.4 1.5 1.6 H/ t-Bu 3.0 Me / Me 2.6 Me / Et 2.7 Mei-Pr 3.0 GAUCHE A. Interactions Me / Me Me / Et Me / i-Pr Me / t-Bu Et / Et Et/i-Pr Et / t-Bu i-Pr/i-Pr 3-D sawhorse Energy kcal/mol Newman 0.9 0.95 1.1 2.7 1.1 1.6 Highest Energy Conformation 3.0 2.0arrow_forwardYour document is saved. Click CONVERT A. Conjugated Molecules I I) Designate each molecule as conjugated or not conjugated. For conjugated molecules, circle the atoms that are conjugated. HO. NH2 но. HO ... Chat with II) Use the molecule below to answer the following: a) Number of lone pairs 10 Automatic Zoom 2020, LegalSimpli Software, LLC. a subsidiary of Conversion Labs, Inc., All rights res + t Page: 1 of 2 MacBook Proarrow_forwarddraw clearly and draw out Ch3 bc can't inputarrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning