1. Which match is correct for thermal [2+2] cycloaddition reaction (a) suprafacial /suprafacial →Allowed Antrafacial /Suprafacial → Forbidden (b) Suprafacial/SuprafacialAllowed Antarofacial/ Suprafacial Allowed (c) Suprafacial /Suprafacial → Forbidden Antarafacial / Suprafacial→Forbidden (d) Suprafacial/Suprofacial Forbidden Antarafacial/SuprafacialAllowed

1. Which match is correct for thermal [2+2] cycloaddition reaction (a) suprafacial /suprafacial →Allowed Antrafacial /Suprafacial → Forbidden (b) Suprafacial/SuprafacialAllowed Antarofacial/ Suprafacial Allowed (c) Suprafacial /Suprafacial → Forbidden Antarafacial / Suprafacial→Forbidden (d) Suprafacial/Suprofacial Forbidden Antarafacial/SuprafacialAllowed

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter7: Cycloalkanes

Section: Chapter Questions

Problem 17E: Build a model of methylcyclohexane, and use the model to complete the following Newmanprojections of...

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iupac nme include stereochemistry if ncessary
Examine the following pericyclic reactions. For each reaction, tell whether it is an electrocyclic reaction, a cycloaddition reaction, or a sigmatropic rearrangement.
Which conformer in present is greater amount at equilibrium? Is the reaction spontaneous or non spontaneous
Classify each pericyclic reaction as an electrocyclic reaction,cycloaddition, or sigmatropic rearrangement. Indicate whether thestereochemistry is conrotatory, disrotatory, suprafacial, or antarafacial.
As we learned, monosubstituted cyclohexanes exist as anequilibrium mixture of two conformations having either an axial orequatorial substituent. When R = CH2CH3, Keq for this process is 23.When R = C(CH3)3, Keq for this process is 4000. Question: a.) For which R is ΔGo more negative?b.) How is the size of R related to the amount of axial and equatorialconformations at equilibrium?
draw a table showing selection rule for m+n cycloaddition and cyclo reversion reactions
Classify each pericyclic reaction as an electrocyclic reaction, cycloaddition, or sigmatropic rearrangement. Indicate whether the stereochemistry is conrotatory, disrotatory, suprafacial, or antarafacial.
Which of the following statements about cycloaddition reactions is not true? Cycloaddition reactions form a cyclic product with two new  bonds. The course of the reaction is determined by the symmetry of the molecular orbitals of the products. Cycloaddition reactions are concerted. Cycloaddition reactions are stereospecific.
a. which is more stable? b. which is least stable?
In some nucleophilic substitutions under SN1 conditions, complete racemization does not occur and a small excess of one enantiomer is present. For example, treatment of optically pure 1-bromo-1-phenylpropane with water forms 1- phenylpropan-1-ol. (a) Calculate how much of each enantiomer is present using the given optical rotation data. (b) Whichproduct predominates—the product of inversion or the product of retention of conguration? (c) Suggest an explanation for this phenomenon.
In some nucleophilic substitutions under SN1 conditions, complete racemization does not occur and a small excess of one enantiomer ispresent. For example, treatment of optically pure 1-bromo-1phenylpropane with water forms 1-phenylpropan-1-ol. (a) Calculate how much of each enantiomer is present using the given optical rotation data. (b) Which product predominates—the product of inversion or the product of retention of configuration? (c) Suggest an explanation for this phenomenon.
The bicyclic alkene P can be prepared by thermal electrocyclic ringclosure from cyclodecadiene Q or by photochemical electrocyclic ringclosure from cyclodecadiene R. Draw the structures of Q and R, andindicate the stereochemistry of the process by which each reactionoccurs.