1 answer

9.78

The two lowest energy conformations of pentane are the *anti*-*anti* and the *anti*-*gauche* forms, in terms of arrangements around the two central C─C bonds. A recent study analyzed the conformations of 3-heptyne as an “elongated” analogue of pentane, where a carbon-carbon triple bond is “inserted” between C2 and C3 of pentane.[15] Interestingly, the researchers found that in each of the two most stable conformations of 3-heptyne, C1 and C6 are nearly eclipsed (looking down the alkyne group). In one of these conformations, C4 and C7 are *anti* to each other (looking down the C5─C6 bond); and in the other conformation, C4 and C7 experience a *gauche* interaction. Draw the following:

(a)

A wedge-and-dash structure for each of the two lowest energy conformations of pentane.

(b)

A wedge-and-dash structure of the conformer of 3-heptyne that is analogous to *anti*-*anti* pentane.

(c)

A Newman projection that illustrates the eclipsed nature of the low-energy conformations of 3-heptyne.

(d)

Newman projections that illustrate the difference between the two lowest energy conformations of 3-heptyne.

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A massless rigid rod is friction free at the left end. At the center of the...

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Below is the graph of of an unknown function g(x). The aim of this question is to use the graph to describe features of the integral of g(x) between -1 and x, that is, the area enclosed by the graph...

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Op Save and Chech Fuzzy Monkey Technologies, Inc., purchased as a short-term investment $200 million of...

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4. Red Osier runs a seafood and steak restaurant in Stafford and also operates a food...

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At the beginning of the period, a company reports a balance in office supplies of $550....

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Dr Consider the system: = 4x – 2y dy = x + y dt (a) Determine...

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Thomas Taylor plans to invest $24,300 a year at the end of each year for the...

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Gary's TV had the following accounts and amounts in its financial statements on December 31, 2016....

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Use log 67 = 1.946 and/or log 58= 2.079 to find logba logoő-0

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The probability distribution of a quantum mechanical system is determined by O 1812 Οψ 1-

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On January 1, two years ago, Parkway Corporation purchased all of the outstanding common stock of...

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Complete the table: Compound Mass Moles Number of molecules CO2 _____ 0.0162 _____ CO _____ 0.0189...

Complete the table: Compound Mass Moles Number of molecules CO2 _____ 0.0162 _____ CO _____ 0.0189 _____ BrI 31.4 mg _____ _____ CF2Cl2 1.48 kg _____ _____ Part A: Complete the second column of the table. Enter your answers numerically separated by a comma. Part B: Complete the third c...