/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q.30. Question: Draw a stepwise mechan... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 31: Q.30. (page 1231)

Question: Draw a stepwise mechanism for the conversion of neryl diphosphate to 伪-pinene, 伪-pineneis a component of pine oil and rosemary oil.

Short Answer

Expert verified

Answer

A stepwise mechanism for the conversion of neryl diphosphate to 伪-pineneis:

Step by step solution

01

Biosynthesis of terpenes and terpenoids

A diphosphate is a leaving group in the biosynthesis of terpenes and terpenoids.There are two main steps: one is forming a new sigma bond between two carbon atoms, and the other is forming a new pi bond.

02

Stepwise mechanism for the conversion of neryl diphosphate to  α-pinene

In the first step, diphosphate loss occurs, forming a resonance stabilized carbocation.

In the second step, a pi bond is formed by the proton loss (with a base B), forming a 伪-pinene.

Stepwise mechanism

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Locate the isoprene units in each compound.

a.

b.

c.

d.

Draw the products formed when triacylglycerol A is treated with each reagent. Rank compounds A, B and C in order of increasing melting point.

a.H2O,H+

b. H2(excess), Pd.C鈫�B

c.H2(1 equiv), Pd.C鈫�C

Question: An isoprene unit can be thought of as having a head and a tail. The 鈥渉ead鈥� of the isoprene unit is located at the end of the chain nearest the branch point, and the 鈥渢ail鈥� is located at the end of the carbon chain farthest from the branch point. Most isoprene units are connected together in a 鈥渉ead-to-tail鈥� fashion, as illustrated. For both lycopene (Problem 31.26), and squalene (Figure 31.9), decide which isoprene units are connected in a head-to-tail fashion and which are not.

Consider separate 1.0-L samples of O2(g) and He(g), both at 25oC and the same pressure. Compare the change in momentum per impact and the number of impacts per second in the two samples.

Draw the products formed when cholesterol is treated with each reagent. Indicate the stereochemistry around any stereogenic centers in the product.

  1. CH3COCl
  2. H2,Pd-C
  3. PCC
  4. oleicacid,H+
  5. [1]BH3路THF;[2]H2O2,-OH
See all solutions

Recommended explanations on Chemistry Textbooks

Nuclear Chemistry

Read Explanation

Physical Chemistry

Read Explanation

Organic Chemistry

Read Explanation

Chemical Reactions

Read Explanation

Chemistry Branches

Read Explanation

The Earths Atmosphere

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.