The correct sterochemical descriptor for the alkenes in permethrin and bifentrin has to be determined. Concept introduction: Alkenes are one of the important types of hydrocarbon which have at least one carbon-carbon double bond ( C = C ). According to the I nternational U nion for P ure and A pplied C hemistry the name of an alkane ends with ene. Alkenes have a general formula C n H 2 n where n is the number of carbon atom. E-Z designators are used as like cis-trans terminology for non-similar groups attached alkenes. In E-Z designations, the groups attached to vinylic positions are checked by their priority on the basis of higher molecular weight . If the higher priority groups are on the same sides , then the configuration is designated as Z . If the higher priority groups are on the opposite sides , then the configuration is designated as E. Permethrin and bifenthrin are the synthetic pyretherenoids now in common use in household and agricultural products. Their structure is given below,

Question

Want to see the full answer?

Answer 1

Question

Chapter 17.8, Problem AQ

Interpretation Introduction

Interpretation: The correct sterochemical descriptor for the alkenes in permethrin and bifentrin has to be determined.

Concept introduction:

Alkenes are one of the important types of hydrocarbon which have at least one carbon-carbon double bond (C=C ). According to the International Union for Pure and Applied Chemistry the name of an alkane ends with ene. Alkenes have a general formula CnH2n where n is the number of carbon atom.

E-Z designators are used as like cis-trans terminology for non-similar groups attached alkenes.

In E-Z designations, the groups attached to vinylic positions are checked by their priority on the basis of higher molecular weight. If the higher priority groups are on the same sides, then the configuration is designated as Z. If the higher priority groups are on the opposite sides, then the configuration is designated as E.

Permethrin and bifenthrin are the synthetic pyretherenoids now in common use in household and agricultural products.

Their structure is given below,

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

Eugenol is a natural product derived from the dried flower buds of the evergreentree, Eugenia aromatica. Briefly describe a procedure with reagents required toextract eugenol as a single component from the mixture of compounds presentin these flower buds.

Both pyridine and pyrrole are nitrogen containing aromatic heterocyclic compounds. When treated with HCl, only pyridine forms the hydrochloride salt, where as pyrrole is unreactive. What is the best explanation for this observed reactivity.

(−)-Hyoscyamine, an optically active drug used to treat gastrointestinal disorders, is isolated from Atropa belladonna, the deadly nightshade plant, by a basic aqueous extraction procedure. If too much base is used during isolation, optically inactive material is isolated. (a) Explain this result by drawing a stepwise mechanism. (b) Explain why littorine, an isomerisolated from the tailower plant in Australia, can be obtained optically pure regardless of the amount of base used during isolation.