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Chapter 7: Q11P-a (page 197)

Which member in each of the following sets ranks higher?

-Hor-CH3

Short Answer

Expert verified

-CH3Ranks higher.

Step by step solution

01

E and Z designation

The cis-trans naming system works only for disubstituted alkenes having two substituents other than hydrogen on the double bond. But when trisubstituted and tetra substitution of the double bond is present then the E and Z system is used for describing alkene stereochemistry.

02

Rule for ranking substituents

  • Consider each of the double-bond carbons separately and rank the two substituents according to their atomic number of first atom in each. An atom with a higher atomic number will rank higher.
  • If the first atom same then, look at the second, third, or fourth atoms away from the double-bond until the first difference is found.
  • Multiple-bonded atoms are equivalent to the same number of single-bonded atoms.
03

Ranking of given groups

As ranking is atomic number dependent, more the atomic number higher will be ranking.

So, -CH3ranks higher.

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Most popular questions from this chapter

Name the following alkenes, and convert each drawing into a skeletal structure:

Question: Which member in each of the following sets ranks higher?

-Clor-CH2Cl

Name the following alkenes, and tell which compound in each pair is more stable:

Change the following old names to new, post-names, and draw the structure of each compound: 2,3-Dimethyl-1,3-cyclohexadiene

How many hydrogens does each of the following compounds have?

(a) C8H?O2, has two rings and one double bond

(b)C7H?N , has two double bonds

(c)C9H?NO , has one ring and three double bonds
See all solutions

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