(a) Interpretation: The species that is smaller between the given pair is to be predicted and an explanation for the correct choice in terms of electron structure is to be stated. Concept Introduction: Cations are always smaller than the atoms from which they are formed because they have lesser number of electrons than the parent atom due to which the force of attraction between protons and electrons increases size decreases. Anions are always larger than the atoms from which they are formed because they have more number of electrons than the parent atom due to which the repulsion between the electrons increases, the force of attraction between protons and electrons, decreases, and the size increases.
(a) Interpretation: The species that is smaller between the given pair is to be predicted and an explanation for the correct choice in terms of electron structure is to be stated. Concept Introduction: Cations are always smaller than the atoms from which they are formed because they have lesser number of electrons than the parent atom due to which the force of attraction between protons and electrons increases size decreases. Anions are always larger than the atoms from which they are formed because they have more number of electrons than the parent atom due to which the repulsion between the electrons increases, the force of attraction between protons and electrons, decreases, and the size increases.
Solution Summary: The author explains that the species that is smaller between the given pair is to be predicted and an explanation for the correct choice in terms of electron structure.
The species that is smaller between the given pair is to be predicted and an explanation for the correct choice in terms of electron structure is to be stated.
Concept Introduction:
Cations are always smaller than the atoms from which they are formed because they have lesser number of electrons than the parent atom due to which the force of attraction between protons and electrons increases size decreases.
Anions are always larger than the atoms from which they are formed because they have more number of electrons than the parent atom due to which the repulsion between the electrons increases, the force of attraction between protons and electrons, decreases, and the size increases.
Interpretation Introduction
(b)
Interpretation:
The species that is smaller between the given pair is to be predicted and an explanation for the correct choice in terms of electron structure is to be stated.
Concept Introduction:
Cations are always smaller than the atoms from which they are formed because they have lesser number of electrons than the parent atom due to which the force of attraction between protons and electrons increases size decreases.
Anions are always larger than the atoms from which they are formed because they have more number of electrons than the parent atom due to which the repulsion between the electrons increases, the force of attraction between protons and electrons, decreases, and the size increases.
Interpretation Introduction
(c)
Interpretation:
The species that is larger between the given pair is to be predicted and explanation for the correct choice is to be stated.
Concept Introduction:
Compounds formed from ions are known as ionic compounds. The compound consists of the cation and anion. Cation is the positively charged ion and anion is negatively charged ion.
Cations are always smaller than the atoms from which they are formed because they have lesser number of electrons than the parent atom due to which the force of attraction between protons and electrons increases size decreases.
Anions are always larger than the atoms from which they are formed because they have more number of electrons than the parent atom due to which the repulsion between the electrons increases, the force of attraction between protons and electrons, decreases, and the size increases.
Interpretation Introduction
(d)
Interpretation:
The species that is larger between the given pair is to be predicted and explanation for the correct choice is to be stated.
Concept Introduction:
Cations are always smaller than the atoms from which they are formed because they have lesser number of electrons than the parent atom due to which the force of attraction between protons and electrons increases size decreases.
Anions are always larger than the atoms from which they are formed because they have more number of electrons than the parent atom due to which the repulsion between the electrons increases, the force of attraction between protons and electrons, decreases, and the size increases.
The Concept of Aromaticity
21.15 State the number of 2p orbital electrons in each molecule or ion.
(a)
(b)
(e)
(f)
(c)
(d)
(h)
(i)
DA
(k)
21.16 Which of the molecules and ions given in Problem 21.15 are aromatic according to the
Hückel criteria? Which, if planar, would be antiaromatic?
21.17 Which of the following structures are considered aromatic according to the Hückel
criteria?
---0-0
(a)
(b)
(c)
(d)
(e)
(h)
H
-H
.8.0-
21.18 Which of the molecules and ions from Problem 21.17 have electrons donated by a
heteroatom?
1. Show the steps necessary to make 2-methyl-4-nonene using a
Wittig reaction. Start with triphenylphosphine and an alkyl
halide. After that you may use any other organic or inorganic
reagents.
2. Write in the product of this reaction:
CH3
CH₂
(C6H5)₂CuLi
H₂O+
3. Name this compound properly, including stereochemistry.
H₂C
H3C
CH3
OH
4. Show the step(s) necessary to transform the compound on the
left into the acid on the right.
Bri
CH2
5. Write in the product of this
LiAlH4
Br
H₂C
OH