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Suppose you carry out the following reaction of ammonia and boron trifluoride in the laboratory. (a) What is the geometry of the boron atom in BF 3 ? In H 3 N→BF 3 ? (b) What is the hybridization of the boron atom in the two compounds? (c) Considering the structures and bonding of NH 3 and BF 3 , why do you expect the nitrogen on NH 3 to donate an electron pair to the B atom of BF 3 ? (d) BF 3 also reacts readily with water. Based on the ammonia reaction above, speculate on how water can interact with BF 3 .

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Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

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Chapter
Section
BuyFindarrow_forward

Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 9, Problem 51IL
Textbook Problem
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Suppose you carry out the following reaction of ammonia and boron trifluoride in the laboratory.

Chapter 9, Problem 51IL, Suppose you carry out the following reaction of ammonia and boron trifluoride in the laboratory. (a)

(a) What is the geometry of the boron atom in BF3? In H3N→BF3?

(b) What is the hybridization of the boron atom in the two compounds?

(c) Considering the structures and bonding of NH3 and BF3, why do you expect the nitrogen on NH3 to donate an electron pair to the B atom of BF3?

(d) BF3 also reacts readily with water. Based on the ammonia reaction above, speculate on how water can interact with BF3.

(a)

Interpretation Introduction

Interpretation:

The geometry of boron atom in BF3andinH3NBF3 should be determined.

Concept Introduction

Hybridization is the mixing of valence atomic orbitals to get equivalent hybridized orbitals that having similar characteristics and energy.

Geometry of a molecule can be predicted by knowing its hybridization.

TypeofmoleculeHybridaizationAtomicorbitalsusedforhybridaizationGeometryAX2sp1s+1pLinearAX3,AX2Bsp21s+2pTrigonalplanarAX4,AX3B,AX2B2sp31s+3pTetrahedralAX5,AX4B,AX3B2,AX2B3sp3d1s+3p+1dTrigonalbipyramidalAX6,AX5B,AX4B2sp3d21s+3p+2dOctahedralACentralatomXAtomsbondedtoABNonbondingelectronpairsonA

Explanation of Solution

Given reaction of ammonia and boron trifluoride is,

Due to the presence of three electron pairs around the central boron atom in BF3 molecule, it has trigonal planar structure

(b)

Interpretation Introduction

Interpretation:

The hybridization of boron atom in BF3andinH3NBF3 should be determined.

Concept Introduction

Hybridization is the mixing of valence atomic orbitals to get equivalent hybridized orbitals that having similar characteristics and energy.

Geometry of a molecule can be predicted by knowing its hybridization.

TypeofmoleculeHybridaizationAtomicorbitalsusedforhybridaizationGeometryAX2sp1s+1pLinearAX3,AX2Bsp21s+2pTrigonalplanarAX4,AX3B,AX2B2sp31s+3pTetrahedralAX5,AX4B,AX3B2,AX2B3sp3d1s+3p+1dTrigonalbipyramidalAX6,AX5B,AX4B2sp3d21s+3p+2dOctahedralACentralatomXAtomsbondedtoABNonbondingelectronpairsonA

(c)

Interpretation Introduction

Interpretation:

The nitrogen on NH3 donate an electron pair to the Boron atom of BF3. The correct reason behind this should be explained.

Concept Introduction:

Lewis structures are diagrams that represent the chemical bonding of covalently bonded molecules and coordination compounds.

It is also known as Lewis dot structures which represent the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.

The Lewis structure is based on the concept of the octet rule so that the electrons shared in each atom should have 8 electrons in its outer shell.

According to Lewis concept, acid is an electron acceptor and base is an electron donor.

(d)

Interpretation Introduction

Interpretation:

Speculate on how water can interact with BF3 like the NH3 reacts with BF3.

Concept Introduction:

Lewis structures are diagrams that represent the chemical bonding of covalently bonded molecules and coordination compounds.

It is also known as Lewis dot structures which represent the bonding between atoms of a molecule and the lone pairs of electrons that may exist in the molecule.

The Lewis structure is based on the concept of the octet rule so that the electrons shared in each atom should have 8 electrons in its outer shell.

According to Lewis concept, acid is an electron acceptor and base is an electron donor.

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Chapter 9 Solutions

Chemistry & Chemical Reactivity
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