Domanda del libro di testo
For each statement, indicate whether it is true or false. (d) Nonbonding electron pairs cannot occupy a hybrid orbital.
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Ch.9 - Molecular Geometry and Bonding Theories
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement146
- Ch.2 - Atoms, Molecules, and Ions200
- Ch.3 - Chemical Reactions and Reaction Stoichiometry176
- Ch.4 - Reactions in Aqueous Solution155
- Ch.5 - Thermochemistry126
- Ch.6 - Electronic Structure of Atoms131
- Ch.7 - Periodic Properties of the Elements126
- Ch.8 - Basic Concepts of Chemical Bonding123
- Ch.9 - Molecular Geometry and Bonding Theories143
- Ch.10 - Gases147
- Ch.11 - Liquids and Intermolecular Forces91
- Ch.12 - Solids and Modern Materials122
- Ch.13 - Properties of Solutions126
- Ch.14 - Chemical Kinetics174
- Ch.15 - Chemical Equilibrium101
- Ch.16 - Acid-Base Equilibria139
- Ch.17 - Additional Aspects of Aqueous Equilibria146
- Ch.18 - Chemistry of the Environment72
- Ch.19 - Chemical Thermodynamics129
- Ch.20 - Electrochemistry142
- Ch.21 - Nuclear Chemistry101
- Ch.22 - Chemistry of the Nonmetals68
- Ch.23 - Transition Metals and Coordination Chemistry66
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry10
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970Non è quello che usi tu?Cambia libro di testo
Capitolo 9, Problema 44
Dichlorobenzene, C6H4Cl2, exists in three forms (isomers) called ortho, meta, and para:
Which of these has a nonzero dipole moment?
Guida verificata passo dopo passo1
Understand that dichlorobenzene (C_6H_4Cl_2) can exist in three isomeric forms: ortho, meta, and para, based on the relative positions of the chlorine atoms on the benzene ring.
Recall that a dipole moment arises from the difference in electronegativity between atoms, leading to a separation of charge.
Consider the molecular geometry of each isomer: in the ortho isomer, the chlorine atoms are adjacent; in the meta isomer, they are separated by one carbon atom; and in the para isomer, they are opposite each other on the benzene ring.
Analyze the symmetry of each isomer: the para isomer is symmetrical, which often leads to the cancellation of dipole moments, resulting in a net dipole moment of zero.
Conclude that the ortho and meta isomers have nonzero dipole moments due to their asymmetrical structures, which do not allow for complete cancellation of the dipole moments.
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Molecular Polarity
Molecular polarity refers to the distribution of electrical charge over the atoms in a molecule. A molecule is polar if it has a net dipole moment, which occurs when there is an uneven distribution of electron density, often due to differences in electronegativity between atoms. This results in one end of the molecule being partially positive and the other end being partially negative.
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02:38
Molecular Polarity
Dipole Moment
The dipole moment is a vector quantity that measures the separation of positive and negative charges in a molecule. It is calculated as the product of the charge and the distance between the charges. A nonzero dipole moment indicates that the molecule has a polar character, while a zero dipole moment suggests that the molecule is nonpolar, often due to symmetrical arrangements of atoms.
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01:25Dipole Moment
Isomerism in Organic Chemistry
Isomerism occurs when two or more compounds have the same molecular formula but different structural arrangements or spatial orientations. In the case of dichlorobenzene, the ortho, meta, and para isomers differ in the positions of the chlorine atoms on the benzene ring. These structural differences can significantly affect the physical properties of the compounds, including their polarity and dipole moments.
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02:26Introduction to Organic Chemistry
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Dichloroethylene (C2H2Cl2) has three forms (isomers), each of which is a different substance. (b) Which of these isomers has a zero dipole moment?
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Dichloroethylene (C2H2Cl2) has three forms (isomers), each of which is a different substance. (c) How many isomeric forms can chloroethylene, C2H3Cl, have? Would they be expected to have dipole moments?
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