Domanda del libro di testo
Draw sketches illustrating the overlap between the following orbitals on two atoms: (a) the 2s orbital on each atom
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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 43b
Dichloroethylene (C2H2Cl2) has three forms (isomers), each of which is a different substance. (b) Which of these isomers has a zero dipole moment?
Guida verificata passo dopo passo1
Understand that dichloroethylene (C2H2Cl2) has three isomers: 1,1-dichloroethylene, cis-1,2-dichloroethylene, and trans-1,2-dichloroethylene.
Recall that a molecule's dipole moment is determined by the vector sum of the individual bond dipoles. A zero dipole moment means the bond dipoles cancel each other out.
Visualize or draw the structures of the three isomers: 1,1-dichloroethylene has both Cl atoms on the same carbon, cis-1,2-dichloroethylene has Cl atoms on adjacent carbons on the same side, and trans-1,2-dichloroethylene has Cl atoms on adjacent carbons on opposite sides.
Analyze the symmetry of each isomer: trans-1,2-dichloroethylene is symmetrical, which allows the dipoles to cancel out, resulting in a zero dipole moment.
Conclude that trans-1,2-dichloroethylene is the isomer with a zero dipole moment due to its symmetrical structure.
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Isomerism
Isomerism refers to the phenomenon where two or more compounds have the same molecular formula but different structural arrangements or spatial orientations. In the case of dichloroethylene (C2H2Cl2), the isomers can differ in the position of the chlorine atoms or the arrangement of the carbon-carbon double bond, leading to distinct chemical and physical properties.
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2:14
Isomerism in Coordination Complexes Example
Dipole Moment
The dipole moment is a measure of the separation of positive and negative charges in a molecule, indicating its polarity. A molecule with a dipole moment has an uneven distribution of electron density, resulting in a positive and a negative end. Molecules with symmetrical structures can have a zero dipole moment, as the individual bond dipoles cancel each other out.
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01:25Dipole Moment
Molecular Symmetry
Molecular symmetry plays a crucial role in determining the dipole moment of a molecule. Symmetrical molecules, such as the trans isomer of dichloroethylene, can have their dipole moments cancel out due to equal and opposite charge distributions, resulting in a net dipole moment of zero. Understanding the symmetry of a molecule helps predict its physical properties, including polarity.
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02:38Molecular Polarity
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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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