Resonance Hybrid
Resonance Hybrid - Related Videos
02:18
Resonance and Hybrid Structures
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2026
According to the theory of resonance, if two or more Lewis structures with the same arrangement of atoms can be written for a molecule, ion, or radical, the actual distribution of electrons is an average of that shown by the various Lewis structures.Resonance Structures and Resonance HybridsThe Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N–O and N=O bonds.If nitrite ions contain a single and a double bond, the two...
02:52
Resonance
0 Views •
2020
The Lewis structure of a nitrite anion (NO2−) may actually be drawn in two different ways, distinguished by the locations of the N-O and N=O bonds. If nitrite ions do indeed contain a single and a double bond, the two bond lengths are expected to be different. A double bond between two atoms is shorter (and stronger) than a single bond between the same two atoms. However, experiments show that both N–O bonds in NO2− have the same strength and length, and are identical in all other...
03:24
Hybridization of Atomic Orbitals I
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2020
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
08:00
Whole-Mount In Situ Hybridization
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2023
Whole-mount in situ hybridization (WMISH) is a common technique used for visualizing the location of expressed RNAs in embryos. In this process, synthetically produced RNA probes are first complementarily bound, or "hybridized," to the transcripts of target genes. Immunohistochemistry or fluorescence is then used to detect these RNA hybrids, revealing spatial and temporal patterns of gene expression. Unlike traditional in situ hybridization techniques, which require thin tissue sections whose...
03:35
Hybridization of Atomic Orbitals II
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2020
sp3d and sp3d 2 Hybridization To describe the five bonding orbitals in a trigonal bipyramidal arrangement, we must use five of the valence shell atomic orbitals (the s orbital, the three p orbitals, and one of the d orbitals), which gives five sp3d hybrid orbitals. With an octahedral arrangement of six hybrid orbitals, we must use six valence shell atomic orbitals (the s orbital, the three p orbitals, and two of the d orbitals in its valence shell), which gives six sp3d 2 hybrid orbitals.
FAQs
Resonance contributors should not be interpreted as molecules rapidly switching between alternative structures. Because the atomic framework stays fixed, their quantum-mechanical combination describes one electronic structure with delocalized electron density. This distinction matters when interpreting stability and bonding: the hybrid is not a time-averaged mixture, but the chemically meaningful structure produced by combining the contributors.
Delocalized electron density distributes bonding character across positions represented differently in individual contributors. As a result, bonds that appear distinct in separate drawings can become equalized in the actual structure, with bond orders that are intermediate rather than confined to one contributor’s arrangement. This pattern provides a structural basis for recognizing resonance in molecules and ions.
Partial charges express how delocalized electron density is distributed rather than assigning all electronic character to one localized arrangement. Reading these charges alongside bond orders helps connect a resonance description with molecular stability and chemical behavior. In chemistry, that information can support explanations of why some structures are stabilized and why their reactivity may follow particular pathways.
Begin with the unchanged atomic framework, then identify two or more valid contributors that differ only in where electrons are placed. Combining those contributors gives the electronic description used for interpretation. The resulting representation should be evaluated through its delocalized electron density, partial charges, and bond orders, rather than by treating the drawings as separate species.
Benzene, carbonate, and carboxylate ions provide contrasting examples in which resonance reasoning helps explain equalized bond lengths and enhanced stability. These cases are useful because the structural and energetic features are not adequately represented by focusing on one contributor alone. Comparing them also shows how the same bonding principle applies to both molecules and ions.
Once the delocalized electronic structure is recognized, it can inform predictions about molecular geometry, acidity, reactivity, and reaction pathways. The value is interpretive: electron distribution and bond-order patterns connect a structural representation to expected chemical behavior. Thus, resonance analysis extends beyond drawing contributors and helps organize explanations of stability and transformations in chemistry.