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Valence Bond Theory

In chemistry, valence bond (VB) theory is one of the two basic theories, along with molecular orbital (MO) theory, that were developed to use the methods of quantum mechanics to describe chemical bonding.

Version
v1 · 2026-09-28 · History
Domain-specific #
12749
Domain group
Natural Sciences
Origin domain
Chemistry & Materials Science
Subdomains
Quantum Chemistry, Chemical Bonding → Chemistry & Materials Science

Core Idea

Valence Bond Theory is treated here as the recurring natural science, engineering, and health identity summarized by this source-grounded definition: In chemistry, valence bond (VB) theory is one of the two basic theories, along with molecular orbital (MO) theory, that were developed to use the methods of quantum mechanics to describe chemical bonding. In chemistry, valence bond (VB) theory is one of the two basic theories, along with molecular orbital (MO) theory, that were developed to use the methods of quantum mechanics to describe chemical bonding.

Scope of Application

  • History. Specifically, Walter Heitler determined how to use Schrödinger's wave equation (1926) to show how two hydrogen atom wavefunctions join together, with plus, minus, and exchange terms, to form a covalent bond.

  • History. Later, Linus Pauling used the pair bonding ideas of Lewis together with Heitler–London theory to develop two other key concepts in VB theory: resonance (1928) and orbital hybridization (1930).

  • Theory. A valence bond structure resembles a Lewis structure, but when a molecule cannot be fully represented by a single Lewis structure, multiple valence bond structures are used.

  • Comparison with MO theory. Simple VB theory includes only covalent structures (for neutral molecules), but can be refined by adding terms for ionic structures to the wave function.

  • Comparison with MO theory. If many terms are considered in the wave functions, the two theories approach mathematical equivalence, However MO is a more popular approach than VB due to its easier implementation in the.

Clarity

A clear use of Valence Bond Theory names the carrier, the operative relation, and the conditions under which the source treats the identity as present. The minimal definition is In chemistry, valence bond (VB) theory is one of the two basic theories, along with molecular orbital (MO) theory, that were developed to use the methods of quantum mechanics to describe chemical bonding.

Manages Complexity

Valence Bond Theory compresses multiple natural science, engineering, and health details into a stable diagnostic relation. The source shows both the central mechanism—for example, in the case of the F 2 molecule, the F−F bond is formed by the overlap of p z orbitals of the two F atoms, each containing an unpaired electron.—and the practical consequence—although there is no mathematical formula either in chemistry or.

Abstract Reasoning

  1. Type the carrier. Identify the natural science, engineering, and health entities to which the claim applies.
  2. State the relation. Use the source-grounded identity: In chemistry, valence bond (VB) theory is one of the two basic theories, along with molecular orbital (MO) theory, that were developed to use the methods of quantum mechanics to describe chemical bonding.
  3. Check operation and conditions.

Knowledge Transfer

Within the home domain. Knowledge about Valence Bond Theory transfers literally when a new case preserves the same carrier type, relation, and recognition test. Specifically, Walter Heitler determined how to use Schrödinger's wave equation (1926) to show how two hydrogen atom wavefunctions join together, with plus, minus, and exchange terms, to form a covalent bond. Later, Linus Pauling used the pair bonding ideas of Lewis together with Heitler–London theory to develop two other key concepts in VB theory: resonance (1928) and orbital hybridization (1930). Beyond the home.

Relationships to Other Abstractions

Local relationship map for Valence Bond TheoryParents appear above the current abstraction, mutual partners to the right, and children below. Node labels state whether each abstraction is prime or domain-specific; colors identify relation types.Valence Bond TheoryDOMAINPrime abstraction: Theory — is a kind ofTheoryPRIMEDomain-specific abstraction: Generalized valence bond — presupposesGeneralizedvalence bondDOMAIN

Current abstraction Valence Bond Theory Domain-specific

Parents (1) — more general patterns this builds on

  • Valence Bond Theory is a kind of Theory Prime

    Valence Bond Theory is a strict kind of Theory: its frozen identity entails the parent's defining structure while adding domain-specific restrictions.

Children (1) — more specific cases that build on this

  • Generalized valence bond Domain-specific presupposes Valence Bond Theory

    Generalized valence bond presupposes Valence Bond Theory: the parent's defining role is necessary to the child's frozen mechanism or criterion.

Hierarchy paths (2) — routes to 2 parentless roots

Neighborhood in Abstraction Space

Valence Bond Theory sits in a moderately populated region (59th percentile for distinctiveness): it has near-neighbors but no dense thicket of look-alikes.

Family — Chemical Structure & Reactivity Concepts (22 abstractions)

Nearest neighbors

Computed from structural-signature embeddings · 2026-10-08