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Electron counting

In chemistry, electron counting is a formalism for assigning a number of valence electrons to individual atoms in a molecule. It is used for classifying compounds and for explaining or predicting their electronic structure and bonding. Many rules in chemistry rely on electron-counting:

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Examples

H2OCH4H2SSCl2SF6
15 related topics

Counting rules

Covalent bondsMalcolm GreenLigandIonic bondsD electron count
11 related topics

Overview

ChemistryValence electronsBondingOctet ruleLewis structures
23 related topics

Electrons donated by common fragments

NOSulfur dioxide
2 related topics

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Overview

Counting rules

Electrons donated by common fragments

Examples

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Electron counting

Nodes56
Edges55
Triples27
Avg. degree1.96
Density0.035714
Components1

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Electron counting

Top relations

related to "Special cases" · 5
Electron counting → An, Another, NO, The, When
related to Counting rules · 5
Electron counting → Both, It, Malcolm Green, The, Two
is a · 2
Electron counting → formalism for assigning a number of valence electrons to individual atoms in a molecule, important tool for identifying the reactivity of molecules

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Important terminology

electron counting electrons two neutral ligand count atoms ionic one atom lewis bond added ligands rule method thus valence pair

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Electron countingis aformalism for assigning a number of valence electrons to individual atoms in a molecule0.90text
Electron countingis aimportant tool for identifying the reactivity of molecules0.90text
carboninstance ofespecially the lighter ones0.80text
nitrogeninstance ofespecially the lighter ones0.80text
and oxygeninstance ofespecially the lighter ones0.80text
18-electron rule in inorganic chemistryinstance ofespecially the lighter ones0.80text
organometallic chemistry of transition metalsinstance ofespecially the lighter ones0.80text
Hückel's rule for the π-electrons of aromatic compoundsinstance ofespecially the lighter ones0.80text
Polyhedral skeletal electron pair theory for polyhedral cluster compoundsinstance ofespecially the lighter ones0.80text
including transition metalsinstance ofespecially the lighter ones0.80text
main group elementsinstance ofespecially the lighter ones0.80text
mixtures thereofinstance ofespecially the lighter ones0.80text

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