formula, in chemistry: Structural Formulas

In many cases, especially with organic compounds, even the molecular formula does not provide enough information to identify a compound, so that structural formulas are needed. For example, both ethanol (ethyl alcohol) and dimethyl ether have the molecular formula C₂H₆O (see isomer). Their structural formulas are: CE5 In these formulas each line represents a single covalent chemical bond. A double bond is represented by a double line and a triple bond by a triple line. In ethene (ethylene), C₂H₄, the carbon atoms are joined by a double bond. The structural formula of ethene is: CE5 (In many representations of structural formulas, the angles of the lines indicating bonds do not necessarily have meaning.) In ethyne (acetylene), C₂H₂, the carbon atoms are joined by a triple bond. The structural formula of ethyne is: CE5

Sections in this article:

• Introduction
• Electron Dot Diagrams
• Semistructural Formulas
• Structural Formulas
• Molecular and Empirical Formulas
• Formulas for Compounds

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