kaksiksidemeid
Kaksiksidemeid, meaning "double bonds" in Estonian, refers to a covalent chemical bond between two atoms involving four shared electrons. This is in contrast to a single bond, which involves two shared electrons. Double bonds are typically stronger and shorter than single bonds between the same two atoms. For example, the carbon-carbon double bond in ethene (C2H4) is stronger and shorter than the carbon-carbon single bond in ethane (C2H6).
The presence of double bonds significantly influences the chemical and physical properties of molecules. They are
In contrast, alkynes contain a triple bond, which consists of one sigma bond and two pi bonds.