KnowraSingle bondSingle bondA covalent bond in which two atoms share one pair of electrons. It is the simplest covalent bond between two atoms.BriefConnectCovalent bond: A chemical bond formed when atoms share electron pairs. A single bond is the one-pair case of covalent bonding.Valence electron: An electron in an atom's outer shell that can participate in chemical bonding. The shared pair in a single bond comes from the atoms' valence electrons.Ethane: A two-carbon alkane with the formula C₂H₆ and a carbon–carbon single bond. Its central carbon–carbon bond is a simple example of a single bond.Double bond: A covalent bond in which two atoms share two pairs of electrons. It has one more shared electron pair and generally restricts rotation more than a single bond.Sigma bond: A covalent bond formed by electron density concentrated along the axis between two nuclei. Most single bonds consist of one sigma bond.Lewis structure: A diagram showing valence electrons as bonds and lone pairs around atoms. A single bond appears as one line or one shared pair in this representation.Alkane: A saturated hydrocarbon containing only carbon–carbon single bonds. Alkanes are defined by their network of carbon–carbon single bonds.Triple bond: A covalent bond in which two atoms share three pairs of electrons. Its higher bond order distinguishes it from the one-pair single bond.Bond length: The equilibrium distance between the nuclei of two bonded atoms. The shared pair holds the bonded nuclei at a characteristic separation.Octet rule: The chemical guideline that many main-group atoms form bonds to attain eight valence-shell electrons. Counting a single bond toward each atom's shell helps explain common bonding patterns.Show all 21Linked from 7 pagesSaturated compoundBroader topic: Every carbon–carbon bond in a saturated framework is a single bond.Covalent radiusRelated: Tabulated covalent radii commonly describe distances in single bonds.Conformational isomerismNarrower topic: Rotation around a single bond is the usual source of conformational change.Staggered conformationRelated: Rotation around a carbon–carbon single bond generates ethane’s staggered arrangement.ConformationNarrower topic: Rotation around single bonds generates the shapes called conformations.Show all 7