Dreifachbindendes

Dreifachbindendes is a German adjectival form used to describe atoms, groups or molecules that participate in a triple bond. The root concept, Dreifachbindung (triple bond), refers in chemistry to a covalent linkage composed of one sigma and two pi bonds between two atoms. Dreifachbindendes appears as an inflected form in attributive position (for example, dreifachbindendes Kohlenstoffatom) and agrees with the gender, number and case of the noun it modifies.

In chemical contexts, triple bonds are most commonly encountered in alkynes (carbon–carbon triple bonds), nitriles (carbon–nitrogen triple bonds) and diatomic nitrogen (N≡N). Triple-bonded centers are characterized by shorter bond lengths and generally higher bond dissociation energies than corresponding single or double bonds, and they impose linear geometry on the bonded atoms. These features affect reactivity: triple bonds undergo characteristic addition reactions, can serve as ligands in coordination chemistry, and require specialized catalysts for selective cleavage or transformation.

Spectroscopic signatures of triple bonds include distinct stretching frequencies in infrared and Raman spectra; terminal alkynes also show C–H stretching near characteristic higher wavenumbers. In language use, dreifachbindendes is one of several related forms (dreifachbindend, dreifachgebunden) and is used in scientific texts to specify that a particular site or substituent is engaged in a triple bond.