noun
unsaturated bond
Technical term in chemistry referring to a chemical bond with double or triple bonds, such as in alkenes or alkynes.
不飽和結合を持つ化合物は付加反応を起こしやすい。
Compounds with unsaturated bonds tend to undergo addition reactions.
飽和結合 (saturated bond) refers to a single bond without double or triple bonds, the opposite of 不飽和結合.
Compound of 不 (fu, 'not') + 飽和 (hōwa, 'saturation') + 結合 (ketsugō, 'bond'). A straightforward technical term formed from Sino-Japanese elements.