https://doi.org/10.1351/goldbook.B00699
The @E02141@ (per @M03980@) required to break a given bond of some specific molecular entity by homolysis, e.g. for B00699.png, symbolized as \(D\left(\text{CH}_{3}\,-\text{H}\right)\) (cf. heterolytic @B00698@ energy).
See also:
bond energy