Introduction:
Triple bonds consist of one sigma bond and two pi bonds, while double bonds have one sigma bond and one pi bond. Due to their higher electron density and smaller bond length, triple bonds are generally more reactive than double bonds. However, in some cases, triple bonds can be less reactive to electrophilic attack compared to double bonds despite their higher electronegativity.

Electronegativity and Reactivity:
Electronegativity is a measure of an atom's ability to attract electrons towards itself in a chemical bond. Since triple bonds contain more pi electrons, which are closer to the positively charged nuclei, we might expect triple bonds to be more reactive. However, the higher electronegativity of triple bonds can actually decrease their reactivity towards electrophilic attack. This can be explained by the following factors:

1. Electron Density:
Triple bonds have higher electron density between the bonded atoms due to the presence of two pi bonds. This increased electron density makes it more difficult for electrophiles to approach and attack the triple bond, reducing its reactivity.

2. Steric Hindrance:
The presence of two pi bonds in a triple bond also introduces steric hindrance. The pi electrons and the bulky pi orbitals associated with the triple bond can create a spatial hindrance for electrophiles, making it more difficult for them to approach and react with the triple bond.

3. Resonance Stability:
Triple bonds often exhibit greater resonance stability due to the presence of more pi bonds. This stability can make it more difficult for electrophiles to disrupt the pi electron system and react with the triple bond.

4. Polarity and Charge Distribution:
The higher electronegativity of triple bonds can result in a greater charge separation between the bonded atoms. This charge distribution can reduce the electrophilic character of the triple bond, making it less susceptible to attack by electrophiles.

Conclusion:
In summary, although triple bonds have higher electronegativity and electron density, they can be less reactive to electrophilic attack compared to double bonds. Factors such as electron density, steric hindrance, resonance stability, and charge distribution contribute to this decreased reactivity. It is important to consider these factors when predicting the reactivity of triple bonds in different chemical reactions.