Based on the relative electronegativities of carbon atoms with different hybridizations, which of th — Hydrocarbons Chemistry Question

💡 Solution & Explanation

The dipole moment of an alkyne is greater than that of an analogous alkene because the $sp$ hybridized carbon in the triple bond has more s-character (50%) and is therefore more electronegative than an $sp^2$ or $sp^3$ carbon. This polarizes the $sp-sp^3$ carbon-carbon bond. But-1-yne has a net dipole moment ($\approx 0.8$ D) higher than but-1-ene ($\approx 0.3$ D), whereas the symmetrical but-2-yne has a zero dipole moment.