And because this has much more S character than this, the electrons here are more stable. And therefore, this compound is more stable than this anion. And that means this reaction will be more likely to take place. Recall that electrons found closer to our proton, to our nucleus are more stable. They're lower in energy. And that's exactly why when electrons are found in the s orbital, they're more stable than if they're found in the p orbital, because the S orbital is closer to the nucleus than the p orbital.