Phosphorus Triiodide: Why *Is* It Pyramidal?! 🤔
Phosphorus triiodide (PI3), a relatively unstable red solid, presents a fascinating case study in molecular geometry. The Valence Shell Electron Pair Repulsion (VSEPR) theory provides a predictive framework, yet understanding the subtle interplay of electron repulsion and atomic size is crucial to explaining why is phosphorus triiodide pyramidal. Computational chemistry software, such as Gaussian, offers […]