Chemistry - CHEMICAL BONDING Question with Solution | TestHub

The species that can form coordinate bonds with two F⁻ ions are those with vacant orbitals capable of expanding their octet or completing it. BeF₂ (Option A): Beryllium has two vacant p-orbitals, allowing it to accept two F⁻ pairs to form $[Be{F}_4]$²⁻. SiF₄ (Option D): Silicon has vacant d-orbitals, enabling it to expand its coordination number from 4 to 6, forming $[Si{F}_6]$²⁻. BF₃ and CF₄: Boron only has one vacant orbital (forming $[B{F}_4]$⁻), and Carbon has no vacant orbitals to accept additional electrons.