CHEM 205 Lecture Notes - Lecture 3: Dimethyl Sulfide, Lewis Acids And Bases, Atomic Orbital
Document Summary
The oxidation state of n in nh4+ is: 4 (bond polarization) + 1 (formal charge) = 3. The electronic configuration of n in this molecule resembles that of neon. Ability of heteroatoms possessing unshared pairs to establish bonds by donating an electron pair to an appropriate species capable of accepting that electron pair. Principle: an atom / molecule can function as an acceptor of electron pairs only if it possesses a vacant orbital that can accommodate an incoming electron pair. Example of a molecule that can function as an acceptor of electron pairs: bh3 (borane) vacant, atomic p-type orbital on the b atom. H the b atom has an incomplete octet: it can accept 2 additional electrons in a vacant, p-type. H atomic orbital to acquire a noble gas-like electronic con guration. Predictable (and experimentally verifiable) reaction between, e. g. , dimethyl sulfide and bh3: vacant p-type orbital. Important: notice the formal charges on s and b.
