Chapter 6 The polyatomic molecules

Generalized 8 - N rulePearson (1964), Hulliger & Mooser (1965)8 - VEC A = AA - CC / (n/m) for C m A nVEC A : Number of valence electrons par anionVEC A < 8, AA>0, CC=0 Polyanionic val. comp.VEC A = 8, AA=0, CC=0 Normal valence compoundVEC A > 8, AA=0, CC>0 Polycationic val. comp.AA: Average number of A-A bonds per anionCC; Average number of C-C bonds per cations and/orelectrons used for inert-electron pairs on cations