CHEM 1021 Lecture Notes - Lecture 40: Nitrite, Trigonal Planar Molecular Geometry, Trigonal Pyramidal Molecular Geometry
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Neither structure is actually correct but can be drawn to represent a structure which is hybrid of the two. Resonance structures have the same relative atom placement but a difference in the locations of bonding and nonbonding electron pairs. Is used to indicate that resonance is observed. Clicker 1: which of the following molecules or ions could possibly exhibit resonance: c2h2, br2, co3^2, sih4. No # valance electrons: 5 + 6 = 11. No2 # valance electrons: 5 + 12 = 17: expanded valance shells, central atom has more than 8 electrons. Using the information in a lewis symbol. Start with correct lewis symbol/structure: apply vespr theory to get geometry. It is an important factor in determining physical and chemical properties of substances. Central concept: ele(cid:272)tro(cid:374) (cid:862)group(cid:863) adopt a(cid:374) arra(cid:374)ge(cid:373)e(cid:374)t i(cid:374) spa(cid:272)e a(cid:271)out a (cid:272)e(cid:374)tral ato(cid:373) that (cid:373)i(cid:374)i(cid:373)izes the repulsio(cid:374)s a(cid:373)o(cid:374)g the (cid:374)egati(cid:448)e ele(cid:272)tro(cid:374) (cid:862)groups(cid:863) (cid:862)groups(cid:863) of ele(cid:272)tro(cid:374)s: Ele(cid:272)tro(cid:374) (cid:862)groups(cid:863) (cid:373)ust (cid:271)e as far fro(cid:373) ea(cid:272)h other as possi(cid:271)le.
