University:
University of Virginia
Course:
CHEM 2410 | Organic Chemistry I
Academic year:

2024
Views:

186

Pages:

2
Author:

Kayli N.

919 lecture If lone pair in Resonance [ -N CHz· CH CHy combination of ~ Not true [ Go the real structure rotation but slow O H ] structures makes up , bond I resonance arrow I ↑ Sigma - adjacent 2 orbitals p ~ pyramidala God ↑ N e sp3 Trigonal O p-orbital, it can delocalize into - 2 different equilibrium arrow-compounds No of these structures one Resonance Delocalization of : more · compact adequately density electron = more stable and shows less (combination of all] correct one porbitals Parallel contiguous over reactives significant · Insignificant vs. Arrow pushing : indicating movement with arrows electron where electrons are where electrons - chooks I · ⑦ ↑ N = - CHz - AVOID = moved reverse Neutral ~ - only 2 charges allowedH3 & structures it has for resonance breaking sigma an octet an actet t of is No more than O 2 but only if in row on the p-orbitals] elements less electronegative element less than octet but less charges, w/ electronegativity exception 5N · b u/p-orbitals for a neutral of nitro Fo & Nitro Group: How electrons delucalize involves for 2nd electrons okay G and G only alreadyna compound [ble bonds (e & [ same out] :G Cadjacent and parallel p-orbitals 3 . Maintain NET charge ( [changes : CH , more resonance Never exceed ↳ Neutral Nti_Chz CH] ex. . 1 electron I - less than ex = Cradical ↳ charge I 3 RULES 2 . 1 nook 2 electrons Neutral ↳ more . = forward needs at least 1 - go vs charge groups every more nitro group more = Institutional isomers . : hasI resonance structurea resonances different molecules who delocalization In mind S 5 Patterns I, Pibond of between atoms different of (e . 2 Must be DIFFERENT Lone pair next (eH . 3 . Lone vinylic Pair/@ 2 electronegativity next Arrows H to eX . / Alylic 4 . next to · pibond electronegativity [h-cent (ex . Not carbon to => pi bond of then a i double bond Lion ] [Alylic contigous bonds in a cation] Pingelectrondensity toward ite eage St X- Noz ring [ [I] · deloclied eX on N ↳] · O: Patterns : :AvicAninbonds · Ring · b/ Oxygen is most electronegative = arrow Anion) (* ] it z lone pair can be used to form # . 5 - * Do rules w/1 &] (Allylic , ) carbon] charge OE < , · electronegativity positive to a 1 Arrow ex less X less * electronegativity Arrow : G 1 ex ↳ Resonance arrow 15 rules *