8 Mnemonics for OC-02

Mnemonic 1: Butane Conformational Stability Order "A Gentle Evening Falls" = Anti > Gauche > Eclipsed > Fully eclipsed (Most stable → Least stable)

Mnemonic 2: Anti-Markovnikov — Which HX? "Peroxide = Anti. Only HBr works. HCl is too lazy (Cl• can't add — endothermic). HI is too crazy (premature chain termination)."

Mnemonic 3: Lindlar vs Na/$NH_{3}$ "Lindlar = cis (Lindlar for your sister — same side = same face) Na/$NH_{3}$ = trans (N for opposite — Not the same side)"

Mnemonic 4: s-Character and Acidity "More s = More acidic $sp^{3}$ (25%) → Least acid. $sp^{2}$ (33%) → Middle. sp (50%) → Most acid. 50-33-25: Fifty is fifty best (alkyne best)"

Mnemonic 5: Free Radical Halogen Reactivity vs Selectivity "Reactive goes up (F > Cl > Br > I), Selective goes down F = Fastest but Foolish (no selectivity) Br = Best (selective, practical)"

Mnemonic 6: 3 Steps of Radical Halogenation "I-P-T: Initiation → Propagation → Termination (Imagine People Talking in a chain)"

Mnemonic 7: Ozonolysis Product Rule "Each C of C=C gets an oxygen (=O): If C has H → aldehyde (–CHO) If C has no H → ketone (–CO–) 'H = aldehyde; No H = ketone'"

Mnemonic 8: Dihedral Angles — Butane "Anti = A = 180° (A is the largest letter, highest angle) Gauche = 60° (G = 6, starts with 6) Eclipsed = 120° (E = middle) Fully eclipsed = 0° (F = Floor = zero)"