Predict the splitting patterns (singlet, doublet, doublet of doublets, etc.) of the following labeled hydrogen signals. a, a) Doublet b) Pentet c) Doublet C
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- Draw the alkene that would react with the reagent given to account for the product formed. ? + + H₂O **** H₂S04 • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • In cases where there is more than one answer, just draw one. CH3 CH3 CHCCH3 | | OH CH3 +1- Common molecular moieties have easily distinguishable patterns in NMR spectra. Match the Tollowing hydrocarbons with the generalized spectra shown below. Label each splitting pattem as a singlet, doublet, triplet, or quartet. a. X,CH-CHY, b. X,CH-CH,Y с. ХCH-CH,Y d. XCH,CH, 4.0 3.5 3.0 2.5 2.0 1.5 2.0 1.5 1.0 0.5 0.0 5.5 5.0 4.5 4.0 6.0 5.5 5.0 4.5 4.0 Peak bDraw the alkene that would react with the reagent given to account for the product formed. CH3 HCI CH3 CHCCH, ? + Či CH3 You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • In cases where there is more than one answer, just draw one.
- A benzene ring alters the reactivity of a neighboring group in the so-called “benzylic” position, similarly to how a double bond alters the reactivity of groups in the “allylic” position. Benzylic cations, anions, and radicals are all more stable than simple alkyl intermediates. a) Use resonance structures to show the delocalization of the positive charge, negative charge, and unpaired electron of the benzyl cation, anion, and radical.-What of the following statements is false about cyclopentadienyl anion? A) It is aromatic B) It has 5 p molecular orbitals C) It has three full p bonding molecular orbitals D) It has one empty p anti-bonding molecular orbital E) It has two empty p anti-bonding molecular orbital 6. What is the correct IUPAC name of the following compound? A) 1-bromo-3-chloro-5-isobutyl-4-methylbenzene B) 5-bromo-1-chloro-3-sec-propyl-2-methylbenzene C) 5-bromo-1-sec-butyl-3-chloro-2-methylbenzene Br D) 1-bromo-3-sec-butyl-5-chloro-4-methylbenzene E) 5-bromo-1-chloro-3-isobutyl-2-methylbenzene II. Draw the structure for the major organic product of each of the following reaction: 7. CN + -> NC Show strerochemistry if necessary HBr 8. (1 equivalent) (45°C) Show strerochemistnuDraw the structure for an alkene that gives the following reaction product. 7 CH2l2, Zn/Cu Ignore alkene stereochemistry. • You do not have to explicitly draw H atoms. • In cases where there is more than one answer, just draw one. / [F ?
- Be sure to answer all parts. Name the following compound according to substitutive IUPAC nomenclature. OH (select) (select) (select) (select) 7 of 11 Next> < Prev C F5 PrtSc F6 F4 F7 F10 F8 F9 F3 F11 F12 & # 4 3 7 9 0 CO LO ASTDraw a structural formula for the product formed upon hydroboration/oxidation of the alkene below. CH3CH2 CH3CH2 =CH₂ • Use wedge and hash bonds ONLY for rings. • Do not show stereochemistry in other cases. • If the reaction produces a racemic mixture, just draw one stereoisomer. MILL Y ChemDoodleⓇWhich of the following compounds would react most vigorously with liquid bromine when no light is present? A) cyclohexane B) Hexane C) benzene D) hex-2-ene
- Explain why heats of hydrogenation cannot be used to determine the relative stability of 2-methylpent-2-ene and 3-methylpent-1-ene. A, B, and C, each subjected to hydrogenation. The number of rings and π bonds refers to the reactant (A, B, or C) prior to hydrogenation.Draw the structure for an alkene that gives the following reaction product. CH3 HCI CH3CHCH2CHCH3 CI • Ignore alkene stereochemistry. •You do not have to explicitly draw H atoms. • In cases where there is more than one answer, just draw one. P. opy aste ChemDoodle"2. Draw the 1,2-addition and the 1,4-addition products for each of the following reactions. Label the major and minor product for each reaction. Reagents/Conditions 1,3-butadiene 1,3-butadiene 2,4-hexadiene 1,3-hexadiene 1,3-pentadiene 1,3-cyclopentadiene 1,3-cyclohexadiene REACTIONS OF DIENES 2,4-octadiene HBr -80 °C HBr 40 °C HI -80° C HI 40 °C Br₂ 40 °C Br2/H₂O 60 °C Br₂ -20° C Br2/H₂O 60 °C 1,2-addition (kinetic) 1,4-addition (thermodynamic)