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- A hydrocarbon of unknown structure has the formula C8H10. On catalytic hydrogenation over the Lindlar catalyst, 1 equivalent of Η2 is absorbed. On hydrogenation overa palladium catalyst, 3 equivalents of Η2 are absorbed. (a) How many degrees of unsaturation are present in the unknown structure? (b) How many triple bonds are Present? (c) How many double bonds are present? (d) How many rings are present? (e) Draw a structure that fits the data.Plastic photochromic sunglasses are based on the following reversible rearrangement of a dye inside the lenses that occurs when the lenses are exposed to sunlight. The original dye absorbs UV light but not visible light and is thus colorless, while the rearrangement product absorbs visible light and is thus darkened. (a) Show the mechanism of the rearrangement. (b) Why does the rearrangement product absorb at a longer wavelength (visible light) than the original dye (UV)?can you help with quesiton 12
- 1) quv LDA Endicate the product in bex and indicate whech is the thermady namil or Kinetic produet CampandE 11 qur LDA D 2) H3C. CH3CH20H Kinetic or thermadynumc 31 HyoT Protonutish kinetre or thermobyhamil 31H3What is the reaction? cycloaddition B HPh R-8 ∙C- & CO₂Me CO₂Me CO₂Me CO₂Me HPh D [Single selection] A B C D OHProVide the maJor Product for cach of the following reactiuns H more Than one 5 formed, Circk the product major Product 2. NBS, hy 1- Bra, FeBr3 2. H2504 -S03H T.Bra, FeBr3 Mg co) 3 CH2O 4. H307 workup (0) 2.
- What is the organic product formed in the following sequence of reactions? Br (1) Mg/ether, (2) CO₂ HOCH₂/H* (1) DIBAL-H, toluene, -78°C heat (2) H*(aq) (3) H*(aq) II H III IV de "a H H I ?FCompound 10 is a low-boiling liquid (boiling point 58 "C), that reacts with Br, in CCI, to form a 1,1,2,2-tetra bromide The Mass, RÄCÍTICAL SPECTROSCOPY FCompound 10 is a low-boiling liquid (boiling point 58 "C) that reacts with Br. in CCI, to form a 1,1,2,2-tetra bromiide The R, and 'H NMR spectra, along with "C NMR data ve aiven below Flemental Analysis:C. 48 36. H. 4.06; contains halogen. Mass Spectrum 39 74 50 60 140 150 160 170 180 190 200 30 40 70 80 90 100 110 120 130 mve Infrared Spectrum Wave Number, cm 1 4000 1000 2500 2000 1500 1300 1200 15D0 0 10c0 900 B00 700 15 12 13 14 15 Wavelength, microns " Η NMR ppm. 5 Structurei "C Spectral Data: doublet, 80.4 ppm singlet, 68.3 ppm triplet, 347 ppin 50.0m ude 02000 Brooks/Cole Publishing Company Absorbance♡ EY plais of ahe prondug shown over the alternaaive prondct the basis er The Selectiv formation 179 H. HO H. for PROBLEMS LIAIH, rather than CH3 CH3 CH3 H H нн CH rather than the stereoisomeric CH3 sulfoxide N CH3 RCO;H CH3 CO,CH3 Co,CH3 ch (f) CH;CCH2 rather than or HO- CH CCH-CHCH CCH, CH;C CH3 CH3 CH CH;CCH, CH (g) CH,CH2 SnCla rather than CH2OH
- Draw a structural formula for the intermediate in the following reaction BM 2 Rebry Ex Group CH-C₂ . You do not have to consider stereochemistry. You do not have to explicitly draw H otoms. Do not include counter-ons, e.g. Na, I, in your answer. @98 00./11 | amtsengle reten34. Draw the major organic product(s) for the following reactions; (*) must include correct stereochemistry; double-dagger (+) must show two products. HBr (a)* Br HBr Br (b) + (1.00 equiv.) Br Br HBr (c)* HCI (d) 48% wt. HBr 37% wt. HCI HEAT OH [H2SO]/ H20 (g) OCH3 [H2SO,]/A CH,OH (excess) (h) [H,SO,1/H20 OH (i)* [H2SO,] / H,0 OH 13Dtermine the reagents that can accomplish the rxn CH2OH (1) Reagent ? (2) Reagent ? C9H1202 (4) Reagent ? (3) H+ a. (1) SOC12 (2) 1-propanol; (4) PCC/pyridine b. (1) NaH, (2) acetone, (4) NABH4 c. (1) NaH, (2) epoxide (4) PCC/pyridine d. (1) Jones reagent, (2) NaH, (4) epoxide