Question 7 Propose a chemical structure for the name below. Make sure to clearly define the stereochemistry where applicable: (2E, 4Z, 6Z, 8E)-deca-2,4,6,8-tetraene A B C D A B C D
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- Question 9 Propose a chemical structure for the name below. Make sure to clearly define the stereochemistry where applicable: (E)-3,7-dimethyl-2,6-octadien-1-ol A B C D A B OH C D OH .OH OH11 Draw a structure for cis-2,3-dimethyloxirane. • Show stereochemistry only if given in the name. • In cases where there is more than one answer, just draw one. opy aste - [FPlease don't provide handwritten solution ......
- SAIC Pr7.1 The compound Na,lrCl, reacts with triphenylphosphine in diethyleneglycol in an atmosphere of CO to give trans-[IrCI(CO)(PPH3)2], known as 'Vaska's compound'. Excess Co gives a five coordinated species and treatment with NaBH in ethanol gives [IrH(CO)2 (PPH3)2]. Derive a formal name for 'Vaska's compound'. Draw and name all isomers of the two five-coordinate complexes.A chemist allows some pure (2S,3R)-3-bromo-2,3-diphenylpentane to react with a solution of sodium ethoxide(NaOCH2CH3) in ethanol. The products are two alkenes: A (cis-trans mixture) and B, a single pure isomer. Under thesame conditions, the reaction of (2S,3S)-3-bromo-2,3-diphenylpentane gives two alkenes, A (cis-trans mixture) and C.Upon catalytic hydrogenation, all three of these alkenes (A, B, and C) give 2,3-diphenylpentane. Determine the structuresof A, B, and C; give equations for their formation; and explain the stereospecificity of these reactions9. Plan syntheses of the following compounds. You may use the given starting material and any compound containing three or fewer carbons. (a) OH (b) Br Br- (c) ✓ -OTS (d) OH
- Cyclopentene reacts with reacts with ozone in dichloromethane at -78° C. Treatment of the resulting ozonide with zinc in acetic acid or with dimethylsulfide gives A(C5H8O₂). Treatment of A with sodium borohydride in ethanol gives B(C5H12O2). Draw the structure of B. • You do not have to consider stereochemistry. My 3 0 + Sn [F ChemDoodleⓇ qa2. Show the mechanism with arrow formalism to show the formation of the most stable product. Which of the following terms apply to the mechanism(s) i) Regioselectivity (ii)stereoselectivity (iii)stereospecificity. Explain H+ (aq) from sulfuric acid NaCN most stable product15) Ignoring stereochemistry, the 1:1 reaction of chlorine with 1,3-cyclohexadiene at 25°C in the dark and in the absence of peroxide forms which of these? C1 C1 C1 6 & 60 C1 I II III IV C1 C1