15.15 Draw the structure or give the name of each compound: (a) 2,3-dimethyloctane (b) 1-ethyl-3-methylcyclohexane CH3 (с) CH;—СН,——сH—CH—СH (d) CH3 ČH2-CH3 15.16 Draw the structure or give the name of each compound: (a) (b) НаС. CH3 CH3 (c) 1,2-diethylcyclopentane (d) 2,4,5-trimethylnonane
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- Eleostearic acid, C18H30O2, is a rare fatty acid found in the tung oil used for finishing furniture. On ozonolysis followed by treatment with zinc, eleostearic acid furnishes one part pentanal, two parts glyoxal (OHC-CHO), and one part 9-oxononanoic acid [OHC(CH2)7CO2H]. What is the structure of eleostearic acid?Draw five isomers with the formula C8H18. 2. Draw the two chair conformations of menthol and identify the more stable conformation. 3. The pKa,1 and pKa,2 of ortho and para isomers of phthalic acid (diprotic acid) are shown below: Provide an explanation on the differences of their pKa values.(a) Draw a skeletal structure of the anabolic steroid methenolone from the following description. Methenolone contains the tetracyclic steroid skeleton with a carbonyl group at C3, a hydroxyl at C17, a double bond between C1 and C2, and methyl groups bonded to C1, C10, and C13. (b) Add wedges and dashed wedges for all stereogenic centers with thefollowing information: the configuration at C10 is R, the configuration at C13 is S, the configuration at C17 is S, and all substituents at ring fusions are trans to each other. (c) Draw the structure of Primobolan, the product formed when methenolone is treated with CH3(CH2)5COCl and pyridine. Primobolan is an anabolic steroid that can be taken orally or by injection and has been used illegally by well-known Major League Baseball players.
- What is the degree of unsaturation for C6H8? Draw two possible structures.Betamethasone is a synthetic anti-inflammatory steroid used as a topical cream for itching. Betamethasone is derived from cortisol, with the following structural additions: a C=C between C1 and C2, a fluorine at C9, and a methyl group at C16. The configuration at C9 is R, and the configuration at C16 is S. Draw the structure of betamethasone.Draw and name each of the following: a. An ether with molecular formula C3H8O b. An alkene with the formula C5H10 that has stereoisomers. c. A tertiary (30) alcohol with molecular formula C5H11OH that is chiral. d. A primary (10) aliphatic amine with molecular formula C3H9 e. A thiol with molecular formula C6H14
- Compound X and compound Y are constitutional isomers with the molecular formula C5H10. Compound X possesses a carbon-carbon double bond in the trans configuration, while compound Y possesses a carbon-carbon double bond that is not stereoisomeric:2,3-Dimethylfumaric acid has a molecular formula C6H8O4. It undergoes oxidativecleavage to form two identical compound N. Compound N is then reacted withethylmagnesium bromide to form compound O. Compound O is then hydrolysed inacidic condition to form compound P. Draw the structure of compound N, O and P. PLEASE PROVIDE CLEAR HANDWRITING, and explantionBrainberene, a compound isolated from an organic chemist’s brain, has the molecular formula C16 H26. When Brainberene is subjected to catalytic hydrogenation using an excess of hydrogen, 1 mol of Brainberene absorbs 3 mol of hydrogen and produces B: C16 H32. 1) What is the element of unsatuation (IHD) of Brainberene? 2) How many double bonds and rings do Brainberene has? Laboratory experiments revealed that Brainberene has no triple bonds. 3) What is the IHD of B? d) How many double bonds and rings does B has? 12
- Treatment of cyclohexene with C6H5CHI2 and Zn(Cu) forms two stereoisomers of molecular formula C13H16. Draw their structures and explain why two compounds are formed.If a chiral carbon has the following substituents: -OH, -NH2, -COOH, and -OCH3 arrange them in order of prioritization (highest priority to lowest priority)? a -OCH3 > -OH > -NH2 > -COOH b -OCH3 > -NH2 > - OH > -COOH c -OH > - OCH3 > -NH2 > -COOH d -COOH > -NH2 > -OH > -OCH3Compound X, C8H17Cl, is a chiral product of the radical chlorination of 4-methylheptane.X reacts in SN2 fashion with NaI in acetone to form Z, C8H17I. When the reactant is the R-enantiomer of X, only the R-enantiomer of Z is formed.Draw a structural formula for X; do not show stereochemistry.