(a)
Interpretation: The conversion of given ball-and-stick model of androsterone to a skeletal structure using wedges and dashed wedges around all stereogenic centers is to be stated.
Concept introduction: Steroids, a group of tetracyclic lipids composed of one five-membered ring and three six-membered rings. These rings are lettered by A, B, C, and D. Most of the steroids contain two angular methyl groups. These methyl groups are numbered as
(b)
Interpretation: The conversion of given ball-and-stick model of androsterone to a three dimensional representation using chair cyclohexane rings is to be stated.
Concept introduction: Steroids, a group of tetracyclic lipids composed of one five-membered ring and three six-membered rings. These rings are lettered by A, B, C, and D. Most of the steroids contain two angular methyl groups. These methyl groups are numbered as
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ORGANIC CHEMISTRY
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- 4 But-2-enal, CH₂CH=CHCHO, is a pale yellow, flammable liquid with an irritating odour. (a) But-2-enal exists as two stereoisomers. Draw skeletal formulae to show the structure of the two stereoisomers of but-2-enal. (b) (i) Describe a simple chemical test that would show that but-2-enal is an aldehyde. (ii) Explain why this test gives a different result with aldehydes than it does with keton (c) But-2-enal also reacts with sodium borohydride, NaBH4. (i) Identify the organic compound formed in this reaction. (ii) State the type of chemical reaction occurring. (d) Precautions must be taken to prevent but-2-enal catching fire. Construct a balanced equation for the complete combustion of but-2-enal, C₂HO.arrow_forwardPropylamine (bp 48°C), ethylmethylamine (bp 37°C), and trimethylamine (bp 3°C) are constitutional isomers with the molecular formula C3H9N. Account for the fact that trimethylamine has the lowest boiling point of the three and propylamine has the highest.arrow_forwarda) b) c) a) hexanal b) 02- butanonearrow_forward
- Explain the concept of chirality in organic chemistry, its significance in drug design, and the difference between enantiomers and diastereomers.arrow_forward2. Draw the following organic compounds. a) 1,1-diethylcyclobutane c) 2-hexoxynonane b) N-ethyl-3-ethylpentanamide d) 2,2-dimethylhexan-3-onearrow_forwardGive the common name for NN OH T CH3-CH₂-C-N-CH₂-CH3 Spell out the common name of the compound. Give the IUPAC name for 0 CH₂ || CH₂-C-N-CH₂-CH₂-CH₂, Spell out the IUPAC name of the compound. diethylamine Draw all missing reactants and/or products in the appropriate boxes by placing atoms on the canvas and connecting them with bonds. Add charges where needed. HE CONT HOarrow_forward
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