(a)
Interpretation:
The aromatic cyclopolyenes that are neutral are to be predicted.
Concept introduction:
A molecule must be cyclic, planar, completely conjugated and should follow Hückel’s rule to be classified as aromatic. According to the Hückel’s rule, the number of
(b)
Interpretation:
The aromatic cyclopolyenes that have single negative charge are to be predicted.
Concept introduction:
A molecule must be cyclic, planar, completely conjugated and should follow Hückel’s rule to be classified as aromatic. According to the Hückel’s rule, the number of
(c)
Interpretation:
The aromatic cyclopolyenes that have double negative charge are to be predicted.
Concept introduction:
A molecule must be cyclic, planar, completely conjugated and should follow Hückel’s rule to be classified as aromatic. According to the Hückel’s rule, the number of
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Physical Chemistry
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- (b) (1-chloromethyl)cyclopentane, C6H11CI reacts with aqueous sodium hydroxide, NaOH to produce a primary alcohol AA. When CsH11Cl is added with magnesium, Mg in ether, an organometallic compound BB is formed. When compound BB reacts with ethanal, CH3CHO, a secondary alcohol cC is formed. The molecular structure of C6H11CI is given below. (1-klorometil)siklopentana, C6H11CI bertindak balas dengan akues natrium hidroksida, NaOH bagi menghasilkan satu alkohol primer AA. Apabila C6H11CI ditambah dengan magnesium, Mg dalam eter, sebatian organologam BB terbentuk. Apabila sebatian BB bertindak balas dengan etanal, CH3CHO, satu alkohol sekunder CC dihasilkan. Struktur molekul bagi C6H11CI diberikan di bawah. (1-chloromethyl)cyclopentanearrow_forwardEvaluate each of the following processes applied to cyclooctatetraene, and decide whether the species formed is aromatic or not. (a) Addition of one more π electron, to give C8H8− (b) Addition of two more π electrons, to give C8H82− (c) Removal of one π electron, to give C8H8+ (d) Removal of two π electrons, to give C8H82+arrow_forwardWhich of the following structures are aromatic? CH2 I II II IV (a) I and II (b) III and IV (c) only I (d) І, II and IVarrow_forward
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- Which of the following molecules could be considered aromatic? Assume all of the compounds are planar. ^ N H₂ Cyclopentadiene is especially acidic for a hydrocarbon. Use a diagram to explain why.arrow_forwardWhich of the following is true for the reactions of alkyl halides? (a) The characteristic reactions of alkyl halides are oxidation and reduction.(b) The characteristic reactions of alkyl halides are elimination and substitutionc. The characteristic reactions of alkyl halides are addition and substitutiond. Characteristic reactions of alkyl halides are addition and elimination.arrow_forward(b) Draw the structural formula for each of the following compounds. (i) 2,2,3-trimethylpentan-3-ol(ii) 2-methyl-3-phenylbut-2-enal(iii) 5-chloro-2-methylheptan-3-olarrow_forward
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