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- Which of the following statements about an -NH2 group is FALSE? a. meta director b. activator towards EAS c. increases electron density on the aromatic ring d. stabilizes positively charged intermediates by resonance or inductive effectsWhich of the following are consistent with the requirements for aromaticity?I. A system with delocalized p electrons in a ring.II. 4n p electrons in the ring.III. All the ring atoms must be carbons.IV. (4n + 2) p electrons in the ring. Give the answer why.The compound MON-0585 is a non-toxic, biodegradable larvicide that is highly selective against mosquito larvae. Synthesize MON-0585 using either benzene or phenol as a source of the aromatic rings.
- Which is the stronger base: N-methylaniline (C6H5NHCH3) or benzylamine (C6H5CH2NH2). Explain your reasoning, supporting it with appropriate resonance contributors.Which organic compound will yield the following result: phenol, propanoic acid, or propanal? Why?1) How will you describe whether any compound has been oxidized or reduced? Support the answer with suitable examples. 2)Why carboxylic acid with a carbonyl group at 3rd position can be decarboxylated? 3) Explain why electrophilic aromatic substitution in Pyrrole takes place at C-2 positions whereas, in Pyridine it takes place at C-3 position? 4) List the following esters in order of decreasing reactivities towards hydrolysis with reason: Methyl benzoate, p-cyano methyl benzoate and p-hydroxy methyl benzoate 5)LDA is the base of choice for carbonyl compound to completely convert into enolate. Why?
- γ-Butyrolactone (C4H6O2, GBL) is a biologically inactive compound that is converted to the biologically active recreational drug GHB (Section 19.5) by a lactonase enzyme in the body. Since γ-butyrolactone is more fat soluble than GHB, it is more readily absorbed by tissues and thus produces a faster onset of physiological symptoms. γ-Butyrolactone shows an absorption in its IR spectrum at 1770 cm−1 and the following 1H NMR spectral data: 2.28 (multiplet, 2 H), 2.48 (triplet, 2 H), and 4.35 (triplet, 2 H) ppm. What is the structure of γ-butyrolactone?Why a nitro group (NO2) directs electrophilic aromatic substitution tothe meta position ?The following three derivatives of succinimide are anticonvulsants that have found use in the treatment of epilepsy, particularly petit mal seizures. Q. Of these three anticonvulsants, one is considerably more acidic than the other two. Which is the most acidic compound? Estimate its pKa and account for its acidity. How does its acidity compare with that of phenol? with that of acetic acid?
- Borazole, B3N3H6, is an unusually stable cyclic compound. Propose a structure forborazole, and explain why it is aromatic.A compound with molecular formula C5H10O2 gives the following IR spectrum. When it undergoes acid-catalyzed hydrolysis, the compound with the 1H NMR spectrum shown below is formed. Identify the compounds.Based on the following H NMR and IR spectrums, what is the structure of C7H6N2?