Predict the major products (including stereochemistry) when cis-3-methylcyclohexanol reacts with the following reagents. (a) concentrated HBr (b) TsCl/pyridine, then NaBr

Give the product(s) formed when 1-butene reacts with the following:     (a)  HBr     (b)  dilute H2SO4     (c)  Br2 in CCl4     (d)  Br2 in H2O

3-Chloro-2-methylpropene reacts with sodium methoxide in methanol to form 3-methoxy-2-methylpropene.  For each of the following changes in the reaction conditions, state whether the reaction rate would increase, decrease, or remain the same. Explain your reasoning. In some cases the identity of the major organic product would be expected to change; in such cases, give the expected major product.  (a) dimethyl sulfoxide (DMSO) is used in place of methanol (b) methanol is used by itself without sodium methoxide (c) 1-chloro-2,2,-dimethylpropane is used in place of 3-chloro-2-methylpropene

Draw structural formulas for these compounds. (a) 1-Bromo-2-chloro-4-ethylbenzene (b) 4-Bromo-1,2-dimethylbenzene (c) 2,4,6-Trinitrotoluene (d) 4-Phenyl-1-pentene (e) p-Cresol (f) 2,4-Dichlorophenol

6) Which is the organic product for the following reaction? (a) (b) (c) (d) LOH OH COOH OH OH COOH COOH KMnO4 H₂O (e) None of the above products will be formed

and (ii) KMnO4 in aqueous NaOH: 1. Name the following alkenes, and predict the products of their reaction with (i) KMnO4 in aqueous acid (a) (b) 2. Draw structures corresponding to the following IUPAC names: (a) 3-Ethylhept-1-yne (b) 3,5-Dimethylhex-4-en-1-yne (c) Hepta-1,5-diyne (d) 1-Methylcyclopenta-1,3-diene (1) 3. Draw and name all the possible pentyne isomers, C5H8. H H Ç-H [ Pent-1-yne] (2) 4. Predict the products of the following ring is inert to all the indicated reagents.) 4 H 4- (3) 4-C C = C-4 [3-methylbut -1-4 [Pent-2-yhdioselectivity where relevant. (The aromatic CH=CH2 Styrene (a) Styrene+H2 Pd, ? (c) Styrene+HBr ? (b) Styrene+Br2 → ? (d) Styrene+KMnO4 NaOH, H2O ? 5. Suggest structures for alkenes that give the following reaction products. There may be more than one answer for some cases. HyPd catalyst (a) ? Br₂ in CH2Cl2 (b) ? HBr (c) ? 2-Methylhexane 2,3-Dibromo-5-methylhexane 2-Bromo-3-methylheptane CH3 HO OH CH3CHCH2CHCHCH2CH3 KMnO4OH (d) ? H₂O

Compounds B and C are hydrocarbons with the structural formulae as shown below. CH, „CH, в (a) Name compounds B and C according to the IUPAC nomenclature. (b) Both B and C can undergo oxidation reaction with the same oxidizing agent. Write chemical equations involved and explain the differences between these two reactions. (c) Name one reaction that converts B to methylcyclohexane.

Biphenyl has the following structure.(a) Is biphenyl a (fused) polynuclear aromatic hydrocarbon?(b) How many pi electrons are there in the two aromatic rings of biphenyl? How does this number compare with that for naphthalene?(c) The heat of hydrogenation for biphenyl is about 418 kJ>mol (100 kcal>mol). Calculate theresonance energy of biphenyl.(d) Compare the resonance energy of biphenyl with that of naphthalene and with that of two benzene rings. Explain thedifference in the resonance energies of naphthalene and biphenyl.

provide the structure of the intermediate and product for the following reaction : (c) H CH,OH/H (C)