Sonogashira reaction: Palladium catalyzed coupling of iodosubstituted aromatic compounds [Pavia, Exp. 35 p 289-298 (Introduction to microwave reactor!)]
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- Propylene forms only oligomer under normal free radical conditions, yet the monomer forms high-molecular-weight polymer if it is polymerized while trapped in the channels of a crystalline host substance such as urea or thiourea. Explain [G. Di Silvestro, P. Sozzani, and M. Farina, Polym. Preprints, 27(1), 92, 1986].a) Consider the reaction scheme below. -[•] PhLi HONH,, HCI A ELOH B D (i) Deduce the structures of compounds A, D and intermediate C. (ii) Outline the mechanism for the conversion of A to B.(weo pentane it consists of aninterantion ...?+with magnesium with ther the product dissolved with waten? (Grignard regunt} CAS -o MgloH)cl+ cH3--Give the major organic product(s) of the following. Include stereochemistry when applicable. 1) Nal Br a) 2) NACN, acetone I) NAOC(CH,),, heat b) Br 2) BH; THF; 3) H,O,. NaOH(aq) 1) HCI 2) KOCICH,), heat 1) NAOH, heat Br 2) МСРВА 1) KOC(CH,), heat Br e) 2) H,0"Assign the following as Ror S.(a) Compound D undergoes a reaction with hydrogen bromide, HBr to produce 2-bromobutane. D exists as cis-trans isomers and decolourises bromine solution in methylene chloride, CH2CI2. Sebatian D mengalami tindak balas dengan hidrogen bromida, HBr untuk menghasilkan 2-bromobutana. D wujud sebagai isomer cis-trans dan memudarkan larutan bromin dalam metilena klorida, CH2CI2. (i) Draw and name the structure of compound D. Lukis dan namakan struktur sebatian D. (ii) Draw two (2) constitutional isomers of compound D. Lukis dua (2) isomer berjuzuk bagi sebatian D.3. Predict products stereochemistry and mechanisms of the following reactions. .CO2H N. H (cat.) Ph N° A = .CO2R + A ? Ph Et solvent (i) (ii) (iii)Describe the structure of the methylethium tetramer (including the orbitalsinvolved in the bonds) and indicate a reaction in which this compound isapplied.2. Propose mechanisms for the following reactions: a. Cl-substitution in [(n²-C2H4)PtCI] by Br in methanol to give trans-[(n²-C2H)PtCI Br] b. Ārene substitution in (n-C.H.)Mo(CO); by PPh; to give fac-Mo(CO),(PPhy)s. Can the mer isomer be synthesized using the same two starting materials? If so how? If not, how is the mer isomer synthesized?SEE MORE QUESTIONS