Question

82 Using more vigorous reaction conditions, a second acyl group can be placed on the second, unsubstituted ring (B.) but it will not substitute onto the previously substituted ring (A.) Explain (mechanistically) why disubstitution cannot occur on a previously acyl-substituted ring. 0 0 CAP T HOC CH₂T CHg CH. more vigorous conditions Fe Fe H3PO, CH How many. 13 NMR si ale 4,111

Answer 1

S.No 8.2 te + chic-o-c-CH₂ se more Vigorous 07 Reaction *In Feesocene the iron arom in +2 oxidation State * Simple ferrocene is having both cyclopeutadienyl sings are election rich * Cohen geehylation takes place on one sing the geetyl group coithdraw the electron density and hence acetylared Cyclopentadiene sing become eleeron deficient * Thus the other non-substirured Cyelopeulediewe eing will be more elechon eich hence the heathee acetyluion with more vigorous Yegetion Fekes place on second sing to give diacetylated Ferrocene