Question

nuclop uctions uy the Sy2(lim) mechanism expected to result in complete inversion of configuration. The stereochemical outome occurs via an ion pair intermediate or through a completely dissociated ion. Bodetin 3u03utULIOIl TCAICioin of the ionization mechanism is less predictable, because it depends on whether reastin mechanisms may also show variable stereochemistry, depending upon the lifetime the intermediates and the extent of ion pair recombination. Scheme 4.2 presents data on some representative nucleophilic substiti processes. Entry 1 shows the use of 1-butyl-1-d,p-bromobenzenesulfonate (B brosylate) to demonstrate that primary systems react with inversion, even under solvolysis conditions in formic acid. The observation of inversion indicates a conceted mechanism, even in this weakly nucleophilic solvent. The primary benzyl system in Scheme 4.2. Stereochemistry of Nucleophilic Substitution Reactions Reactant Conditions Product Sterechemisty 1 CH3CH2CH2CHDOBS HCO H 99° C CH&CH2CH2CH D0,CH 9916% inv. 2 CeHsCHDOTs CH-Cо-H 25° C CeHgCHDO2CCH3 82 1% inv . 3 CH3CH(CH2)sCH3 Et,N O2CCH3 acetone, 56° C CHgCH(CH2),CH3 O2CCH CH-CHICH),сна 100% inv. OTs 4d CH-CHICH):сH, 75 % aq. dioxane 77% inv. 65° C Он OTs 75 % aq. dioxane CH2CH(CH2)sCHs 100% inv. 0.06 M NaNg, 65° C он 22% CH,CH(CH2)sCH 100% inv. N3 78% (Continaed R. Schleyer, Soc., 98, 7667 (1976). 18. F. L. Schadt, T. W. Be
please i need a guide on the stepwise meachanisms of the following reactions

Answer 1

6-0 GHz Mic-ORC Coton no one -curto COAC concexted mechanism Iso -c-ch3 c- 0 - C # CH3 -OTS C-OTS a s "(CH2)-cha ca HO-Cirih (CH2) (CH)s 3 23 1 retention! 77% inversion

_ 7500qdicrane 0.06M NON 3,65% CH3" 111 oncm 1 cuchy Conds СА 2 He Ho-Clu HgCill Cchar CUH225 CH3 22%
All reactions have concerted mechanism and all are SN² reactions.