Question

Please give a detail mechanism of 22-29

22. What is the major organic product obtained from the following reaction? 1. NalH 2 CHỊCH CHỊCH EM a. l-methyl-4-nonyne b. 2-methyl-4-nonyne c. 2-methyl-3-nonyne d. 3-methyl-4-nonyne ANSWER: d 23. What is the major organic product obtained from the following reaction? Br. CH, C=C=CH CH, CH,COOH, LIBE - a. (E) 1.2-dibromobutene b. (Z) 1,2-dibromobutene c. (E) 2,3-dibromobutene d. (Z) 2,3-dibromobutene ANSWER: C 25. What is the major organic product obtained from the following reaction? 2 mol Bry CH =C =C-CH, a. 2,3-dibromobutane b. 2,2,3,3-tetrabromobutane c. 2,3-dibromobutene d. 2,2-dibromobutane ANSWER: 27. What is the major organic product obtained from the following reaction? 2 mol HBO CH3-CEC-CH. a. 2,3-dibromobutane b.2.2.3.3-tetrabromobutane c. 2,3-dibromobutene d. 2,2-dibromobutane ANSWER: 29. What is the major organic product obtained from the following reaction? CH3CH2-CECH 1.BH . 2.H.O., NaOH a. butanal b. cis-2-butene c. 2-butanol

Answer 1

O Naalta ♡ CH₂-Cely-CH₂ - CH₂ - Ar Step-I NaNita Base] Abstract proton from Alhyne cach wit step-I IX this Anion will alackan Alkyl Halide By substitution Reaction - City-CH, Cty Cth-nr. J. c-city-CH₂- CH₂-cita I methyl-y-nonyne - Hy-cac-cita Bra - lt₂coon, Libr Step I - in this peaction first attack of Electrophile cort) And form catainic tri membereel ping

CH-C= C - CHY Step- o -cefter treet Bokwill celtach from Bach side so form & Alwene rather than 2 Alkene Cty - c=c-cho OP CH7. E (2,3 di Bromo Bretane) - CH - CEc-cth 2 mole Drz Step. I first celtack of Bro form trimembered Cyclic Ring that Bro will cettack And process repeat two time And And cefter this !

CH₂ - C=C-CH₂ Brey ( City- c=c-alty a loro - c- altz I pepecet process CH- & Br Br (2,2, 3,3 tetraprono Butune). CH₂ - CEC-et, 2001, - Hor Step I HO - on first triple Electrophile cetteet of Band 40 Chce at - CH - Qach-city

Step-II cett-ack of Bro on Carboccetion CH- & in-ct no CHyaç = ch-alta Br this process creen with stuble Carb occation Repeat And form

CHy-cach-cltz If chi e che ha CH- c-ch-Cty CHI Step II poo (Stable (erbocation of oro will cettel Jy CH) - C-Clda-chy cltya & -chi-chy (22 di Bromo Buture)

0.29. - Chi-chi-c=c-y On ♡ H₂O2, puon Step. I - attack of B Hy on Alkene CHI - CH₂ - cen H BH2 Cdy-clf, - c=ch H2o2ono Calty-CH₂-hc=44 I textemerization CH₂=CH-Cha-ch a Butanal