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  • BÀI TẬP HÓA HỮU CƠ 2

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    624 views2 pages

    BÀI TẬP HÓA HỮU CƠ 2

    Uploaded by

    Lê Tuấn

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as DOC, PDF, TXT or read online from Scribd
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    of 2

    BI TP HA HU C 2

    Bi 1: Hp cht A: C5H8O2 tn ti 2 dng ng phn lp th. C 2 dng u c tnh quang hot. Hidro ha A c B c cu to C 5H10O2. C th tch B thnh 2 i quang ca nhau. a. Vit CTCT ca A (2 dng) bit rng A tc dng vi NaHCO3 gii phng kh CO2. b. Cho mi dng ca A tc dng vi Br2. Hy vit cng thc Fis, cng thc chiu Niumen ca sn phm sinh ra trong mi trng hp c. Nu 1 phng php tng hp hp cht B xut pht t dn xut halogen. Bi 2: a. Hp cht A c cng thc C8H16O. A cho phn ng halogenfoc nhng khng cho phn ng cng vi H2. Hy cho bit chc ha hc ca A? b. Bit rng A ch c 1 cacbon bt i, 2 nhm CH 3 khng c ng phn hnh hc loi cyclan (vng no) v c vng 5C. Vit CTCT ca A? c. Tch H2O ca A (H2SO4) th nhn c 1,2-ddimetylxiclohexxen. Hy ngh c ch tch nc ca A? d. Hy xc nh sn phm chnh to thnh khi tch nc ng phn ca A l 2,2ddimetylxiclohexxanol (B)? Bi 3: Hp cht hu c X c CT C 5H4O2 phn ng vi thuc th sip (c tnh andehit) v vi phenylhidrazin. Ngi ta thc hin hng lot chuyn ha nh sau:
    X KMnO4 A (C5H4O3) C6H8N2 (E) t0 C4H4O (B) H2O/H+ +H2,xt C4H8O (C) HCl du

    C4H8Cl2 (D)

    KCN

    C6H10O4 (G)

    hexametylendiamin

    nilon-6,6

    Bit rng A tan c trong dung dch NaHCO 3 cn C tan c trong H2SO4 c, lnh, khng lm mt mu thuc tm. Trn ph hng ngoi khng c cc i vng 3200-3600 cm-1. Hy xc nh CTCT ca X v cc sn phm t A-G? Bi 4: S thy phn trong mi trng axit ca este 1-metylpropylaxetat c ng phn quang hc xy ra vi s lu gi cu hnh. Tri li s thy phn trong mi trng H + ca 1metyl-1-phenylpropylaxetat xy ra vi s to bin th raxemic. Hy ngh c ch phn ng trong 2 TH trn?

    Bi 5: A l C5H10O3 tan d dng trong baz long, c ng phn quang hc. Khi un nng A cho C5H8O2 khng c ng phn quang hc na nhng vn lm qu tm ha . S oxi ha = O3, tip theo thy phn C5H8O2 etanal v axit 2-fomyl axetic. S oxi ha A bng CrO3 cho C m cht ny cho phn ng c vi 2,4-dinitrophenylhidrazin v cho phn ng halogenfoc. Xc nh CTCT cc cht? Bi 6: - A l C5H8O3 cho kt ta vi 2,4-dinitrophenylhidrazin v tan trong baz long d dng. Xc nh CTCT A? - A cho phn ng iodofoc. Xc nh CTCT ng ca A? - A khng mt CO2 d dng khi un nng. Xc nh CTCT ng ca A? Bi 7: xc nh CTCT ca hp cht thm A: C9H10O, ta thc hin cc phn sau y: a, - Oxi ha cht A vi thuc tm m c cho 2 axit: C7H6O2 v C2H4O2 - A cho phn ng vi CH 3MgBr sau thy phn thu c ancol bc 3 c 1 C bt i xng. Xc nh CTCT v gi tn A. b, Cho A + CH3I/NaNH2, ngi ta c lp c cht B l C11H14O. Vit CTCT v Gi tn B? c, Cho B tc dng vi (CH3)3CMgCl sau thy phn khng thu c ancol tng ng m thu c ancol C11H16O. Hy gii thch kt qu? Bi 8: T C2H5MgCl v cc ha cht v c cn thit, hy tng hp: a.

    C2H5

    OH

    b. CH3CH2CH(CH3)COOH Bi 9: Cho C5H10O tc dng vi C2H5MgCl ri tch nc hp cht to thnh thu c anken. Cht ny ozon ha ri thy phn ta c ietylxeton v andehit axetic. Hy xc nh cng thc cu to cc cht? Bi 10: T etanol, axit axetic, benzen vi cc cht v c v iu kin y hy iu ch 2,5-ietylaxetophenyl.

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