CHEMISTRY.237.AAA.WINTER.2000.MIDTERM1

CHEMISTRY.237.AAA.WINTER.2000.MIDTERM1 - It 1. Chemistry...

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Unformatted text preview: It 1. Chemistry 237A Name Winter 2000 Exam 1 Give a stereochcmical formula for each of the foliowing molecules. :1] H2C=NH H \ C N9 H / \H b) HCOOH /O\ ICI H ‘3. c) HCsC-Cflso ,9 \ (1% (K. C =o‘ / / H a) H2C=C=C=CH2 H H 2. @ Rank the following isomeric compounds in order of {3) increasing heat of combustion, (b) increasing stability, (1 = “Largest” 4 = “Smallest"). A if 55 0 Heat of Combustion Stability C53 H 3 2 1 @ Rank the following isomeric compounds in order of stability. a rb\ _ I 77 Me Me Me El Et Me Me I 2. 3 9 Me 3. Identify the catcgog (alcohol. ether. ketonc, etc.) to which each of th: following moleculcs belong. @ ,fo \ "N ,4 CYCL'C ALKADIENE Cram: ETHEfl KETDNE if CH3CHZCOCH2CH3 carom-cm cm KE TON E AM i DE PEEFLUDROALKAN E 0 k i , (CH3)3N CYCLE C CYcuc (TE 21mm) E‘STEK ACID mums 'RN H YDRI DE Write {he dime; products of each of the following Lewis Acid-Base reactions. Show all valence electrons and atomic charges of the product. BF3 + -——-—-——a- - OH H \(g/ H' ® (3 G) (CH3)3C + 0113011 ——————-—- (043 )3 C. '- (‘3 '* CH3 H CH3 C”: s}? ______+ + I, :0 g CH3 9 H20 + CH3CH2CH2 —————-—-- CH3 CHLCHL Complete the formulae below so that each corresponds to the indicated stcmoisomer of / ‘ Me, 5f fl: Be careful in assigning 31’0"? Pfiori‘ies' \ F 3" Me I J" E”... Me ".4 F F C2. M6 CE I: Me I R SS Me Me F B?- B'f F Co. F F a Me Me RS SR 7. Identify the relationship in each of the following pairs. Are the constitutional isomers, stereoisomers. or the same? If they are stereoisomers, are they enantiomcrs or diastercomnrs‘? a) b) and and ENANTiO SAME SAME DlflfiTEREO (Fischer projections) SAME DIASTEREO (Cis ~MVLS 'Isolmevsj ENANTJO Complete the Escher ggojectiogs below so that each corresponds to a steroisomcr of 6. TH OH CH """ CPI-h" CH— CH"— CHQOH 0H 0: Steroisomcrs within each box (one above and. one below) are cnantiomers ...
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CHEMISTRY.237.AAA.WINTER.2000.MIDTERM1 - It 1. Chemistry...

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