4.41 Which compound would you expect to be the more stable: cis-1,2-dimethylcyclopropane ortrans-1,2-dimethylcyclopropane? Explain your answer.
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4.41 Which compound would you expect to be the more stable: cis-1,2-dimethylcyclopropane or
trans-1,2-dimethylcyclopropane? Explain your answer.
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- 7.40 a. Suggest an explanation for the fact that 1-methylcyclopropene is some 42 kJ/mol (10 kcal/mol) less stable than methylenecyclopropane. -CH3 is less stable than CH2 1-Methylcyclopropene Methylenecyclopropane b. On the basis of your answer to part (a), compare the expected stability of 3-methylcyclopropene with that of 1-methylcyclopropene and that of methylenecyclopropane.2.35 Write a structural formula for each of the following compounds: (a) 6-Isopropyl-2,3-dimethylnonane (b) 4-tert-Butyl-3-methylheptane (c) 4-Isobutyl-1,1-dimethylcyclohexane (d) sec-Butylcycloheptane (e) CyclobutylcyclopentaneHow many isomers (structural, geometric, and stereo) have the formula C5H10, and have "cyclo" in their name? (i.e. they contain a ring) 4 06 07 5
- 10. Which of the following compounds is 2-methyl-3-(1-methylethyl)hexane? CH3 CH₂-CH-CH-CH₂-CH₂-CH₂ CH-CH3 CH3 CH3 CH₂-CH-CH-CH₂-CH₂-CH₂ CH-CH₂-CH₂ CH3 CH₂ (d) (a) 4-methylnaphthalene (b) 2-methylnaphthalene (c) 1-methylnaphthalene (d) 2,3-benzenetoluene CH3 CHy-CH-CH-CH, CH, CH-CH₂ CH3 11. What is the best name for the following compound? O CH3 CH3 CH3-CH-C-CH, CH, CH3 CH₂-CH3 12. Which of the following symbols is normally used to represent an alpha particle? (a) 'p (b) "He (c) je (d) 4A (e) +jeb) C8H13Bг2Cl2O2 Isomer #1: Name of Isomer #1: Name of Isomer #2: Name of Isomer #3: Isomer #2: Isomer #3:Name the following compound according to the IUPAC rules: H. (1) 3-ethyl-5,6-dimethyl-6-oxohept-1-ene (2) 5-ethyl-2,3-dimethylhept-6-ynal (3) 2,3-dimethyl-5-ethylhept-6-enal (4) 5-ethyl-2,3-dimethylhept-6-enal
- 1) Azulene, bicyclo[5.3.0] decapentaene, is an beautiful blue colored hydrocarbon with a large dipole moment (for a hydrocarbon). Draw resonance structures that could explain the large dipole moment. AzuleneFor which compound containing a heteroatom (an atom other than carbon or hydrogen) does the molecular ion have an even-numbered mass? For which does it have an odd-numbered mass? Q.) A bromoalkane with the molecular formula CnH2n11BrClassify the pair of compounds as the same compound, enantiomers, diastereomers, constitutional isomers, or not isomeric. Also, select the correct IUPAC name, including the correct (R) or (S) designation, for each. H3C CH3 H3C H3C. CH3 CH3 H3C -CH3 H Compound 1 Compound 2 The compounds are constitutional isomers enantiomers not isomeric identical diastereomers Ill.
- 5.76 2,3-Dibromoprop-1-ene (C3H4Br₂) has four H atoms. Suppose that any of these H atoms can be replaced by a Cl atom to yield a molecule with the formula C3H3Br₂Cl. (a) Identify two H atoms where this substitution would yield constitutional isomers of C3H3Br₂Cl; (b) enantiomers of C3H3Br₂Cl; (c) diastereomers of C3H3Br₂Cl. co 11 HHH Juods H Brugtrio 2 bas A 2,3-Dil so ontemme A chon Br 2,3-Dibromoprop-1-eneWhich are constitutional isomers ? hexanal and 2 hexanone (R)-2-chlorobutane and (S)-2-chloropropane (E)-2-hexene and (Z)-2-hexene 1-bromobutane and 1-bromoethane1. Give the IUPAC name CH3 CH3CH2CH=CH2CH3 (a) (b) H2C=CHCHCCH3 ČH3 Only CH3 CH3 CH3CH=CHCHCH=CHCHCH3 2. Give the IUPAC name of each alkyne. CH3CHCH2CH3 CH,CH,CH2CH=CHCHCH,CH3 (c) (d) (a) (b) CH3CHC=CCHCH, CH3 HC CCCH3 (c) CH3 CH3CH2CC=CCH2CH2CH3 (d) CH3 CH3 CH3CH,CC CCHCHg CH3 3. Assign E or Z configuration to the following alkenes: CH2OH (a) H3C (b) CI CH2CH3 C=C CH3CH2 CI CH3Ó CH2CH2CH3 4. Predict the products of the following reactions. (b) CH3 CH3C=CHCH2CH3 (a) HCI HBr 5. Draw the product/s of the reaction below and indicate their stereochemistry. CH3C=CH CH Br2 He H,0 6. What product would you obtain by the hydration of 1-butyne? Show the mechanism. 7. What alkyne is formed in the reaction below? [1] NANH, (2) CH,Br H-C=C-H
