{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chem&242E_1AnswersW10

Chem&242E_1AnswersW10 - Chem& 241 Exam#1 Winter...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Background image of page 2
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Background image of page 4
Background image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chem& 241 - Exam #1 Winter 2010 Name ‘ _, 86 100 points possible y changes to the exam will be written on the board. ‘Each question is worth 5 points unless noted. 1. Order the following carbon-carbon bonds indicated from longest to shortest bond length? 2. What is the hybridization of the each of the labeled atoms for the potent neurotoxin (—)- gephyrotoxin? - a)A= 31722, B=sp,C=Sp:, D= 319:, E= Sp: b)A— spzz, B=sp,C= Sp; D=Sp:, E: Sp: A= S1222, B— — Sp, C= 510:, D: 312:, E: sip l 3") Li. (a 3 d) =sp2, B=sp,C=sp33, D=sp:, E= Sp: #4‘ _, l A= sp,B=sp,C=sp3, D=sp3, E=sp3 (-)—gephyrotoxin source: poison frog acitivty: neurotoxin 3 '1 3‘ The common name for 1-methylpr0pyl is: 5&«- lo iii 1‘ I 4. Draw an acceptable st 6 for 4-e yl-6-(1,2—dimethylpropyl)decane W 9% ill—(ill MU l4“ midi . 5 How many alkanes of the formula C7H15 possess a teritary carbon atom? braw their structures (only the ones with a 3° carbon) and give their IUPAC names. (6 pts) , \ 6. What is the mol ular formula of the following molecule, camphor? fl . a 0,0 amp 6 1 f 0 0 camphor 7. Draw the bond line form for the following condensed structures. (4 pts each) a. CICHZCHCH3CH2CH3 PhCOCH2C(CH3)3 /f OK 8. Rank the following compounds in order of increasing basicity: CH30', HQN', H20, and NH3 ‘ a fl 6:) H30 < NH3<CH3Q' <‘T‘MH; 9. Which of the following statements concerning the cyclic molecule shown is not true? 0 H a) It contains a 7: molecular orbital formed by the overlap of a carbon p atomic orbital with an oxygen p atomic orbital. b) It contains a 0 molecular orbital formed by the overlap of two carbon sp2 hybrid atomic orbitals. c) It contains a 6 molecular orbital formed by the overlap of two carbon sp3 hybrid atomic orbitals. d) It contains a 7: molecular orbital formed by the overlap of two carbon p atomic orbitals. @ It contains a 5 molecular orbital formed by the overlap of a carbon p atomic orbital with an oxygen sp3 atomic orbital. [4 H— +1, M 10. How many different resonance structures can be drawn for the benzyl cation (shown below) which place the plus Charge on a carbon atom in the ring? Draw these structures and include any formal charge. (6 pts) CH2 ea Q: to Q ea» 43 n /‘ Czar—ch; 11. Which of the following represent resonance contributing Lewis structures for CHZNZ? A) ‘/ B) V C) Ho D) m 0 (film A and B H .‘d .H. .. .. H::é_:1\l::: N: H:C::N::L\1: H=C::N:N_: H:C::N::N:H 12. The following molecule belongs to a class of compounds known as allenes. Based on your knowledge of bonding, predict the hybridization of the carbon atom indicated by the arrow, 13. The synthetic steroid RU—486 is shown below Circle and name each class and note the fimctional groups using primary, secondary, and tertiary when applicable in the. How many pi bonds does RU'—486 contain? (10 pts) 15. In the reaction below,-Iabe1 each reactant as a nucleophile or an electrophile. /‘BH3 + CH3$CH3 —> 1.9/6.9 drank/la \ M001 ’ UL 16. Which of the following are consti tional isomers? CH3 CH3 CH3 CH3 17. What kind of molecular orbital (o, 0*, n, or 71*) results when the two atomic orbitals shown below interact in the manner indicated? ' i” («a 18. Methanesulfonic acid, CH3 SO3H, has a pKa of -7 while ethanol CH3CH20H has a pKa of 15 9 Which Is the stronger acid and what accounts for this large difference in relative acidlty? (10 pts) {\JM fl/Zk kll’lfbé Wig/kw Wu acm/ >110 Mamas/0 mo: and m a mucky 616101 fl Mm/ hmMa/é fifngak Wfl/afimz C? 97:; flew/7% 2377 CW (TM {12 sf faxing [W @4er W MMULQ de/MW 5% aWaZa/gg. 602% W 50sz m @1426 Way (fig/4 V71? (Okra/3071 dag 0/5506; m mic/um? amalgw Mam de/OCa/Zamm 60/de W mat 7W a?“ 0/7/36/1/09 ...
View Full Document

{[ snackBarMessage ]}