1 Draw a resonance structure, complete with all formal charges and lone (unshared) electron pairs, that shows the resonance interaction of the chloro with the para position in chlorobenzene. CI ㅁ chlorobenzene
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- Draw a structure for 1,1-dichloro-3-propoxycyclopentane. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • Do not include lone pairs in your answer. They will not be considered in the grading. • In cases where there is more than one answer, just draw one. opy asteFrom what we know today, what do the two Kekulé structures for benzene really represent? August Kekulé was the first person to propose a viable structure for benzene in 1865. Structures that can be separated at low enough temperatures (near absolute zero). Structures that are in a state of rapid equilibrium. O Structures that are in resonance. Structures that are conjugated trienes (--C=C--C%3DC--C3C--).Question 12 Consider (and draw on a piece of scratch paper) the following four C6H12 hydrocarbons. Which of these isomers is the highest in energy, and thus has the largest heat of combustion (i.e. would release the most energy upon burning)? (Hint: think about bond strengths; H20 and CO2 have much stronger bonds than hydrocarbons and O2). O Cyclohexane 1-hexene Methylcyclopentane (E)-3-hexene
- 12. Write bond-line structural formulas for (a.) two primary alcohols, (b.) a secondary alcohol, and (c.) a tertiary alcohol-all having the molecular formula CaH100.Estimate the heat released when 1-butene(CH3CH2CHCH2) reacts with bromine to give CH3CH2CHBrCH2Br. Bond enthalpies are CH : 412 kJ/mol; CC : 348 kJ/mol;CC : 612 kJ/mol; CBr : 276 kJ/mol;BrBr : 193 kJ/mol. 1.317 kJ/mol 2.507 kJ/mol 3.95 kJ/mol 4.288 kJ/mol 5.181 kJ/molAromatic compounds got their name because many have strong smells. Benzene, toluene, aniline, and phenol are common structures from which most aromatic compounds are derived. (Figure 1) When naming aromatic compounds with three or more substituents, the ring is numbered to give the smallest possible set of numbers. For example, this phenol derivative (Figure 2) is called 4-bromo-3-chlorophenol. The substituents Figure CH3 NH₂ 1 of 2 > OH benzene toluene aniline phenol Name the following molecule by its IUPAC name. ► View Available Hint(s) Submit Part B Name the following molecule by its IUPAC name. CI Br CH3 CI Br
- Draw a structural formula for the one constitutional isomer of the unbranched alkane C7H16 in which the longest carbon chain has 4 atoms. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • In cases where there is more than one answer, just draw one.We have thus far determined the single bond connectivity for (CH, ),CO as: H Н—с—с-—с—н H H There are six valence electrons still unaccounted. Carbon must form four bonds in order to satisfy the octet rule. Add a bond to carbon and fill in the remaining missing electrons. Select Draw Rings More H H. H H HHere is the chemical structure of 2-bromobutane: H H. H C-C-H H :Br: H H Decide whether each molecule in the table below is another molecule of 2-bromobutane, a molecule of an isomer of 2-bromobutane, or a molecule of an entirely different compound. molecule relationship to 2-bromobutane CH, (Choose one) H,c=ċ=CH,-Br Explanation Check O 2021 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center I Accessibility P Type here to search 76°F DELL F1 F2 F3 F4 F5 FB F9 F10 F11 F12 PrtScr PAA @ %23 2$ 1 8. 9 Q W R Y. A F G H. K V N4 Alt Ctri Alt Σ B. C1
- 4. One of the resonance structures of "tropylium ion" (C7H7*) is shown below. It is planar and aromatic with Hückel number of p-n electrons where n=1. Draw all the other contributing resonance structures. (There are more than two.) Based on the “average" of the contributing resonance structures, how close does the average ring carbon get to its "octeť" in tropylium ion?I. Molecule's Degree of Unsaturation* *to avoid confusion, we shall use "degree of unsaturation" to refer to the number of pi bonds or number of rings present in the molecule as a result of the loss of hydrogen atoms when referenced using the alkane formula of C,„H2n+2" The numerical value for the degree of unsaturation = 1 means that a molecule of hydrogen, H,, or two atoms of hydrogen are lost and instead 1 pi bond OR 1 ring is seen in the molecule. For this exercise, determine the degree of unsaturation of each of the following compounds: CH3 1. 2,3,3-Trimethyl-1,4,6-octatriene CH3 6. CH3 2. 3-Ethyl-2,2,-dimethyl-3-heptene `CH3 3. 2-Methyl-1,5-hexadiene 8. 7. ÇH3 H. CH3 4. 4-tert-Butyl-2-methylheptane Answers: 1. L2. 3. _4. 5. 6. _7. 8. 5.Write a Lewis structure for acetic acid, CH3C(=0)OH, showing all valence electrons. • You do not have to consider stereochemistry. Explicitly draw all H atoms. Include all valence lone pairs in your answer. орy aste