01:160:307 Study Guide - Midterm Guide: Allyl Group, Benzyl Group, Propargyl

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BIAF 7e Test Bank 1

CHAPTER 5—ALKENES: BONDING, NOMENCLATURE, AND PROPERTIES

MULTIPLE CHOICE

1. What is the approximate value of the CCC bond angle in propene?

90

109

120

180

ANS: C

2. What is the approximate value of the HCH bonds angle in ethene?

90

109

120

180

ANS: C

3. What is the approximate value of the length of the carbon-carbon bond in ethene?

121 pm

134 pm

142 pm

154 pm

ANS: B

4. What type of molecular orbital is formed by the overlap of atomic orbitals shown?

 bonding

 antibonding

 bonding

 antibonding

ANS: C

5. What type of molecular orbital is formed by the overlap of atomic orbitals shown?

 bonding

 antibonding

 bonding

 antibonding

ANS: A

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BIAF 7e Test Bank 2

6. What type of molecular orbital is formed by the overlap of atomic orbitals shown?

 bonding

 antibonding

 bonding

 antibonding

ANS: A

7. What is the hybridization of carbon atoms labeled i  iii in the following structure?

i = sp; ii = sp; iii = sp

i = sp2; ii = p; iii = sp2

i = sp2; ii = sp; iii = sp2

i = sp2; ii = sp2; iii = sp2

ANS: C

9. What is the degree of unsaturation of a compound with a molecular formula of C5H10?

ANS: B

10. What is the degree of unsaturation of a compound with a molecular formula of C6H8?

ANS: D

11. What is the degree of unsaturation of a compound with a molecular formula of C5H9Br?

ANS: B

12. What is the degree of unsaturation of a compound with a molecular formula of C6H7Cl?

ANS: D

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BIAF 7e Test Bank 3

13. What is the degree of unsaturation of a compound with a molecular formula of C6H15N?

ANS: A

14. What is the degree of unsaturation of a compound with a molecular formula of C6H12N2?

ANS: C

15. Which of the following molecular formulae corresponds to a compound with a degree of unsaturation

of 2?

C5H8O2

C5H10O

C6H15N

C5H10Br2

ANS: A

16. Which of the following molecular formulae corresponds to a compound with a degree of unsaturation

of 1?

C5H8N2

C5H11N

C6H11N

C5H13NO2

ANS: B

17. Which of the following compounds has a degree of unsaturation of 3?

only 1

only 2

only 3 and 4

only 1,3 and 4

ANS: D

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Document Summary

Multiple choice: what is the approximate value of the c c c bond angle in propene, 90 , 109 , 120 , 180 . Ans: c: what is the approximate value of the h c h bonds angle in ethene, 90 , 109 , 120 , 180 . Ans: c: what is the approximate value of the length of the carbon-carbon bond in ethene, 121 pm, 134 pm, 142 pm, 154 pm. Ans: b: what type of molecular orbital is formed by the overlap of atomic orbitals shown, bonding, antibonding, bonding, antibonding. Ans: c: what type of molecular orbital is formed by the overlap of atomic orbitals shown, bonding, antibonding, bonding, antibonding. Ans: a i = sp; ii = sp; iii = sp i = sp2; ii = p; iii = sp2 i = sp2; ii = sp; iii = sp2 i = sp2; ii = sp2; iii = sp2.

Related Questions

Benzene is an organic chemical compound with the molecular formula C6H6. In the benzene molecule, carbon atoms form a ring with alternating single and double bonds connecting them. Thus, each individual carbon atom forms one ? bond with another carbon atom and one ? and one ? bond with another carbon atom. Each carbon atom also forms one ? bond with a hydrogen atom. Identify which types of orbitals overlap to form the bonds between the atoms in a benzene molecule. Drag the appropriate labels to their respective targets.

Attached is picture. Please explain/show work, will give 5 stars to correct answer, thank you very much! :)

Chemical bonds are formed by linear combinations of atomic orbital's. These atomic orbital's should have compatible energies. An axial overlap of these orbitals results in the formation of a sigma bond, whereas a lateral overlap results in the formation of a pi bond. When two atomic orbitai's on different atoms approach each other, two molecular orbital's are formed: one bonding molecular orbital and one antibonding molecular orbital. The bonding molecular orbital has a lower energy than the corresponding atomic orbital's: antibonding orbital's have higher energies than the corresponding atomic orbital's. An example using the hydrogen molecule is shown here. However, the same rule applies to systems with multiple atomic orbital's. For each atomic orbital that overlaps, one molecular orbital must form. In the diagram below. 1s orbitais from two hydrogen atoms combine to form one bonding sigma1 orbital and one antibonding orbital. The total number of bonding and antibonding orbital's is always equal to the number of orbital's that overlap. Similarly, molecular orbital's can also be formed by the overlapping of hybrid orbital's. The hybrid orbital's are formed by the linear combination of different atomic orbital's of nearly equal energy on the same atom. The atomic orbital's of nearly equal energy undergo a process of mixing and reorientation to form new orbital's of lower energy. This process is called hybridization For example, hybridization of one s and two p orbital's on an atom forms three sp2 hybrid orbital's. Benzene is an organic chemical compound with the molecular formula C6H6. In the benzene molecule, carbon atoms form a ring with alternating single and double bonds connecting them. Thus, each individual carbon atom forms one sigma bond with another carbon atom and one sigma and one pi bond with another carbon atom. Each carbon atom also forms one sigma bond with a hydrogen atom. Identify which types of orbital's overlap to form the bonds between the atoms in a benzene molecule.

The energy-level diagram in Figure 9.36 shows that the sideways overlap of a pair of p orbitals produces two molecular orbitals, one bonding and one antibonding. In ethylene there is a pair of electrons in the bonding p orbital between the two carbons. Absorption of a photon of the appropriate wavelength can result in promotion of one of the bonding electrons from the π_2p to the π*_2p molecular orbital. (a) What would you expect this electronic transition to do to the carbon–carbon bond order in ethylene? (b) How does this relate to the fact that absorption of a photon of appropriate wavelength can cause ready rotation about the carbon–carbon bond, as described in the “Chemistry and Life” box and shown in Figure 9.30?

violetreindeer58

Please explain how you arrived at your answers if possible &thank you in advance! :)

1 What mechanism does the reaction1,1-methylcyclopentanol + HBr = 1-bromo-1-methylcyclopentanolproceed by?

**I think the answer is either SN1 or SN2 but I'm not 100% sureon which one of those to choose.

a) SN1

b) SN2

c) EI

d) E2

e) none of the above

2 Which H atom is most susceptible to reaction withand removal by a free radical?

**there should be a single bond connecting the bolded carbon tothe CH3 group labeled as "V" above it

CH3

CH3%u2014CH =CH%u2014CH%u2014CH = CH%u2014CH3

I II III IV

a) I

b) II

c) III

d) IV

e) V

3 How many nodes,(other than the node through all p orbitals) are found inthe highest occupied molecular orbital of1,3,5-hexatriene?

a) 0

b) 1

c) 2

d) 3

e) more than 3

4 Which of thefollowing is the lowest energy type of transition that occurs inthe UV-Vis spectrum of 1,3,5-hexatriene?

a) a sigma bonding orbital toa pi bonding orbital transition

b) a sigma bonding orbital toa pi antibonding orbital transition

c) a pi bonding orbital to pibonding orbital transition

d) a pi bonding orbital to api antibonding orbital

e) a sigma bonding orbital toa nonbonding orbital transition

5 What is/are themajor product(s) yielded by hydration of 1-methylcyclohexene withmurcuric acetate?

beigebeetle166

01:160:307 Study Guide - Midterm Guide: Allyl Group, Benzyl Group, Propargyl

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