HW 2 - Ahmad

M A 1.41 In the compounds below, classify each bond as covalent, polar covalent, or ionic: a. NaBr b. NaOH c. NaOCH 3 d. CH3OH e. CH₂O 1.42 Draw structures for all constitutional isomers with the following molecular formulas: a. C₂H₂O b. C₂H60₂ c. C₂H4BR₂ 1.43 For each type of bond below, determine the direction of the expected dipole moment: a. C-O b. C-Mg c. C-N d. C-Li e. C-Cl f. C-Si g. O-H h. N-H

4. Identify which of the structures below correspond to a. b. C. d. CH,CH,CH,CH(CH3)2 f. (CH3)2(CH2)2CH(CH3)2 (CH3)2CH₂CH₂CH(CH3)2 CH3(CH2)2CH(CH3)2 e. g. h. H H H H—C—C—C—C | H H H с H H H I C-H CIH

3. a. E,R is? b. E,S c. S,Z 4. What is the л-energy diagram of the compound in question 3? d. R,Z e. not a.-d. a. b. C. d. e. not a.-d.

3. Provide at least one significant alternative resonance form for each molecule below. Generate a total of six correct structures to receive credit for this question. Provide curved arrows on the given structure to show how it relates to the first structure you draw in each case. An example is shown below in blue. A. R2N° C. R2N. E. B. D.

3. a. E,R ✓ is? b. E.S C. S,Z 4. What is the л-energy diagram of the compound in question 3? d. R,Z e. not a.-d. a. b. C. d. e. not a.-d.

3. Identify the relationship between the molecule in the box and structures a-g. Are they identical molecules, resonance structures, constitutional isomers (same molecular formula but atoms arranged differently), or molecules with different molecular formulas? :O: d & a. & b. d. f. لوم g. C. e. H : NH₂ OH

of How are the molecules in the following pair related? NH H₂C CH3 Select one: A. III OB. II O C. I and I. They are isomers. II. They are resonance structures. III. They are different compounds, not isomers. Clear my choice H₂C OH NH

Which of the following is a resonance structure of the given molecule?

How are the molecules in the following pair related? H3C CH₂ CH₂ CI Select one: O A. III O B. II O C. I H₂C-CH CI I. They are isomers. II. They are resonance structures. III. Neither of the choices is correct. CH3

Determine the geometry around all second-row elements in each compound. :0: a. CH3-C-CH3 b. CHg-Q-CH3 C. TỈNH, Predict the indicated bond angles in each compound. H b. CH₂ C CI a. CH₂=C=C-CI H C. CH3 C CI H d. CH3-C=N:

Specify the formal charge at each of the labeled atoms, a - c, in each of the following structures. 1. 2. H3C-N=N=N: a b C H. I H- H H II ANICE H-C a H-C H H H C-H H b Cc HH H C-H H a. a. > > b. b. +2 FOT? +1 -1 -2 C. C.

2.1 Molecular Representations Which of the following represents a correct condensed structure for the Lewis structure shown below? H H HH H- -OH H. H. -H TH. O (CH3CH2)2CHCH2CH2OH O CH3CH2CHCH2CH3CH2CH2OH O (CH3)2CHCH,CH2OH O (CH3CH2)2CHCH;CH2CH2OH Save for Later ASUNG 96 6.

Draw reasonable resonance structures for each structure below, using curved arrows to indicate electron movement.

Determine the geometry around all second-row elements in each compound drawn as a Lewis structure with no implied geometry

10. Which element has the electron configuration 1s² 2s²2p³? C. S d. Cl 11. How many hydrogen atoms are connected to the indicated carbon atom? a. O b. F a. one b. two c. three 12. Which of the following is the correct condensed structure for the following compound? H H H H H H H H-C C -C C -C C C -H HC H H Br H H H H a. CH₂C(CH3)₂CH₂CH₂(CH)BrC(CH3)2 b. CH3CH₂CH3CCH₂CH₂C(CH3)2CHBr c. (CH3)3CCH₂CH₂CH₂BrCHCH3CH3 d. four e. none H 2 d. CH3CH₂CH₂CCH₂CH₂CHBrCHCH₂CH3 e. (CH3)3CCH₂CH₂CHBRCH(CH3)2

Give each atom the appropriate formal charge: a. CH3 - O - CH3              H b. H - C- H          H c.         CH3    CH3 - N - CH3           CH3  d.        H  H    H - N - B - H          H - H

(4d-201) The caffeine molecule is shown below. Indicate the electron geometry AND the molecular shape around each of the indicated atoms (six answers in total). Be aware that the angles may not be drawn correctly in this Lewis structure. A H-C-H H. B N. C-H C-N C N. H-C-H H. HIC Z. z: H. H.

Table 1.1: Bond Angles of Selected Molecules Bond-line Structure to those you would Approximate Bond Angle 180 :NEC H-Be-H :0: 120 H. H. B- H. Critical Thinking Questions 9 Use VSEPR to explain why the ZHBH bond angle of BH; is 120°. (Hint: What is one-third se 360°?) 10. Both the HCH and ZHCO bond angles of H2CO (formaldehyde) are very close to 120°, but one is slightly smaller than the other. Predict which is smaller, and explain your reasoning. 11. Use VSEPR to assign a value of "close to 180" or “close to 120" to each bond angle marked with a dotted line. (These angles are drawn as either 90° or 180°, but may be another value.) H O: 0-H H H. H H N: H H H :N C: H C H H- CH H CCE H- CC C-H ol doss itmbT 12. Consider the following flat drawing of methane (CH4). What is ZHCH bond angle implied by this drawing if you assume it is flat? a. H -C-H b. Are the electron domains of this flat CH4 spread out as much as possible? C. Use model materials to make a model of CH4 (methane). If you…

Label the resonance structures in each pair as major, minor, or equal contributors to the hybrid. Then draw the hybrid. a. CH3-C-N-CH3 I HH CH3-C=N-CH3 HH b. CHg=c&l, H CH₂-C=CH₂ H

8. CH3CCH (propyne or methylacetylene) Projection Drawing: Perspective Drawing: lives a. Predict the angel HCC (the first carbon) CCC. b. Predict the molecular geometry around each carbon atom

Don't use hand raiting answer please and step by step answer please

The answer is E but I thought A was correct. Could you please explain why A isn’t correct?

Answer part a and b

Why the answer is C.

a, +1 b. -1 C. +2 7. 8. Draw the following compounds by representing them as covalent bonds using VSEPR Theory: a. CO2 b. H2SO4 с. СН3ОН d. N2O3 as either

Can you help me with b and c? With those problems, I'm confused where to start.

How many o bonds are in the structure of the organic molecule below? H ***** :O: -N: C Tap here or pull up for additional resources :0: IC :Z—H N Н C 010 с N: Z: H N Question 8 of 18 C-H