11. Bonding & Molecular Structure

Lewis Dot Structures: Sigma & Pi Bonds

11. Bonding & Molecular Structure

Lewis Dot Structures: Sigma & Pi Bonds

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Lewis Dot Structures: Sigma & Pi Bonds

Lewis Dot Structures: Sigma & Pi Bonds Example 1

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Sigma and Pi Bonds Explained, Basic Introduction, Chemistry

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Sigma and Pi Bonds Explained, Basic Introduction, Chemistry

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Drawing Lewis Structures with Multiple Bonds

09:04

Drawing Lewis Structures with Multiple Bonds

9.4 Sigma and Pi Bonds | General Chemistry

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Multiple Choice

How many pi bonds does the following molecule contain?

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Multiple Choice

How many sigma bonds does the following molecule contain?

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Multiple Choice

Which has greater bond strength between the carbon–carbon bond.

C₂Cl₂ vs. C₂Cl₆

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Multiple Choice

Draw the total number of sigma and pi bonds of the sulfur trioxide molecule, SO₃.

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Multiple Choice

Which of the following molecules has a double bond?

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Textbook Question

Which molecule has the shortest carbon–oxygen bond? (LO 7.3, 7.9) (a) CH3OH (b) CO (c) CO2 (d) HCOOH

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Textbook Question

The partial Lewis structure that follows is for a hydrocarbon molecule. In the full Lewis structure, each carbon atom satisfies the octet rule, and there are no unshared electron pairs in the molecule. The carbon—carbon bonds are labeled 1, 2, and 3. (c) Which carbon—carbon bond is the strongest one?

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Textbook Question

In the hydrocarbon (b) How many s bonds are there in the molecule?

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Textbook Question

The drawing below shows the overlap of two hybrid orbitals to form a bond in a hydrocarbon. (a) Which of the following types of bonds is being formed: (i) C¬C s, (ii) C¬C p, or (iii) C¬H s?

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Textbook Question

Estimate the P¬Cl bond length from the data in Figure 7.7 and compare your value to the experimental P¬Cl bond length in phosphorus tetrachloride PCl3, 204 pm.

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Textbook Question

The following diagram shows the potential energy of two atoms as a function of internuclear distance. Which bond is the strongest? Which bond is the longest?

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Textbook Question

The following ball-and-stick molecular model is a representation of acetaminophen, the active ingredient in such over-thecounter headache remedies as Tylenol. 1Red = O, gray = C, blue = N, ivory = H.2 (b) Indicate the positions of the multiple bonds in acetaminophen.

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Textbook Question

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Textbook Question

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Textbook Question

Compare the O—O bond length in O2 versus H2O2. Which bond is shorter? Why?

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Textbook Question

Based on Lewis structures, predict the ordering, from shortest to longest, of N¬O bond lengths in NO+, NO2-, and NO3-.

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Textbook Question

(b) Imagine that you could hold two atoms that are bonded together, twist them, and not change the bond length. Would it be easier to twist (rotate) around a single s bond or around a double 1s plus p2 bond, or would they be the same?

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Textbook Question

Consider the Lewis structure for acetic acid, which is known as vinegar:

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Textbook Question

Consider the Lewis structure for acetic acid, which is known as vinegar:

(b) What are the hybridizations of the orbitals on the two oxygen atoms, and what are the approximate bond angles at the oxygen that is connected to carbon and hydrogen? What are the approximatebond angles at the oxygen that is connected to carbon and hydrogen?

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Textbook Question

Bupropion, marketed as Wellbutrin, is a heavily prescribed medication used in the treatment of depression. Complete the following electron-dot structure for Bupropion by adding lone pairs of electrons.

(a) How many s and how many p bonds are in the molecule?

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Textbook Question

Acrylonitrile 1C3H3N2 is a molecule that is polymerized to make carpets and fabrics. The connections between atoms are shown.

(d) Identify the shortest bond in the molecule.

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Textbook Question

Order these compounds in order of decreasing carbon–carbon bond length: HCCH, H2CCH2, H3CCH3.

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Textbook Question

Order these compounds in order of increasing carbon–carbon bond strength: HCCH, H2CCH2, H3CCH3.

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Textbook Question

Which of the two compounds, H2NNH2 and HNNH, has the strongest nitrogen-nitrogen bond, and which has the shorter nitrogen-nitrogen bond.

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Textbook Question

The structure of acetylsalicylic acid (aspirin) is shown here. How many sigma bonds?

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Textbook Question

The structure of acetylsalicylic acid (aspirin) is shown here. How many pi bonds are present in acetylsalicylic acid?

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Textbook Question

Some mothballs used when storing clothes are made of naphthalene (C10H8), which has the following incomplete structure.

(a) Add double bonds where needed to draw a complete electron-dot structure.

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Textbook Question

Consider the molecule C4H5N, which has the connectivity shown below. (a) After the Lewis structure for the molecule is completed, how many s and how many p bonds are there in this molecule?

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Textbook Question

Butadiene, C4H6, is a planar molecule that has the following carbon–carbon bond lengths:

(c) The middle C¬C bond length in butadiene (148 pm) is a little shorter than the average C¬C single bond length (154 pm). Does this imply that the middle C¬C bond in butadiene is weaker or stronger than the average C¬C single bond?

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Textbook Question

The structure of borazine, B3N3H6, is a six-membered ring of alternating B and N atoms. There is one H atom bonded to each B and to each N atom. The molecule is planar. (e) What are the hybridizations at the B and N atoms in the Lewis structures from parts (a) and (b)? Would you expect the molecule to be planar for both Lewis structures? Would you expect the molecule to be planar for both Lewis structures?

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Textbook Question

Propose structures for molecules that meet the following descriptions. (b) Contains an N atom that has one p bond and two s bonds

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Open Question

Which of the two compounds, H₂NNH₂ and HNNH, has the strongest nitrogen-nitrogen bond, and which has the shorter nitrogen-nitrogen bond.

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Open Question

How many 𝜎 and 𝜋 bonds are in this molecule?

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Open Question

Which of the two compounds, H₂NNH₂ and HNNH, has the strongest nitrogen-nitrogen bond, and which has the shorter nitrogen-nitrogen bond?

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Open Question

How many sigma and pi bonds, respectively, are in this carboxylic acid?

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Open Question

How many of the following molecules contain at least one pi bond? C₂H₆ Cl₂CO C₂Cl₄ HCN

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Open Question

Draw the Lewis structure for the molecule CH₂CHCH₃. How many sigma and pi bonds does it contain?

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Open Question

The carbon-carbon bond in C₂H₂ contains ________ σ and ________ π bonds.

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11. Bonding & Molecular Structure

Lewis Dot Structures: Sigma & Pi Bonds

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