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Organic Chemistry
7th Edition
ISBN: 9780321803221
Author: Paula Y. Bruice
Publisher: Prentice Hall
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Textbook Question
Chapter 1.15, Problem 40P
Caffeine is a natural insecticide found in the seeds and leaves of certain plants, where it kills insects that feed on the plant. Caffeine is extracted for human consumption from beans of the coffee plant, from Kola nuts, and from the leaves of tea plants. Because it stimulates the central nervous system, it temporarily prevents drowsiness. Add caffeine’s missing lone pairs to its structure.
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Students have asked these similar questions
Caffeine is the active ingredient in coffee, tea, and some carbonated beverages. Add lone pairs, as needed, to the structure of caffeine.
2. From the models of SF4, BrF3, and XeF4, deduce whether different atom arrangement, called
geometrical isomers, are possible; if so, sketch them below. Indicate the preferred geometry
for each case and suggest a reason for your choice. Indicate which structures have dipole
moments and show their direction,
Preferred
Molecular
Compound
Electron
Dipole
Reason
Geometry
Moment
(Polarity) geometry
SF4
BRF3
XeF4
3. Using the Lewis structure predict the geometrical structures of the following ions and state
the hybridization of the central atom.
Ion
Electron Geometry
Molecular
Formal Charge
Central Atom
Geometry
of Central
Hybridization
Atom
CO32-
NO3-
BF4
Chemistry
[Hint: Carbon atoms in line diagrams are where bond lines meet and are not
always written. This is similar to the exercise in the textbook.]
Shown below is the structure of a polypeptide.
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H₂N
peptide bonds in this polypeptide,
represents the peptide bond.
NH
NH₂
-NH₂
Chapter 1 Solutions
Organic Chemistry
Ch. 1.1 - Oxygen has three isotopes, 16O, 17O, and 18O. The...Ch. 1.1 - Chlorine has two isotopes, 35Cl and 37Cl; 75.77%...Ch. 1.2 - Prob. 3PCh. 1.2 - a. Write the ground-state electronic configuration...Ch. 1.2 - Look at the relative positions of each pair of...Ch. 1.3 - a. Find potassium (K) in the periodic table and...Ch. 1.3 - Which bond is more polar? a. b. c. d.Ch. 1.3 - Which of the following has a. the most polar bond?...Ch. 1.3 - Use the symbols + and to show the direction of...Ch. 1.3 - Explain why HCL has a smaller dipole moment than...
Ch. 1.3 - After examining the potential maps for LiH, HF,...Ch. 1.4 - An atom with a formal charge does not necessarily...Ch. 1.4 - Prob. 15PCh. 1.4 - a. Draw two Lewis structure for C2H6O. b. Draw...Ch. 1.4 - Draw the lone-pair electrons that are not shown in...Ch. 1.4 - Prob. 19PCh. 1.4 - Which of the atoms in the molecular models in...Ch. 1.4 - Prob. 21PCh. 1.5 - Draw the following orbitals: a. 3s orbital b. 4s...Ch. 1.6 - Prob. 23PCh. 1.6 - Indicate the kind of molecular orbital (, , , or )...Ch. 1.7 - What orbitals are used to form the 10 sigma bonds...Ch. 1.7 - Explain why a bond formed by overlap of s orbital...Ch. 1.9 - Put n number in each of the blanks: a. __ s...Ch. 1.11 - Predict the approximate bond angles in a. the...Ch. 1.11 - According to the potential map for the ammonium...Ch. 1.12 - Prob. 32PCh. 1.13 - a. What are the relative lengths and strengths of...Ch. 1.13 - Prob. 35PCh. 1.14 - Prob. 36PCh. 1.15 - Which of the bond in a carbon-oxygen double bond...Ch. 1.15 - Would you expect a CC bond formed by sp2sp2...Ch. 1.15 - Caffeine is a natural insecticide found in the...Ch. 1.15 - Prob. 41PCh. 1.15 - Predict the approximate bond angles for a. the CNC...Ch. 1.16 - If the dipole moment of CH3F is 1.847 D and the...Ch. 1.16 - Account for the difference in the shape and color...Ch. 1.16 - What of the following molecules would you expect...Ch. 1 - Prob. 46PCh. 1 - Prob. 47PCh. 1 - What is the hybridization of all the atoms (other...Ch. 1 - Draw the condensed structure of a compound that...Ch. 1 - Predict the approximate bond angles: a. the CNH...Ch. 1 - Prob. 51PCh. 1 - Draw a Lewis structure for each of the following:...Ch. 1 - 53. What is the hybridization of each of the...Ch. 1 - Rank the bonds from most polar. a. CO, CF, CN b....Ch. 1 - Draw a Lewis structure for each of the following:...Ch. 1 - What is the hybridization of the indicated atom in...Ch. 1 - Prob. 57PCh. 1 - Prob. 58PCh. 1 - Draw the missing lone-pair electrons and assigns...Ch. 1 - a. Which of the indicated bonds in each molecule...Ch. 1 - For each of the following molecules, indicate the...Ch. 1 - Draw a Lewis structure for each of the following:...Ch. 1 - Rank the following compounds from highest dipole...Ch. 1 - In which orbitals are the lone pairs in nicotine?Ch. 1 - Prob. 65PCh. 1 - Prob. 66PCh. 1 - a. Which of the species have bond angles of 109.5?...Ch. 1 - Prob. 68PCh. 1 - Which compound has a larger dipole moment: CH3Cl...Ch. 1 - Prob. 70PCh. 1 - Prob. 71PCh. 1 - Explain why CH3Cl has a greater dipole moment than...Ch. 1 - Prob. 73P
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- Depending on the protein under study, the bond angle of a drug molecule can become critical to successfully deactivating a viral protein. For this reason, chemists are frequently concerned with the 3D shape of their molecules and their bond angles. The oxygen atom shown in the structure has a tetrahedral electronic geometry, meaning we would predict that it would have 109.5° bond angles. However, the actual structure, the bond angles are smaller than 109.5°. Explain why this compression occurs. Make sure to discuss what’s happening around/what groups are present around the oxygen atom.arrow_forwardAnswer the questions in the table below about the shape of the methanone (H₂CO) molecule. How many electron groups are around the central carbon atom? Note: one "electron group" means one lone pair, one single bond, one double bond, or one triple bond. What phrase best describes the arrangement of these electron groups around the central carbon atom? (You may need to use the scrollbar to see all the choices.) (choose one) X Sarrow_forwardIndicate which of the following molecules are polar. Draw the molecular structure of each polar molecule, including the arrows that indicate the bond dipoles and the molecular dipole moment. (a) HCN (b) I2 (c) NOarrow_forward
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