Open Question
Predict the length of the carbon–carbon bond you would expect if two H2C molecules reacted with each other by a combination reaction.
Ch.8 - Basic Concepts of Chemical Bonding
Chapter 8, Problem 78
A new compound is made that has a C—N bond length of 118 pm. Is this bond likely to be a single, double, or triple C—N bond?
Verified step by step guidance1
Step 1: Understand the typical bond lengths for C—N bonds. Single, double, and triple bonds have different bond lengths due to the number of shared electron pairs. Generally, single bonds are the longest, and triple bonds are the shortest.
Step 2: Recall the approximate bond lengths for C—N bonds: a single C—N bond is typically around 147 pm, a double C—N bond is around 130 pm, and a triple C—N bond is around 116 pm.
Step 3: Compare the given bond length of 118 pm to the typical bond lengths for C—N bonds. Determine which bond type the given length is closest to.
Step 4: Consider the nature of bond lengths: shorter bond lengths indicate stronger bonds due to more shared electrons, which is characteristic of multiple bonds (double or triple).
Step 5: Based on the comparison, infer whether the bond is more likely to be a single, double, or triple bond.
Related Practice
Textbook Question
Draw the Lewis structure for NO+ . Is the nitrogen–
oxygen bond in NO+ longer, shorter, or the same length as the
nitrogen–oxygen bond in NO? Explain.
Draw the Lewis structure for NO+ .
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Open Question
A new compound has a C—O bond length of 120 pm. Is this bond likely to be a single, double, or triple C—O bond?
Textbook Question
Consider the lattice energies of the following Group 2A compounds: BeH2, 3205 kJ/mol; MgH2, 2791 kJ/mol; CaH2, 2410 kJ/mol; SrH2, 2250 kJ/mol; BaH2, 2121 kJ/mol. (a) What is the oxidation number of H in these compounds?
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Open Question
A metal oxide has a lattice energy in the range of 3300 kJ/mol. Is the charge on the metal ion M likely to be 1+, 2+, or 3+? Explain.
Textbook Question
The ionic compound CaO crystallizes with the same structure as sodium chloride (Figure 8.3). (a) In this structure, how many O2- are in contact with each Ca2+ ion (Hint: Remember the pattern of ions shown in Figure 8.3 repeats over and over again in all three directions.)
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