Open Question
We can define average bond enthalpies and bond lengths for ionic bonds, just like we have for covalent bonds. Which ionic bond is predicted to have the smaller bond enthalpy, Li—F or Cs—F?
Ch.8 - Basic Concepts of Chemical Bonding
Chapter 8, Problem 77
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?
Verified step by step guidance1
Step 1: Understand the typical bond lengths for C—O bonds. Single C—O bonds are generally longer than double or triple bonds, with typical lengths around 143 pm. Double bonds are shorter, around 120 pm, and triple bonds are even shorter, around 113 pm.
Step 2: Compare the given bond length of 120 pm to the typical bond lengths for C—O bonds. This will help determine the type of bond present in the compound.
Step 3: Analyze the bond length of 120 pm. Since it is closer to the typical length of a double bond, consider the possibility that the bond is a double bond.
Step 4: Consider the context of the compound and any additional information that might suggest the presence of resonance or other structural factors that could affect bond length.
Step 5: Conclude that based on the bond length of 120 pm, the C—O bond is most likely a double bond, as it matches the typical length for a C—O double bond.
Related Practice
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.
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 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?
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.