9.20 - 3 . Hydrogens can only make one bond, and so they...

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Key: 20. Which of the following molecules contains at least one atom with sp 2 hybridization? a. the alkane with 3 carbon atoms (propane) b. the alcohol made from propane c. acetic acid d. benzene e. C 2 H 2 f. 2 of the above g. 3 of the above Remember that sp 2 hybridization can be determined by simply looking at a molecule and noting its shape. If something is sp 2 hybridized then it is trigonal planar (sp 3 is always tetrahedral, sp is always linear). This is because only the hybridized orbitals will contribute to electron domains and thus to shape. Pi orbitals just kind of tag along with hybrid orbitals, and don’t affect shape. Let’s look at the answers one at a time: Choice a is wrong. All of the carbons have four electron domains and are therefore all sp
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Unformatted text preview: 3 . Hydrogens can only make one bond, and so they are always s orbitals. propane Choice b is wrong. All of the non-hydrogen atoms have four electron domains and are therefore sp 3 hybridized. (There are two lone pairs on the oxygen) the alcohol made from propane or Choice c is correct. The carbonyl carbon and oxygen both have only three electron domains, and are therefore sp 2 hybridized acetic acid Choice d is correct. All of the carbons in benzene are trigonal planar, containing only three electron domains, and are therefore sp 2 hybridized. benzene Choice e is wrong. Since both carbons have two electron domains and are linear, they must be sp hybridized. C 2 H 2...
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9.20 - 3 . Hydrogens can only make one bond, and so they...

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