Multiple Choice
Which of the following statements correctly describes the Lewis dot structure of the neutral compound carbonyl sulfide (CSO)?
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11. Bonding & Molecular Structure
Lewis Dot Structures: Neutral Compounds
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Which of the following best describes the correct Lewis dot structure for the neutral compound H2CS (thioformaldehyde)?
A
Carbon forms a single bond with sulfur, each hydrogen is bonded to sulfur, and carbon has an incomplete octet.
B
Carbon forms a double bond with sulfur, each hydrogen is bonded to carbon, and all atoms have complete octets.
C
Carbon forms a triple bond with sulfur, and each hydrogen is bonded to sulfur.
D
Sulfur forms a double bond with each hydrogen, and carbon is not bonded to sulfur.
Verified step by step guidance1
Identify the total number of valence electrons available in the molecule H2CS. Carbon has 4 valence electrons, sulfur has 6, and each hydrogen has 1, so sum these to find the total.
Determine the central atom, which is usually the least electronegative atom that can form multiple bonds; in this case, carbon is the central atom.
Arrange the atoms with carbon in the center, hydrogens bonded to carbon, and sulfur bonded to carbon as well.
Form bonds between atoms by pairing electrons: start by forming single bonds between carbon and each hydrogen, and between carbon and sulfur. Then, check if the octet rule is satisfied for each atom.
If any atom (especially carbon or sulfur) does not have a complete octet, consider forming double bonds (such as a double bond between carbon and sulfur) to satisfy the octet rule for all atoms.
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