객관식
Which of the following best describes the correct Lewis structure for (ethene)?
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1. A Review of General Chemistry
Lewis Structure
객관식
Which of the following best describes the correct Lewis structure for (2,2-dimethylpropanal, also written as )?
A
A central carbon atom bonded to four methyl groups, with one of the methyl groups containing a double-bonded oxygen.
B
A central carbon atom bonded to two methyl groups, one ethyl group, and one hydroxyl group.
C
A straight chain of five carbon atoms with an aldehyde group at one end and no branching.
D
A central carbon atom bonded to three methyl groups and one aldehyde group, with the aldehyde carbon double-bonded to oxygen and single-bonded to hydrogen.
검증된 단계별 안내1
Identify the molecular formula and the given name: C\_5H\_10O corresponds to 2,2-dimethylpropanal, which is an aldehyde with branching at the second carbon.
Recognize that '2,2-dimethylpropanal' means the parent chain is propane (3 carbons), with two methyl groups attached to the second carbon, and an aldehyde group (-CHO) at the end of the chain.
Draw the main chain of three carbons, numbering from the aldehyde end (carbon 1 is the aldehyde carbon). Attach the aldehyde group (carbon 1) with a double bond to oxygen and a single bond to hydrogen.
At carbon 2, attach two methyl groups (CH\_3) as branches, and the remaining bond connects to carbon 3, which is a methyl group (CH\_3) to complete the structure.
Verify that the central carbon (carbon 2) is bonded to three methyl groups and one carbon (carbon 1), which is part of the aldehyde group, ensuring the aldehyde carbon has a double bond to oxygen and a single bond to hydrogen.
