Another Configuration Problem

[skyisblue]

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I've looked at this problem and I find these molecules to be identical with S configuration or they're both S enantiomer. BUT solution guide says that it's R enantiomer for both. I do not see that at all.

I say the carboxylic group has 2nd priority because Oxygen is heavier than nitrogen.

BTW, the hydrogens have dashed lines or are directed in the back. The wedges are on the bottom.

 

[BodybldgDoc]

I've looked at this problem and I find these molecules to be identical with S configuration or they're both S enantiomer. BUT solution guide says that it's R enantiomer for both. I do not see that at all.

I say the carboxylic group has 2nd priority because Oxygen is heavier than nitrogen.

BTW, the hydrogens have dashed lines or are directed in the back. The wedges are on the bottom.

you are right. they should both be S configuration. the solution guide is wrong.