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Given the structures answer the following questions. 
select the molecules shown above that are planar. in this case, planar implies that all atoms are in a single plane. Also, select all of the molecules, if any, with delocalized pi electrons

7.67 13 Given the structures answer the following questions. N,F2 H,NNH2 NCCN v5th attempt hi See Periodic Table See Hint Part 1 (0.5 point) Select the molecules shown above that are planar.In this case, planar implies that all atoms are in a single plane. Choose one or more: □ N2F2 □ H2NNH2 □ NCCN None of these structures are planar. 06/10
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Answer #1

Q1

N2F2 --> planar since no lone pairs left to reppeal

H2NNH2 --> not planar, since Nitrogen has lone pairs which reppeal each bond, therefore, 3-D structure

NCCN --> planar, mainly because of the triple bond formed by Carbon

Q2

delocalized electrons

must have at least double bonds so PI electrons are present

N2F2 --> not likely

H2NNH2 --> no electrons in ¨PI

HCCN --> linear, thereofre not possible

choose "none"

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Answer #2

Q1 N2F2 planar because there are no lone pairs left to repel 

H2NNH2 not planar it is a 3-D structure 

NCCN planar and has a triple bond 

Q2 

N2F2 does not 

H2nnh2 does not

HCCN is the correct answer because although it wouldn't appear to have delocalized pi bonds it is possible to draw a resonance structure moving pi electrons away from their original location.

Answer was confirmed correct through Smartwork5 itself.


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