NitroBenzene

  Nitro benzene is an aromatic compound.  It contains a nitro and a benzene group, you can see where this molecule got its name!
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NitroBenzene Geometry

The DZV predicted the most accurate geometry.  A table of the molecular geometries predicted at each ab initio theory level and the experimental values is below. 


Bond Lengths 6-21G
Bond Lengths 6-31G
Bond Lengths DZV
Experimental Bond Length
O-N
.125nm
.123nm
.124nm
.1223nm
N-C
.146nm
.145nm
.146nm
.1486nm
C-C
.138nm
.138nm
.139nm
.1399nm
C-H
.107nm
.107nm
.107nm
.1093nm

 
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Geometry Bond Angles

The DZV predicted the most accurate geometry for bond angles as well as bond lengths. The most accurate (DZV) model is provided to the left.


Bond angles of 6-21G
Bond angles of 6-31G
Bond angles of DZV
Experimental Bond Angle (Degrees)
O-N-C
117.6
118.3
118.3
118.1
C-C-C
118.6
118.6
118.4
117.7
N-C-C
118.8
118.9
118.8
117.3
O-C-O
124.8
123.4
123.5
125.3
H-C-C
122.0
122.0
121.4
121.15

 
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HOMO of Nitrobenzene

HOMO

The highest occupied molecular orbital, orbital 32, is shown in the live figure on the right.

 
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LUMO of Nitrobenzene

LUMO

The lowest unoccupied molecular orbital, orbital 33, is shown on the left.

 
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Electrostatic Potential in Nitrobenzene

Electrostatic Potential

The highest electron density is centered around the nitro group. The colors at the beginning of the rainbow indicate the highest electron density.  The lowest electron density shown in blue is around the hydrogen atoms in the benzene. 

 
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Partial Atomic Charges of Nitrobenzene

Partial Atomic Charges

The partial atomic charges are a result of the uneven electron density shown in the electrostatic potential map above. 

 Vibrational Energies

The four most intense vibrational energies are illustrated below.  The IR spectrum1 for nitro benzene shows all of the vibrational frequencies and their intensities. 

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Vibrational Energies of Nitrobenzene. 2935cm-1

2935cm-1 Vibrational Energy

 
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Vibrational Energy of Nitrobenzene at 1415cm-1

1415cm-1 Vibrational Energy

 
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Vibrational Energy of Nitrobenzene at 1248cm-1

1248cm-1 Vibrational Energy

 
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Vibrational Energy of Nitrobenzene at 976cm-1

976cm-1 Vibrational Energy










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References

1) Spectral Database for Organic Compounds. http://sdbs.db.aist.go.jp/sdbs/cgi-bin/direct_frame_top.cgi (accessed Mar 11, 2014).

 
Based on template by A. Herráez as modified by J. Gutow
Page skeleton and JavaScript generated by export to web function using Jmol 14.1.8 2014-02-10 21:43: on Mar 9, 2014.