return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH3NO2 (Methane, nitro-)

using model chemistry: BLYP/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS Os out of place 1A'
Energy calculated at BLYP/3-21G*
 hartrees
Energy at 0K-243.589165
Energy at 298.15K 
HF Energy-243.589165
Nuclear repulsion energy119.257249
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at BLYP/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3111 3091 3.82      
2 A' 3022 3003 0.68      
3 A' 1499 1489 13.02      
4 A' 1367 1358 1.11      
5 A' 1121 1114 85.83      
6 A' 1079 1072 2.88      
7 A' 773 768 9.04      
8 A' 557 553 10.91      
9 A' 503 500 3.05      
10 A" 3146 3126 1.52      
11 A" 1498 1488 3.37      
12 A" 1311 1302 86.58      
13 A" 1026 1020 14.85      
14 A" 404 401 0.17      
15 A" 24 24 0.34      

Unscaled Zero Point Vibrational Energy (zpe) 10220.7 cm-1
Scaled (by 0.9935) Zero Point Vibrational Energy (zpe) 10154.3 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at BLYP/3-21G*
ABC
0.36064 0.33249 0.17903

See section I.F.4 to change rotational constant units
Geometric Data calculated at BLYP/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.003 -1.366 0.000
N2 -0.015 0.175 0.000
H3 1.058 -1.672 0.000
H4 -0.504 -1.690 0.914
H5 -0.504 -1.690 -0.914
O6 0.003 0.752 -1.165
O7 0.003 0.752 1.165

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 O6 O7
C11.54131.09871.09411.09412.41702.4170
N21.54132.13622.13382.13381.30001.3000
H31.09872.13621.80971.80972.88882.8888
H41.09412.13381.80971.82833.24662.5061
H51.09412.13381.80971.82832.50613.2466
O62.41701.30002.88883.24662.50612.3300
O72.41701.30002.88882.50613.24662.3300

picture of Methane, nitro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 O6 116.315 C1 N2 O7 116.315
N2 C1 H3 106.827 N2 C1 H4 106.900
N2 C1 H5 106.900 H3 C1 H4 111.231
H3 C1 H5 111.231 H4 C1 H5 113.343
O6 N2 O7 127.320
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.378      
2 N 0.214      
3 H 0.240      
4 H 0.229      
5 H 0.229      
6 O -0.268      
7 O -0.268      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.072 -3.241 0.000 3.241
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.323 -0.168 0.000
y -0.168 -21.664 0.000
z 0.000 0.000 -25.749
Traceless
 xyz
x 2.384 -0.168 0.000
y -0.168 1.871 0.000
z 0.000 0.000 -4.255
Polar
3z2-r2-8.510
x2-y20.342
xy-0.168
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.090 -0.007 0.000
y -0.007 3.640 0.000
z 0.000 0.000 4.605


<r2> (average value of r2) Å2
<r2> 68.284
(<r2>)1/2 8.263