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: MP2=FULL/6-31G

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 MP2=FULL/6-31G
 hartrees
Energy at 0K-244.025273
Energy at 298.15K 
HF Energy-243.515147
Nuclear repulsion energy120.879151
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 MP2=FULL/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3228 3067 2.73      
2 A' 3117 2962 2.70      
3 A' 1551 1473 13.21      
4 A' 1488 1414 1.69      
5 A' 1323 1257 33.75      
6 A' 1189 1129 0.03      
7 A' 879 835 3.30      
8 A' 644 612 28.16      
9 A' 576 547 2.42      
10 A" 3250 3088 0.21      
11 A" 1791 1702 6.14      
12 A" 1554 1477 16.29      
13 A" 1167 1109 0.85      
14 A" 473 450 0.49      
15 A" 44 42 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 11136.4 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 10580.7 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 MP2=FULL/6-31G
ABC
0.37646 0.33755 0.18431

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.003 -1.349 0.000
N2 -0.014 0.157 0.000
H3 1.047 -1.674 0.000
H4 -0.508 -1.677 0.906
H5 -0.508 -1.677 -0.906
O6 0.003 0.751 -1.139
O7 0.003 0.751 1.139

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 O6 O7
C11.50621.09351.09071.09072.38882.3888
N21.50622.11672.10502.10501.28451.2845
H31.09352.11671.79951.79952.87572.8757
H41.09072.10501.79951.81183.21552.4925
H51.09072.10501.79951.81182.49253.2155
O62.38881.28452.87573.21552.49252.2779
O72.38881.28452.87572.49253.21552.2779

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 117.517 C1 N2 O7 117.517
N2 C1 H3 107.961 N2 C1 H4 107.217
N2 C1 H5 107.217 H3 C1 H4 110.946
H3 C1 H5 110.946 H4 C1 H5 112.312
O6 N2 O7 124.919
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability