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: QCISD/cc-pVDZ

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 QCISD/cc-pVDZ
 hartrees
Energy at 0K-244.390345
Energy at 298.15K 
HF Energy-243.679527
Nuclear repulsion energy124.725312
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 QCISD/cc-pVDZ
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' 3219 3088 2.03      
2 A' 3110 2984 2.31      
3 A' 1482 1422 19.22      
4 A' 1467 1407 80.37      
5 A' 1412 1354 1.58      
6 A' 1138 1092 0.69      
7 A' 955 916 9.86      
8 A' 684 656 26.96      
9 A' 616 591 6.56      
10 A" 3246 3114 0.53      
11 A" 1684 1615 276.98      
12 A" 1466 1407 30.14      
13 A" 1110 1065 13.83      
14 A" 487 467 0.52      
15 A" 12 12 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 11042.9 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 10594.6 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 QCISD/cc-pVDZ
ABC
0.40784 0.35222 0.19619

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.001 -1.322 0.000
N2 -0.012 0.177 0.000
H3 1.058 -1.630 0.000
H4 -0.500 -1.665 0.914
H5 -0.500 -1.665 -0.914
O6 0.001 0.728 -1.090
O7 0.001 0.728 1.090

Atom - Atom Distances (Å)
  C1 N2 H3 H4 H5 O6 O7
C11.49821.10111.09771.09772.32162.3216
N21.49822.10002.11292.11291.22181.2218
H31.10112.10001.80731.80732.80462.8046
H41.09772.11291.80731.82843.16142.4512
H51.09772.11291.80731.82842.45123.1614
O62.32161.22182.80463.16142.45122.1802
O72.32161.22182.80462.45123.16142.1802

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 116.828 C1 N2 O7 116.828
N2 C1 H3 106.785 N2 C1 H4 107.963
N2 C1 H5 107.963 H3 C1 H4 110.555
H3 C1 H5 110.555 H4 C1 H5 112.771
O6 N2 O7 126.310
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability