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 CHONH2 (formamide)

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 Planar 1A'
1 2 no Non-Planar 1A

Conformer 1 (Planar)

Jump to S1C2
Energy calculated at MP2=FULL/6-31G
 hartrees
Energy at 0K-169.182957
Energy at 298.15K-169.186911
HF Energy-168.850845
Nuclear repulsion energy69.750891
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
4/u)
Dep P Dep U
1 A' 3762 3574 38.66      
2 A' 3614 3433 46.30      
3 A' 3060 2907 95.66      
4 A' 1731 1645 265.71      
5 A' 1681 1597 53.31      
6 A' 1446 1374 16.92      
7 A' 1296 1231 109.11      
8 A' 1074 1021 7.71      
9 A' 564 536 10.78      
10 A" 1034 982 1.46      
11 A" 641 609 136.05      
12 A" 460 437 310.66      

Unscaled Zero Point Vibrational Energy (zpe) 10180.5 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 9672.5 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
2.37137 0.36201 0.31406

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 0.000 0.429 0.000
O2 1.238 0.198 0.000
N3 -0.976 -0.542 0.000
H4 -0.404 1.454 0.000
H5 -0.707 -1.517 0.000
H6 -1.958 -0.306 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.25931.37721.10102.07052.0914
O21.25932.33462.06682.59273.2350
N31.37722.33462.07611.01151.0090
H41.10102.06682.07612.98592.3478
H52.07052.59271.01152.98591.7406
H62.09143.23501.00902.34781.7406

picture of formamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 119.385 C1 N3 H6 121.659
O2 C1 N3 124.564 O2 C1 H4 122.106
N3 C1 H4 113.329 H5 N3 H6 118.956
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (Non-Planar)

Jump to S1C1
Energy calculated at MP2=FULL/6-31G
 hartrees
Energy at 0K-169.182957
Energy at 298.15K-169.186911
HF Energy-168.850846
Nuclear repulsion energy69.751583
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
4/u)
Dep P Dep U
1 A 3762 3574 38.67      
2 A 3613 3433 46.30      
3 A 3059 2907 95.73      
4 A 1731 1645 265.70      
5 A 1681 1597 53.39      
6 A 1446 1374 16.97      
7 A 1296 1232 109.04      
8 A 1074 1021 7.68      
9 A 1034 982 1.47      
10 A 641 609 136.61      
11 A 564 536 10.79      
12 A 460 437 310.07      

Unscaled Zero Point Vibrational Energy (zpe) 10180.8 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 9672.8 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
2.37185 0.36200 0.31407

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.151 0.402 -0.000
O2 -1.229 -0.250 -0.000
N3 1.105 -0.164 0.000
H4 -0.133 1.503 0.000
H5 1.194 -1.172 0.000
H6 1.941 0.401 -0.000

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.25931.37711.10112.07032.0915
O21.25932.33462.06682.59253.2352
N31.37712.33462.07601.01161.0091
H41.10112.06682.07602.98582.3481
H52.07032.59251.01162.98581.7406
H62.09153.23521.00912.34811.7406

picture of formamide state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 119.368 C1 N3 H6 121.684
O2 C1 N3 124.574 O2 C1 H4 122.097
N3 C1 H4 113.330 H5 N3 H6 118.948
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability