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: MP4/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no Planar 1A'
1 2 yes Non-Planar 1A

Conformer 1 (Planar)

Jump to S1C2
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-169.428028
Energy at 298.15K 
HF Energy-168.927109
Nuclear repulsion energy70.622253
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 MP4/6-31G*
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' 3735 3566        
2 A' 3597 3434        
3 A' 2983 2848        
4 A' 1801 1720        
5 A' 1642 1567        
6 A' 1430 1365        
7 A' 1293 1235        
8 A' 1060 1012        
9 A' 559 534        
10 A" 1035 988        
11 A" 648 619        
12 A" 200i 191i        

Unscaled Zero Point Vibrational Energy (zpe) 9790.8 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 9348.3 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 MP4/6-31G*
ABC
2.41590 0.37250 0.32273

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.423 0.000
O2 1.212 0.223 0.000
N3 -0.951 -0.557 0.000
H4 -0.444 1.440 0.000
H5 -0.658 -1.526 0.000
H6 -1.939 -0.340 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.22881.36561.10992.05782.0835
O21.22882.29962.05572.56113.2009
N31.36562.29962.06031.01311.0111
H41.10992.05572.06032.97452.3244
H52.05782.56111.01312.97451.7458
H62.08353.20091.01112.32441.7458

picture of formamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 119.040 C1 N3 H6 121.769
O2 C1 N3 124.768 O2 C1 H4 122.970
N3 C1 H4 112.262 H5 N3 H6 119.190
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (Non-Planar)

Jump to S1C1
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-169.428114
Energy at 298.15K-169.431867
HF Energy-168.926942
Nuclear repulsion energy70.584713
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 MP4/6-31G*
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 3717 3549        
2 A 3583 3421        
3 A 2986 2851        
4 A 1800 1719        
5 A 1647 1573        
6 A 1431 1366        
7 A 1292 1234        
8 A 1073 1025        
9 A 1030 983        
10 A 636 607        
11 A 558 533        
12 A 282 270        

Unscaled Zero Point Vibrational Energy (zpe) 10017.5 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 9564.7 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 MP4/6-31G*
ABC
2.39627 0.37233 0.32298

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.158 0.394 0.002
O2 1.206 -0.247 0.007
N3 -1.094 -0.161 -0.045
H4 0.129 1.503 -0.001
H5 -1.166 -1.163 0.091
H6 -1.909 0.403 0.161

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.22831.37021.10972.04602.0736
O21.22832.30222.05512.54463.1862
N31.37022.30222.06521.01421.0123
H41.10972.05512.06522.96552.3218
H52.04602.54461.01422.96551.7345
H62.07363.18621.01232.32181.7345

picture of formamide state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 117.421 C1 N3 H6 120.255
O2 C1 N3 124.655 O2 C1 H4 122.963
N3 C1 H4 112.347 H5 N3 H6 117.723
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability