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All results from a given calculation for CHONH2 (formamide)

using model chemistry: MP2=FULL/3-21G*

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/3-21G*
 hartrees
Energy at 0K-168.309388
Energy at 298.15K-168.313328
HF Energy-167.981488
Nuclear repulsion energy69.941365
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/3-21G*
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' 3703 3510 33.12      
2 A' 3563 3378 40.38      
3 A' 3000 2844 115.64      
4 A' 1738 1647 237.19      
5 A' 1697 1609 19.55      
6 A' 1476 1399 10.01      
7 A' 1272 1206 108.92      
8 A' 1062 1007 11.02      
9 A' 572 542 8.94      
10 A" 1089 1032 0.07      
11 A" 650 616 98.80      
12 A" 426 404 300.18      

Unscaled Zero Point Vibrational Energy (zpe) 10123.7 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 9597.2 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/3-21G*
ABC
2.42344 0.36197 0.31493

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.423 0.000
O2 1.232 0.225 0.000
N3 -0.967 -0.558 0.000
H4 -0.451 1.428 0.000
H5 -0.686 -1.531 0.000
H6 -1.952 -0.331 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.24791.37741.10152.07122.0923
O21.24792.33442.06882.60103.2320
N31.37742.33442.05161.01281.0105
H41.10152.06882.05162.96832.3120
H52.07122.60101.01282.96831.7438
H62.09233.23201.01052.31201.7438

picture of formamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 119.329 C1 N3 H6 121.624
O2 C1 N3 125.470 O2 C1 H4 123.302
N3 C1 H4 111.227 H5 N3 H6 119.048
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (Non-Planar)

Jump to S1C1
Energy calculated at MP2=FULL/3-21G*
 hartrees
Energy at 0K-168.309388
Energy at 298.15K-168.313328
HF Energy-167.981485
Nuclear repulsion energy69.944098
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/3-21G*
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 3703 3510 33.22      
2 A 3563 3377 40.35      
3 A 3000 2844 115.63      
4 A 1738 1647 236.96      
5 A 1697 1609 19.76      
6 A 1475 1399 10.09      
7 A 1273 1206 108.75      
8 A 1089 1032 0.07      
9 A 1063 1007 10.89      
10 A 651 617 99.13      
11 A 572 542 8.97      
12 A 426 404 299.83      

Unscaled Zero Point Vibrational Energy (zpe) 10124.0 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 9597.6 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 MP2=FULL/3-21G*
ABC
2.42298 0.36205 0.31499

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.155 0.393 -0.000
O2 1.229 -0.244 0.000
N3 -1.104 -0.163 -0.000
H4 0.106 1.494 -0.000
H5 -1.201 -1.171 0.000
H6 -1.937 0.410 0.001

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.24801.37711.10152.07062.0922
O21.24802.33412.06892.60013.2320
N31.37712.33412.05161.01291.0105
H41.10152.06892.05162.96812.3124
H52.07062.60011.01292.96811.7440
H62.09223.23201.01052.31241.7440

picture of formamide state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 119.289 C1 N3 H6 121.639
O2 C1 N3 125.461 O2 C1 H4 123.292
N3 C1 H4 111.247 H5 N3 H6 119.072
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability