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All results from a given calculation for CHONH2 (formamide)

using model chemistry: MP4=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 MP4=FULL/3-21G
 hartrees
Energy at 0K-168.334233
Energy at 298.15K-168.338142
HF Energy-167.980154
Nuclear repulsion energy69.673941
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=FULL/3-21G
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' 3653 3576        
2 A' 3517 3442        
3 A' 2913 2852        
4 A' 1707 1671        
5 A' 1663 1628        
6 A' 1431 1400        
7 A' 1250 1224        
8 A' 1039 1017        
9 A' 560 548        
10 A" 1061 1038        
11 A" 644 631        
12 A" 412 403        

Unscaled Zero Point Vibrational Energy (zpe) 9924.8 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 9714.4 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=FULL/3-21G
ABC
2.40203 0.35940 0.31262

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.425 0.000
O2 1.238 0.224 0.000
N3 -0.971 -0.558 0.000
H4 -0.457 1.434 0.000
H5 -0.691 -1.535 0.000
H6 -1.958 -0.330 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.25391.38131.10832.07752.0988
O21.25392.34272.08262.61023.2437
N31.38132.34272.05771.01551.0135
H41.10832.08262.05772.97822.3171
H52.07752.61021.01552.97821.7478
H62.09883.24371.01352.31711.7478

picture of formamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 119.390 C1 N3 H6 121.663
O2 C1 N3 125.431 O2 C1 H4 123.558
N3 C1 H4 111.011 H5 N3 H6 118.948
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (Non-Planar)

Jump to S1C1
Energy calculated at MP4=FULL/3-21G
 hartrees
Energy at 0K-168.334233
Energy at 298.15K-168.338141
HF Energy-167.980141
Nuclear repulsion energy69.675184
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=FULL/3-21G
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 3653 3576        
2 A 3516 3441        
3 A 2911 2850        
4 A 1707 1670        
5 A 1663 1627        
6 A 1431 1400        
7 A 1251 1224        
8 A 1061 1038        
9 A 1040 1017        
10 A 645 632        
11 A 560 548        
12 A 410 401        

Unscaled Zero Point Vibrational Energy (zpe) 9923.0 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 9712.7 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=FULL/3-21G
ABC
2.40082 0.35949 0.31267

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/3-21G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.155 0.395 0.000
O2 1.234 -0.245 -0.000
N3 -1.108 -0.164 -0.000
H4 0.100 1.503 0.000
H5 -1.203 -1.176 0.001
H6 -1.944 0.408 -0.001

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.25401.38121.10862.07632.0992
O21.25402.34252.08282.60803.2439
N31.38122.34252.05811.01561.0135
H41.10862.08282.05812.97782.3182
H52.07632.60801.01562.97781.7485
H62.09923.24391.01352.31821.7485

picture of formamide state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 119.276 C1 N3 H6 121.708
O2 C1 N3 125.409 O2 C1 H4 123.559
N3 C1 H4 111.031 H5 N3 H6 119.016
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability