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All results from a given calculation for CHONH2 (formamide)

using model chemistry: MP2/6-31G*

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 MP2/6-31G*
 hartrees
Energy at 0K-169.394457
Energy at 298.15K 
HF Energy-168.928001
Nuclear repulsion energy70.839574
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 MP2/6-31G*
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' 3778 3562 55.54      
2 A' 3636 3428 56.98      
3 A' 3050 2876 100.39      
4 A' 1838 1733 332.00      
5 A' 1653 1559 66.02      
6 A' 1455 1372 4.54      
7 A' 1309 1234 100.12      
8 A' 1072 1011 3.88      
9 A' 566 534 11.39      
10 A" 1055 995 0.79      
11 A" 653 616 20.64      
12 A" 137i 129i 301.66      

Unscaled Zero Point Vibrational Energy (zpe) 9963.3 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 9395.4 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 MP2/6-31G*
ABC
2.42969 0.37486 0.32476

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.420 0.000
O2 1.208 0.235 0.000
N3 -0.946 -0.564 0.000
H4 -0.457 1.429 0.000
H5 -0.649 -1.531 0.000
H6 -1.933 -0.355 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.22151.36471.10772.05552.0828
O21.22152.29702.04802.56223.1958
N31.36472.29702.05211.01131.0091
H41.10772.04802.05212.96592.3159
H52.05552.56221.01132.96591.7411
H62.08283.19581.00912.31591.7411

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 121.941
O2 C1 N3 125.196 O2 C1 H4 123.028
N3 C1 H4 111.776 H5 N3 H6 119.019
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (Non-Planar)

Jump to S1C1
Energy calculated at MP2/6-31G*
 hartrees
Energy at 0K-169.394473
Energy at 298.15K-169.398121
HF Energy-168.927956
Nuclear repulsion energy70.827275
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 MP2/6-31G*
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 3769 3555 52.39      
2 A 3629 3422 53.26      
3 A 3049 2875 99.65      
4 A 1837 1733 323.56      
5 A 1655 1561 64.09      
6 A 1456 1373 4.13      
7 A 1309 1234 99.32      
8 A 1080 1018 4.19      
9 A 1053 993 0.76      
10 A 648 611 29.09      
11 A 566 534 11.14      
12 A 191 180 305.23      

Unscaled Zero Point Vibrational Energy (zpe) 10121.4 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 9544.5 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 MP2/6-31G*
ABC
2.42154 0.37484 0.32491

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.158 0.392 0.001
O2 1.203 -0.246 0.004
N3 -1.088 -0.160 -0.030
H4 0.129 1.497 -0.001
H5 -1.169 -1.164 0.060
H6 -1.913 0.405 0.106

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.22471.36351.10472.04602.0741
O21.22472.29332.04702.54413.1854
N31.36352.29332.05611.01131.0091
H41.10472.04702.05612.96112.3185
H52.04602.54411.01132.96111.7372
H62.07413.18541.00912.31851.7372

picture of formamide state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 118.222 C1 N3 H6 121.175
O2 C1 N3 124.681 O2 C1 H4 122.909
N3 C1 H4 112.395 H5 N3 H6 118.597
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability