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All results from a given calculation for CHONH2 (formamide)

using model chemistry: QCISD/6-31+G**

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 QCISD/6-31+G**
 hartrees
Energy at 0K-169.454513
Energy at 298.15K 
HF Energy-168.946316
Nuclear repulsion energy70.910268
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 QCISD/6-31+G**
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' 3823 3614 52.22      
2 A' 3677 3476 50.40      
3 A' 3075 2907 86.98      
4 A' 1807 1708 457.65      
5 A' 1666 1575 51.41      
6 A' 1448 1369 7.14      
7 A' 1296 1226 128.92      
8 A' 1075 1017 6.03      
9 A' 570 539 11.25      
10 A" 1051 993 2.90      
11 A" 623 589 12.50      
12 A" 178i 168i 276.49      

Unscaled Zero Point Vibrational Energy (zpe) 9966.1 cm-1
Scaled (by 0.9454) Zero Point Vibrational Energy (zpe) 9421.9 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 QCISD/6-31+G**
ABC
2.43044 0.37549 0.32525

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.423 0.000
O2 1.207 0.220 0.000
N3 -0.948 -0.555 0.000
H4 -0.430 1.435 0.000
H5 -0.662 -1.520 0.000
H6 -1.928 -0.332 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.22421.36251.09952.05292.0706
O21.22422.29072.03862.55383.1833
N31.36252.29072.05681.00661.0044
H41.09952.03862.05682.96442.3170
H52.05292.55381.00662.96441.7358
H62.07063.18331.00442.31701.7358

picture of formamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 119.356 C1 N3 H6 121.298
O2 C1 N3 124.560 O2 C1 H4 122.556
N3 C1 H4 112.884 H5 N3 H6 119.346
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (Non-Planar)

Jump to S1C1
Energy calculated at QCISD/6-31+G**
 hartrees
Energy at 0K-169.454546
Energy at 298.15K-169.458262
HF Energy-168.946132
Nuclear repulsion energy70.895017
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 QCISD/6-31+G**
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 3812 3604 48.54      
2 A 3668 3468 45.88      
3 A 3075 2907 85.70      
4 A 1808 1709 443.23      
5 A 1667 1576 49.90      
6 A 1449 1370 6.49      
7 A 1297 1226 124.86      
8 A 1084 1024 6.86      
9 A 1050 992 2.25      
10 A 621 587 23.37      
11 A 570 539 10.64      
12 A 242 229 282.63      

Unscaled Zero Point Vibrational Energy (zpe) 10170.5 cm-1
Scaled (by 0.9454) Zero Point Vibrational Energy (zpe) 9615.2 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 QCISD/6-31+G**
ABC
2.42038 0.37548 0.32544

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.158 0.393 0.002
O2 1.201 -0.248 0.005
N3 -1.089 -0.160 -0.033
H4 0.140 1.492 0.001
H5 -1.174 -1.158 0.070
H6 -1.903 0.410 0.115

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.22401.36461.09942.04612.0647
O21.22402.29192.03812.54463.1753
N31.36462.29192.05941.00731.0052
H41.09942.03812.05942.95932.3150
H52.04612.54461.00732.95931.7303
H62.06473.17531.00522.31501.7303

picture of formamide state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 118.447 C1 N3 H6 120.459
O2 C1 N3 124.510 O2 C1 H4 122.518
N3 C1 H4 112.955 H5 N3 H6 118.580
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability