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All results from a given calculation for CHONH2 (formamide)

using model chemistry: QCISD(T)/TZVP

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(T)/TZVP
 hartrees
Energy at 0K-169.546196
Energy at 298.15K 
HF Energy-168.995379
Nuclear repulsion energy71.030669
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(T)/TZVP
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' 3753 3615        
2 A' 3610 3477        
3 A' 2994 2884        
4 A' 1789 1723        
5 A' 1630 1570        
6 A' 1441 1388        
7 A' 1269 1222        
8 A' 1052 1013        
9 A' 568 547        
10 A" 1021 984        
11 A" 611 589        
12 A" 361i 348i        

Unscaled Zero Point Vibrational Energy (zpe) 9688.3 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 9331.8 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(T)/TZVP
ABC
2.44040 0.37662 0.32627

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.422 0.000
O2 1.202 0.232 0.000
N3 -0.942 -0.564 0.000
H4 -0.447 1.431 0.000
H5 -0.647 -1.527 0.000
H6 -1.924 -0.346 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.21681.36351.10362.05322.0714
O21.21682.28712.03902.55143.1787
N31.36352.28712.05481.00771.0054
H41.10362.03902.05482.96432.3099
H52.05322.55141.00772.96431.7398
H62.07143.17871.00542.30991.7398

picture of formamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 119.201 C1 N3 H6 121.207
O2 C1 N3 124.739 O2 C1 H4 122.900
N3 C1 H4 112.361 H5 N3 H6 119.592
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (Non-Planar)

Jump to S1C1
Energy calculated at QCISD(T)/TZVP
 hartrees
Energy at 0K-169.546602
Energy at 298.15K-169.550528
HF Energy-168.994846
Nuclear repulsion energy70.966292
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(T)/TZVP
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 3721 3584        
2 A 3587 3455        
3 A 2997 2887        
4 A 1793 1727        
5 A 1632 1572        
6 A 1445 1392        
7 A 1272 1225        
8 A 1073 1034        
9 A 1027 989        
10 A 613 590        
11 A 567 546        
12 A 435 419        

Unscaled Zero Point Vibrational Energy (zpe) 10080.6 cm-1
Scaled (by 0.9632) Zero Point Vibrational Energy (zpe) 9709.6 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 QCISD(T)/TZVP
ABC
2.41041 0.37610 0.32659

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/TZVP

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.162 0.391 0.003
O2 1.197 -0.248 0.008
N3 -1.093 -0.159 -0.059
H4 0.140 1.494 -0.001
H5 -1.161 -1.150 0.122
H6 -1.879 0.411 0.208

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.21561.37161.10342.03432.0518
O21.21562.29232.03682.52693.1521
N31.37162.29232.06321.00971.0076
H41.10342.03682.06322.94932.3009
H52.03432.52691.00972.94931.7210
H62.05183.15211.00762.30091.7210

picture of formamide state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 116.541 C1 N3 H6 118.368
O2 C1 N3 124.640 O2 C1 H4 122.809
N3 C1 H4 112.491 H5 N3 H6 117.103
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability