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All results from a given calculation for CHONH2 (formamide)

using model chemistry: QCISD(T)/cc-pVTZ

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)/cc-pVTZ
 hartrees
Energy at 0K-169.642587
Energy at 298.15K 
HF Energy-169.001079
Nuclear repulsion energy71.152600
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)/cc-pVTZ
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' 3759 3566        
2 A' 3614 3429        
3 A' 2980 2827        
4 A' 1802 1710        
5 A' 1618 1535        
6 A' 1424 1351        
7 A' 1276 1210        
8 A' 1051 997        
9 A' 563 534        
10 A" 1050 996        
11 A" 637 605        
12 A" 133i 126i        

Unscaled Zero Point Vibrational Energy (zpe) 9820.4 cm-1
Scaled (by 0.9486) Zero Point Vibrational Energy (zpe) 9315.6 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)/cc-pVTZ
ABC
2.45561 0.37749 0.32719

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.420 0.000
O2 1.200 0.233 0.000
N3 -0.941 -0.563 0.000
H4 -0.450 1.427 0.000
H5 -0.646 -1.524 0.000
H6 -1.919 -0.343 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.21471.36101.10272.04892.0653
O21.21472.28472.03662.54943.1723
N31.36102.28472.04961.00511.0025
H41.10272.03662.04962.95742.3001
H52.04892.54941.00512.95741.7363
H62.06533.17231.00252.30011.7363

picture of formamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 119.211 C1 N3 H6 121.068
O2 C1 N3 124.906 O2 C1 H4 122.928
N3 C1 H4 112.166 H5 N3 H6 119.721
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (Non-Planar)

Jump to S1C1
Energy calculated at QCISD(T)/cc-pVTZ
 hartrees
Energy at 0K-169.642608
Energy at 298.15K-169.646268
HF Energy-169.000997
Nuclear repulsion energy71.127540
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)/cc-pVTZ
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 3748 3556        
2 A 3607 3422        
3 A 2981 2828        
4 A 1803 1710        
5 A 1620 1537        
6 A 1424 1351        
7 A 1274 1209        
8 A 1062 1008        
9 A 1042 989        
10 A 630 597        
11 A 561 533        
12 A 201 191        

Unscaled Zero Point Vibrational Energy (zpe) 9976.8 cm-1
Scaled (by 0.9486) Zero Point Vibrational Energy (zpe) 9464.0 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)/cc-pVTZ
ABC
2.44512 0.37730 0.32726

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.161 0.388 0.001
O2 1.197 -0.246 0.005
N3 -1.087 -0.159 -0.033
H4 0.134 1.490 0.001
H5 -1.175 -1.156 0.070
H6 -1.895 0.417 0.116

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.21441.36381.10262.04332.0598
O21.21442.28642.03592.54193.1643
N31.36382.28642.05271.00581.0033
H41.10262.03592.05272.95312.2983
H52.04332.54191.00582.95311.7300
H62.05983.16431.00332.29831.7300

picture of formamide state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 118.376 C1 N3 H6 120.195
O2 C1 N3 124.858 O2 C1 H4 122.895
N3 C1 H4 112.231 H5 N3 H6 118.876
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability