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All results from a given calculation for CHONH2 (formamide)

using model chemistry: QCISD/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 QCISD/6-31G**
 hartrees
Energy at 0K-169.439968
Energy at 298.15K 
HF Energy-168.938541
Nuclear repulsion energy71.014958
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/6-31G**
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' 3841 3616 44.51      
2 A' 3696 3479 46.61      
3 A' 3056 2876 101.19      
4 A' 1849 1740 356.35      
5 A' 1667 1570 61.17      
6 A' 1463 1377 5.47      
7 A' 1304 1228 110.01      
8 A' 1077 1014 4.07      
9 A' 569 535 12.73      
10 A" 1066 1004 0.06      
11 A" 642 605 20.37      
12 A" 148i 139i 280.23      

Unscaled Zero Point Vibrational Energy (zpe) 10040.8 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 9452.5 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 QCISD/6-31G**
ABC
2.44371 0.37622 0.32603

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.422 0.000
O2 1.205 0.226 0.000
N3 -0.945 -0.558 0.000
H4 -0.444 1.430 0.000
H5 -0.650 -1.519 0.000
H6 -1.925 -0.344 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.22051.36191.10122.04652.0718
O21.22052.28862.04112.54623.1811
N31.36192.28862.05051.00481.0028
H41.10122.04112.05052.95582.3110
H52.04652.54621.00482.95581.7338
H62.07183.18111.00282.31101.7338

picture of formamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 118.930 C1 N3 H6 121.618
O2 C1 N3 124.724 O2 C1 H4 122.996
N3 C1 H4 112.280 H5 N3 H6 119.452
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (Non-Planar)

Jump to S1C1
Energy calculated at QCISD/6-31G**
 hartrees
Energy at 0K-169.439992
Energy at 298.15K-169.443667
HF Energy-168.938416
Nuclear repulsion energy70.996406
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/6-31G**
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 3830 3605 40.73      
2 A 3687 3471 42.08      
3 A 3056 2877 100.00      
4 A 1849 1740 345.00      
5 A 1669 1571 58.78      
6 A 1463 1377 5.03      
7 A 1304 1228 107.09      
8 A 1087 1023 4.33      
9 A 1062 999 0.61      
10 A 636 599 30.91      
11 A 568 535 12.27      
12 A 207 194 285.74      

Unscaled Zero Point Vibrational Energy (zpe) 10208.4 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 9610.1 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/6-31G**
ABC
2.43267 0.37618 0.32621

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.159 0.391 0.001
O2 1.200 -0.246 0.005
N3 -1.088 -0.160 -0.034
H4 0.132 1.492 0.000
H5 -1.167 -1.157 0.068
H6 -1.903 0.406 0.119

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.22031.36411.10122.04002.0658
O21.22032.28992.04042.53713.1726
N31.36412.28992.05351.00561.0035
H41.10122.04042.05352.95112.3095
H52.04002.53711.00562.95111.7278
H62.06583.17261.00352.30951.7278

picture of formamide state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 118.035 C1 N3 H6 120.742
O2 C1 N3 124.667 O2 C1 H4 122.945
N3 C1 H4 112.371 H5 N3 H6 118.627
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability