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All results from a given calculation for CHONH2 (formamide)

using model chemistry: CCSD=FULL/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 CCSD=FULL/6-31G*
 hartrees
Energy at 0K-169.421166
Energy at 298.15K 
HF Energy-168.928724
Nuclear repulsion energy71.020587
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 CCSD=FULL/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' 3762 3573 45.92      
2 A' 3629 3446 50.10      
3 A' 3030 2877 93.25      
4 A' 1866 1772 368.79      
5 A' 1660 1576 75.13      
6 A' 1460 1387 5.14      
7 A' 1310 1245 112.28      
8 A' 1083 1028 4.08      
9 A' 572 544 12.83      
10 A" 1065 1011 0.14      
11 A" 644 612 21.63      
12 A" 181i 172i 305.21      

Unscaled Zero Point Vibrational Energy (zpe) 9949.5 cm-1
Scaled (by 0.9498) Zero Point Vibrational Energy (zpe) 9450.0 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 CCSD=FULL/6-31G*
ABC
2.43932 0.37693 0.32648

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.421 0.000
O2 1.202 0.228 0.000
N3 -0.943 -0.559 0.000
H4 -0.443 1.435 0.000
H5 -0.646 -1.526 0.000
H6 -1.930 -0.349 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.21791.36051.10592.05132.0776
O21.21792.28542.04022.54803.1847
N31.36052.28542.05581.01091.0087
H41.10592.04022.05582.96732.3220
H52.05132.54801.01092.96731.7414
H62.07763.18471.00872.32201.7414

picture of formamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 119.030 C1 N3 H6 121.839
O2 C1 N3 124.757 O2 C1 H4 122.723
N3 C1 H4 112.520 H5 N3 H6 119.131
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (Non-Planar)

Jump to S1C1
Energy calculated at CCSD=FULL/6-31G*
 hartrees
Energy at 0K-169.421218
Energy at 298.15K-169.424954
HF Energy-168.928607
Nuclear repulsion energy70.989780
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 CCSD=FULL/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 3745 3557 40.38      
2 A 3616 3435 43.27      
3 A 3031 2879 91.66      
4 A 1867 1773 351.56      
5 A 1665 1581 70.23      
6 A 1461 1388 4.60      
7 A 1310 1244 108.15      
8 A 1095 1040 4.73      
9 A 1060 1007 0.52      
10 A 636 604 38.44      
11 A 572 543 12.67      
12 A 253 240 311.54      

Unscaled Zero Point Vibrational Energy (zpe) 10154.9 cm-1
Scaled (by 0.9498) Zero Point Vibrational Energy (zpe) 9645.1 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 CCSD=FULL/6-31G*
ABC
2.42360 0.37678 0.32668

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.160 0.390 0.001
O2 1.198 -0.247 0.006
N3 -1.088 -0.158 -0.041
H4 0.139 1.496 -0.000
H5 -1.167 -1.160 0.082
H6 -1.903 0.407 0.145

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.21751.36401.10582.04232.0689
O21.21752.28762.03932.53573.1724
N31.36402.28762.06001.01201.0098
H41.10582.03932.06002.96062.3192
H52.04232.53571.01202.96061.7326
H62.06893.17241.00982.31921.7326

picture of formamide state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 117.767 C1 N3 H6 120.543
O2 C1 N3 124.686 O2 C1 H4 122.674
N3 C1 H4 112.616 H5 N3 H6 117.958
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability