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All results from a given calculation for CHONH2 (formamide)

using model chemistry: MP2/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes Planar 1A'
1 2 no Non-Planar 1A

Conformer 1 (Planar)

Jump to S1C2
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-32.825635
Energy at 298.15K-32.829536
HF Energy-32.534013
Nuclear repulsion energy38.909591
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 MP2/CEP-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' 3770 3643 34.51      
2 A' 3608 3487 43.82      
3 A' 3064 2961 113.56      
4 A' 1697 1640 264.89      
5 A' 1627 1572 109.32      
6 A' 1389 1342 20.33      
7 A' 1260 1217 123.96      
8 A' 1046 1010 13.25      
9 A' 538 519 10.17      
10 A" 987 954 11.75      
11 A" 630 609 129.91      
12 A" 452 437 322.42      

Unscaled Zero Point Vibrational Energy (zpe) 10033.4 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 9695.3 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 MP2/CEP-31G
ABC
2.29045 0.35103 0.30438

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.440 0.000
O2 1.256 0.203 0.000
N3 -0.992 -0.555 0.000
H4 -0.414 1.472 0.000
H5 -0.713 -1.536 0.000
H6 -1.981 -0.316 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.27841.40461.11162.10082.1205
O21.27842.37182.09752.62653.2786
N31.40462.37182.10731.02041.0181
H41.11162.09752.10733.02292.3775
H52.10082.62651.02043.02291.7605
H62.12053.27861.01812.37751.7605

picture of formamide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 119.220 C1 N3 H6 121.331
O2 C1 N3 124.196 O2 C1 H4 122.564
N3 C1 H4 113.241 H5 N3 H6 119.449
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (Non-Planar)

Jump to S1C1
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-32.825635
Energy at 298.15K-32.829538
HF Energy-32.534005
Nuclear repulsion energy38.909746
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 MP2/CEP-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 3770 3643 34.50      
2 A 3608 3487 43.91      
3 A 3064 2960 113.45      
4 A 1697 1640 263.33      
5 A 1626 1572 111.03      
6 A 1389 1342 20.61      
7 A 1261 1218 123.49      
8 A 1046 1010 12.96      
9 A 987 954 11.80      
10 A 630 609 131.63      
11 A 538 519 10.19      
12 A 453 438 320.43      

Unscaled Zero Point Vibrational Energy (zpe) 10034.5 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 9696.3 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 MP2/CEP-31G
ABC
2.29108 0.35103 0.30439

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.155 0.412 0.000
O2 -1.247 -0.255 0.000
N3 1.124 -0.168 -0.000
H4 -0.134 1.523 -0.000
H5 1.210 -1.184 0.000
H6 1.965 0.405 0.001

Atom - Atom Distances (Å)
  C1 O2 N3 H4 H5 H6
C11.27871.40411.11162.10032.1207
O21.27872.37182.09742.62623.2790
N31.40412.37182.10731.02041.0181
H41.11162.09742.10733.02272.3785
H52.10032.62621.02043.02271.7601
H62.12073.27901.01812.37851.7601

picture of formamide state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 119.207 C1 N3 H6 121.395
O2 C1 N3 124.206 O2 C1 H4 122.523
N3 C1 H4 113.271 H5 N3 H6 119.399
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability