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All results from a given calculation for NH2COOH (Carbamic acid)

using model chemistry: QCISD/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no CS 1A'
1 2 yes C1 1A

Conformer 1 (CS)

Jump to S1C2
Energy calculated at QCISD/6-31+G**
 hartrees
Energy at 0K-244.525072
Energy at 298.15K 
HF Energy-243.841302
Nuclear repulsion energy123.095910
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/6-31+G**
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' 3875 3663 92.18      
2 A' 3856 3646 80.47      
3 A' 3712 3509 70.33      
4 A' 1846 1746 622.07      
5 A' 1666 1575 122.17      
6 A' 1464 1384 175.16      
7 A' 1256 1188 196.42      
8 A' 1105 1045 38.75      
9 A' 976 923 42.32      
10 A' 585 553 35.90      
11 A' 493 466 6.29      
12 A" 766 724 24.44      
13 A" 586 554 65.11      
14 A" 461 436 85.28      
15 A" 327i 310i 266.76      

Unscaled Zero Point Vibrational Energy (zpe) 11160.2 cm-1
Scaled (by 0.9454) Zero Point Vibrational Energy (zpe) 10550.8 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/6-31+G**
ABC
0.38215 0.36094 0.18562

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.129 0.000
O2 -0.076 1.348 0.000
N3 1.147 -0.597 0.000
O4 -1.088 -0.695 0.000
H5 2.022 -0.106 0.000
H6 1.126 -1.600 0.000
H7 -1.861 -0.113 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 O4 H5 H6 H7
C11.22111.35731.36452.03542.06331.8767
O21.22112.29732.27902.55273.18352.3064
N31.35732.29732.23721.00291.00333.0465
O41.36452.27902.23723.16502.39210.9669
H52.03542.55271.00293.16501.74173.8827
H62.06333.18351.00332.39211.74173.3365
H71.87672.30643.04650.96693.88273.3365

picture of Carbamic acid state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 118.390 C1 N3 H6 121.130
C1 O4 H7 105.946 O2 C1 N3 125.911
O2 C1 O4 123.531 N3 C1 O4 110.558
H5 N3 H6 120.480
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C1)

Jump to S1C1
Energy calculated at QCISD/6-31+G**
 hartrees
Energy at 0K-244.525393
Energy at 298.15K-244.530263
HF Energy-243.840915
Nuclear repulsion energy123.029945
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/6-31+G**
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 3873 3662 92.08      
2 A 3820 3612 64.48      
3 A 3685 3484 53.22      
4 A 1849 1748 580.56      
5 A 1675 1583 106.01      
6 A 1462 1382 171.01      
7 A 1263 1194 157.04      
8 A 1122 1060 77.79      
9 A 976 923 40.28      
10 A 772 730 43.42      
11 A 590 557 57.94      
12 A 572 541 73.92      
13 A 502 474 27.99      
14 A 460 435 21.73      
15 A 413 390 292.30      

Unscaled Zero Point Vibrational Energy (zpe) 11516.4 cm-1
Scaled (by 0.9454) Zero Point Vibrational Energy (zpe) 10887.6 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/6-31+G**
ABC
0.38216 0.35969 0.18567

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.038 0.123 -0.001
O2 -0.466 1.265 0.007
N3 1.277 -0.237 -0.058
O4 -0.838 -0.982 0.003
H5 1.941 0.489 0.152
H6 1.527 -1.182 0.178
H7 -1.748 -0.654 0.002

Atom - Atom Distances (Å)
  C1 O2 N3 O4 H5 H6 H7
C11.21991.36531.36342.01842.04571.8775
O21.21992.30242.27752.53313.16102.3078
N31.36532.30242.24321.00521.00573.0542
O41.36342.27752.24323.14702.37930.9671
H52.01842.53311.00523.14701.72193.8642
H62.04573.16101.00572.37931.72193.3213
H71.87752.30783.05420.96713.86423.3213

picture of Carbamic acid state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 115.905 C1 N3 H6 118.479
C1 O4 H7 106.090 O2 C1 N3 125.802
O2 C1 O4 123.578 N3 C1 O4 110.587
H5 N3 H6 117.802
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability