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

using model chemistry: QCISD(T)/6-31G*

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(T)/6-31G*
 hartrees
Energy at 0K-244.492297
Energy at 298.15K 
HF Energy-243.815920
Nuclear repulsion energy122.828737
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)/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' 3771 3617        
2 A' 3725 3573        
3 A' 3637 3489        
4 A' 1877 1801        
5 A' 1645 1578        
6 A' 1473 1414        
7 A' 1263 1212        
8 A' 1098 1054        
9 A' 967 927        
10 A' 581 557        
11 A' 486 466        
12 A" 764 733        
13 A" 603 578        
14 A" 487 467        
15 A" 324i 311i        

Unscaled Zero Point Vibrational Energy (zpe) 11026.6 cm-1
Scaled (by 0.9593) Zero Point Vibrational Energy (zpe) 10577.8 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(T)/6-31G*
ABC
0.38006 0.36041 0.18499

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.132 0.000
O2 -0.081 1.351 0.000
N3 1.148 -0.596 0.000
O4 -1.086 -0.701 0.000
H5 2.029 -0.105 0.000
H6 1.127 -1.605 0.000
H7 -1.858 -0.104 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 O4 H5 H6 H7
C11.22131.35971.36922.04302.07101.8733
O21.22132.30232.28542.56313.19332.2969
N31.35972.30232.23691.00891.00943.0467
O41.36922.28542.23693.17212.39060.9766
H52.04302.56311.00893.17211.75113.8876
H62.07103.19331.00942.39061.75113.3418
H71.87332.29693.04670.97663.88763.3418

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 118.457 C1 N3 H6 121.182
C1 O4 H7 104.745 O2 C1 N3 126.171
O2 C1 O4 123.720 N3 C1 O4 110.109
H5 N3 H6 120.360
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C1)

Jump to S1C1
Energy calculated at QCISD(T)/6-31G*
 hartrees
Energy at 0K-244.492751
Energy at 298.15K-244.497628
HF Energy-243.815619
Nuclear repulsion energy122.731516
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)/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 3723 3572        
2 A 3721 3570        
3 A 3600 3454        
4 A 1877 1801        
5 A 1661 1594        
6 A 1472 1412        
7 A 1270 1219        
8 A 1119 1074        
9 A 967 928        
10 A 766 735        
11 A 592 568        
12 A 579 555        
13 A 503 483        
14 A 470 451        
15 A 425 408        

Unscaled Zero Point Vibrational Energy (zpe) 11373.6 cm-1
Scaled (by 0.9593) Zero Point Vibrational Energy (zpe) 10910.7 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)/6-31G*
ABC
0.38001 0.35868 0.18502

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.041 0.125 -0.001
O2 -0.483 1.262 0.008
N3 1.283 -0.224 -0.066
O4 -0.824 -0.996 0.003
H5 1.934 0.513 0.171
H6 1.535 -1.165 0.209
H7 -1.742 -0.661 0.005

Atom - Atom Distances (Å)
  C1 O2 N3 O4 H5 H6 H7
C11.22011.37051.36752.02022.04771.8739
O21.22012.30942.28352.53603.16332.2983
N31.37052.30942.24511.01201.01253.0571
O41.36752.28352.24513.14872.37470.9769
H52.02022.53601.01203.14871.72543.8626
H62.04773.16331.01252.37471.72543.3222
H71.87392.29833.05710.97693.86263.3222

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 115.151 C1 N3 H6 117.688
C1 O4 H7 104.902 O2 C1 N3 126.007
O2 C1 O4 123.786 N3 C1 O4 110.167
H5 N3 H6 116.913
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability