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

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 CS 1A'
1 2 yes C1 1A

Conformer 1 (CS)

Jump to S1C2
Energy calculated at QCISD/6-31G**
 hartrees
Energy at 0K-244.505596
Energy at 298.15K 
HF Energy-243.832106
Nuclear repulsion energy123.282485
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' 3894 3666 76.82      
2 A' 3876 3649 69.74      
3 A' 3732 3513 65.92      
4 A' 1891 1780 492.90      
5 A' 1671 1573 138.69      
6 A' 1487 1400 138.35      
7 A' 1268 1194 203.57      
8 A' 1109 1044 34.84      
9 A' 984 926 33.97      
10 A' 588 554 39.17      
11 A' 493 464 5.93      
12 A" 778 732 42.59      
13 A" 602 567 69.82      
14 A" 491 463 66.77      
15 A" 273i 257i 286.81      

Unscaled Zero Point Vibrational Energy (zpe) 11295.5 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 10633.6 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/6-31G**
ABC
0.38298 0.36226 0.18617

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 0.131 0.000
O2 -0.070 1.347 0.000
N3 1.142 -0.603 0.000
O4 -1.089 -0.690 0.000
H5 2.018 -0.118 0.000
H6 1.113 -1.604 0.000
H7 -1.851 -0.097 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 O4 H5 H6 H7
C11.21801.35721.36332.03332.06101.8648
O21.21802.29552.27682.55073.17902.2921
N31.35722.29552.23261.00121.00163.0354
O41.36332.27682.23263.15912.38440.9655
H52.03332.55071.00123.15911.73973.8690
H62.06103.17901.00162.38441.73973.3253
H71.86482.29213.03540.96553.86903.3253

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 118.333 C1 N3 H6 121.065
C1 O4 H7 105.124 O2 C1 N3 126.019
O2 C1 O4 123.680 N3 C1 O4 110.301
H5 N3 H6 120.602
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C1)

Jump to S1C1
Energy calculated at QCISD/6-31G**
 hartrees
Energy at 0K-244.505836
Energy at 298.15K-244.510694
HF Energy-243.831810
Nuclear repulsion energy123.213727
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 3893 3665 77.07      
2 A 3838 3614 54.06      
3 A 3704 3487 49.23      
4 A 1892 1782 462.70      
5 A 1678 1580 118.54      
6 A 1485 1398 140.65      
7 A 1273 1199 170.31      
8 A 1125 1059 68.24      
9 A 984 926 31.99      
10 A 779 733 61.43      
11 A 595 560 77.74      
12 A 584 550 60.87      
13 A 507 477 25.09      
14 A 471 444 19.28      
15 A 374 352 303.36      

Unscaled Zero Point Vibrational Energy (zpe) 11590.8 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 10911.6 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/6-31G**
ABC
0.38289 0.36106 0.18622

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 -0.041 0.124 -0.002
O2 -0.479 1.259 0.007
N3 1.278 -0.225 -0.058
O4 -0.825 -0.990 0.002
H5 1.933 0.507 0.150
H6 1.533 -1.165 0.184
H7 -1.733 -0.662 0.006

Atom - Atom Distances (Å)
  C1 O2 N3 O4 H5 H6 H7
C11.21691.36511.36222.01602.04321.8656
O21.21692.30092.27552.53083.15602.2936
N31.36512.30092.23821.00361.00403.0428
O41.36222.27552.23823.14092.37140.9656
H52.01602.53081.00363.14091.71953.8500
H62.04323.15601.00402.37141.71953.3095
H71.86562.29363.04280.96563.85003.3095

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 115.820 C1 N3 H6 118.379
C1 O4 H7 105.261 O2 C1 N3 125.935
O2 C1 O4 123.735 N3 C1 O4 110.302
H5 N3 H6 117.845
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability