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

using model chemistry: CISD/3-21G*

19 10 17 12 22

States and conformations

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

Conformer 1 (CS)

Jump to S1C2
Energy calculated at CISD/3-21G*
 hartrees
Energy at 0K-242.853195
Energy at 298.15K-242.858178
HF Energy-242.458003
Nuclear repulsion energy122.218951
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 CISD/3-21G*
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' 3800 3551 62.95      
2 A' 3696 3454 34.00      
3 A' 3671 3430 72.76      
4 A' 1862 1740 432.42      
5 A' 1729 1615 93.24      
6 A' 1503 1404 126.39      
7 A' 1259 1176 207.84      
8 A' 1119 1046 81.23      
9 A' 953 890 49.62      
10 A' 595 556 39.59      
11 A' 498 465 8.80      
12 A" 795 743 137.04      
13 A" 600 561 108.26      
14 A" 498 465 215.49      
15 A" 487 455 211.17      

Unscaled Zero Point Vibrational Energy (zpe) 11531.8 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 10775.3 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 CISD/3-21G*
ABC
0.37411 0.35827 0.18301

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.141 0.000
O2 -0.202 1.350 0.000
N3 1.198 -0.497 0.000
O4 -1.022 -0.800 0.000
H5 2.043 0.044 0.000
H6 1.236 -1.501 0.000
H7 -1.877 -0.318 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 O4 H5 H6 H7
C11.22561.35721.38912.04572.05541.9324
O21.22562.31752.30102.59713.19302.3641
N31.35722.31752.23991.00421.00443.0800
O41.38912.30102.23993.17922.36420.9819
H52.04572.59711.00423.17921.74333.9371
H62.05543.19301.00442.36421.74333.3305
H71.93242.36413.08000.98193.93713.3305

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 119.308 C1 N3 H6 120.255
C1 O4 H7 107.943 O2 C1 N3 127.529
O2 C1 O4 123.180 N3 C1 O4 109.291
H5 N3 H6 120.438
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C1)

Jump to S1C1
Energy calculated at CISD/3-21G*
 hartrees
Energy at 0K-242.853195
Energy at 298.15K-242.858176
HF Energy-242.458000
Nuclear repulsion energy122.213122
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 CISD/3-21G*
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 3800 3551 62.95      
2 A 3697 3455 34.22      
3 A 3671 3430 72.50      
4 A 1864 1741 432.40      
5 A 1729 1616 93.30      
6 A 1502 1404 126.27      
7 A 1258 1176 207.21      
8 A 1119 1046 81.22      
9 A 952 889 50.36      
10 A 795 743 136.87      
11 A 600 560 108.39      
12 A 595 556 39.56      
13 A 498 465 19.44      
14 A 497 464 224.37      
15 A 487 455 191.68      

Unscaled Zero Point Vibrational Energy (zpe) 11531.0 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 10774.6 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 CISD/3-21G*
ABC
0.37404 0.35824 0.18298

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/3-21G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.031 0.138 -0.000
O2 0.497 1.272 0.000
N3 -1.278 -0.218 -0.000
O4 0.818 -1.007 0.000
H5 -1.983 0.498 0.001
H6 -1.539 -1.188 0.001
H7 1.760 -0.727 -0.000

Atom - Atom Distances (Å)
  C1 O2 N3 O4 H5 H6 H7
C11.22531.35721.38962.04582.05541.9329
O21.22532.31742.30122.59753.19292.3643
N31.35722.31742.24021.00421.00443.0802
O41.38962.30122.24023.17972.36430.9819
H52.04582.59751.00423.17971.74313.9377
H62.05543.19291.00442.36431.74313.3306
H71.93292.36433.08020.98193.93773.3306

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 119.327 C1 N3 H6 120.262
C1 O4 H7 107.948 O2 C1 N3 127.549
O2 C1 O4 123.168 N3 C1 O4 109.283
H5 N3 H6 120.411
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability