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

using model chemistry: MP4/6-31G*

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 MP4/6-31G*
 hartrees
Energy at 0K-244.495116
Energy at 298.15K 
HF Energy-243.815205
Nuclear repulsion energy122.615763
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 MP4/6-31G*
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' 3776 3606        
2 A' 3725 3557        
3 A' 3640 3476        
4 A' 1862 1778        
5 A' 1644 1569        
6 A' 1463 1397        
7 A' 1255 1198        
8 A' 1092 1043        
9 A' 956 913        
10 A' 575 549        
11 A' 484 462        
12 A" 757 723        
13 A" 604 577        
14 A" 487 465        
15 A" 329i 314i        

Unscaled Zero Point Vibrational Energy (zpe) 10995.4 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 10498.4 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 MP4/6-31G*
ABC
0.37777 0.35992 0.18432

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.133 0.000
O2 -0.086 1.355 0.000
N3 1.151 -0.593 0.000
O4 -1.084 -0.709 0.000
H5 2.031 -0.100 0.000
H6 1.132 -1.602 0.000
H7 -1.859 -0.114 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 O4 H5 H6 H7
C11.22501.36071.37252.04422.07201.8753
O21.22502.30762.29252.56883.19842.3028
N31.36072.30762.23761.00881.00943.0475
O41.37252.29252.23763.17372.38940.9767
H52.04422.56881.00883.17371.75043.8898
H62.07203.19841.00942.38941.75043.3408
H71.87532.30283.04750.97673.88983.3408

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 118.496 C1 N3 H6 121.202
C1 O4 H7 104.672 O2 C1 N3 126.279
O2 C1 O4 123.813 N3 C1 O4 109.908
H5 N3 H6 120.302
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C1)

Jump to S1C1
Energy calculated at MP4/6-31G*
 hartrees
Energy at 0K-244.495591
Energy at 298.15K-244.500463
HF Energy-243.814869
Nuclear repulsion energy122.511767
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 MP4/6-31G*
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 3727 3559        
2 A 3721 3553        
3 A 3603 3440        
4 A 1860 1776        
5 A 1660 1585        
6 A 1462 1395        
7 A 1262 1205        
8 A 1114 1063        
9 A 956 913        
10 A 759 725        
11 A 591 565        
12 A 575 549        
13 A 502 480        
14 A 472 450        
15 A 430 411        

Unscaled Zero Point Vibrational Energy (zpe) 11347.0 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 10834.1 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 MP4/6-31G*
ABC
0.37783 0.35800 0.18434

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.041 0.126 -0.001
O2 -0.491 1.264 0.008
N3 1.285 -0.219 -0.067
O4 -0.820 -1.003 0.003
H5 1.933 0.520 0.173
H6 1.541 -1.158 0.211
H7 -1.739 -0.672 0.004

Atom - Atom Distances (Å)
  C1 O2 N3 O4 H5 H6 H7
C11.22391.37171.37082.02102.04831.8754
O21.22392.31472.29022.54123.16782.3027
N31.37172.31472.24691.01201.01253.0583
O41.37082.29022.24693.15062.37470.9771
H52.02102.54121.01203.15061.72393.8643
H62.04833.16781.01252.37471.72393.3220
H71.87542.30273.05830.97713.86433.3220

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 115.121 C1 N3 H6 117.644
C1 O4 H7 104.783 O2 C1 N3 126.099
O2 C1 O4 123.830 N3 C1 O4 110.028
H5 N3 H6 116.752
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability