return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: MP2=FULL/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 MP2=FULL/6-31G*
 hartrees
Energy at 0K-244.471244
Energy at 298.15K 
HF Energy-243.816466
Nuclear repulsion energy123.057862
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 MP2=FULL/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' 3811 3591 83.64      
2 A' 3748 3531 88.52      
3 A' 3672 3460 80.75      
4 A' 1899 1789 469.20      
5 A' 1656 1560 149.43      
6 A' 1477 1392 134.23      
7 A' 1259 1186 210.26      
8 A' 1104 1040 32.53      
9 A' 975 918 43.20      
10 A' 585 551 37.11      
11 A' 492 464 6.57      
12 A" 777 733 35.23      
13 A" 613 578 78.36      
14 A" 496 468 68.07      
15 A" 272i 256i 309.76      

Unscaled Zero Point Vibrational Energy (zpe) 11145.9 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 10501.7 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 MP2=FULL/6-31G*
ABC
0.38098 0.36230 0.18570

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.132 0.000
O2 -0.083 1.349 0.000
N3 1.146 -0.593 0.000
O4 -1.082 -0.704 0.000
H5 2.025 -0.101 0.000
H6 1.127 -1.600 0.000
H7 -1.854 -0.107 0.000

Atom - Atom Distances (Å)
  C1 O2 N3 O4 H5 H6 H7
C11.22021.35581.36682.03792.06591.8697
O21.22022.29822.28282.55833.18742.2931
N31.35582.29822.23061.00681.00713.0394
O41.36682.28282.23063.16422.38360.9759
H52.03792.55831.00683.16421.74693.8789
H62.06593.18741.00712.38361.74693.3339
H71.86972.29313.03940.97593.87893.3339

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 118.464 C1 N3 H6 121.214
C1 O4 H7 104.662 O2 C1 N3 126.206
O2 C1 O4 123.769 N3 C1 O4 110.025
H5 N3 H6 120.322
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C1)

Jump to S1C1
Energy calculated at MP2=FULL/6-31G*
 hartrees
Energy at 0K-244.471467
Energy at 298.15K-244.476318
HF Energy-243.816362
Nuclear repulsion energy122.999651
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 MP2=FULL/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 3780 3562 68.42      
2 A 3747 3530 89.71      
3 A 3648 3437 63.29      
4 A 1898 1788 441.86      
5 A 1667 1571 127.90      
6 A 1476 1391 140.18      
7 A 1264 1191 176.03      
8 A 1119 1054 66.40      
9 A 976 920 41.77      
10 A 778 733 51.53      
11 A 603 568 101.40      
12 A 585 551 41.78      
13 A 509 480 27.98      
14 A 474 447 19.99      
15 A 374 353 326.70      

Unscaled Zero Point Vibrational Energy (zpe) 11449.2 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 10787.4 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 MP2=FULL/6-31G*
ABC
0.38083 0.36131 0.18577

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.041 0.125 -0.001
O2 -0.490 1.259 0.007
N3 1.278 -0.216 -0.056
O4 -0.815 -1.000 0.002
H5 1.936 0.521 0.145
H6 1.544 -1.162 0.176
H7 -1.734 -0.670 0.005

Atom - Atom Distances (Å)
  C1 O2 N3 O4 H5 H6 H7
C11.21931.36291.36582.02122.04871.8706
O21.21932.30302.28172.53923.16582.2949
N31.36292.30302.23561.00881.00923.0461
O41.36582.28172.23563.14692.37090.9760
H52.02122.53921.00883.14691.72823.8607
H62.04873.16581.00922.37091.72823.3186
H71.87062.29493.04610.97603.86073.3186

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 116.102 C1 N3 H6 118.708
C1 O4 H7 104.804 O2 C1 N3 126.123
O2 C1 O4 123.822 N3 C1 O4 110.026
H5 N3 H6 117.828
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability