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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: MP2/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
1 2 no CS 1A'
1 3 no C2V 1A1

Conformer 1 (C2)

Jump to S1C2 S1C3
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-43.179692
Energy at 298.15K-43.185424
HF Energy-42.797981
Nuclear repulsion energy67.498654
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/CEP-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 3783 3655 42.68      
2 A 3628 3506 7.31      
3 A 1727 1669 274.31      
4 A 1652 1596 161.64      
5 A 1156 1117 2.47      
6 A 931 899 11.02      
7 A 465 449 8.56      
8 A 456 440 6.66      
9 A 206 199 56.43      
10 B 3781 3653 26.05      
11 B 3623 3501 66.01      
12 B 1678 1621 195.20      
13 B 1426 1378 333.38      
14 B 1032 997 20.34      
15 B 703 679 49.70      
16 B 548 530 198.46      
17 B 531 513 29.14      
18 B 413 399 578.28      

Unscaled Zero Point Vibrational Energy (zpe) 13868.1 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 13400.8 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 MP2/CEP-31G
ABC
0.34659 0.32721 0.16867

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.139
O2 0.000 0.000 1.420
N3 -0.018 1.193 -0.626
N4 0.018 -1.193 -0.626
H5 0.000 2.066 -0.103
H6 0.219 1.209 -1.615
H7 0.000 -2.066 -0.103
H8 -0.219 -1.209 -1.615

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.28131.41691.41692.08042.14172.08042.1417
O21.28132.36812.36812.56703.27462.56703.2746
N31.41692.36812.38621.01791.01773.30102.6060
N41.41692.36812.38623.30102.60601.01791.0177
H52.08042.56701.01793.30101.75184.13263.6146
H62.14173.27461.01772.60601.75183.61462.4582
H72.08042.56703.30101.01794.13263.61461.7518
H82.14173.27462.60601.01773.61462.45821.7518

picture of Urea state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 116.435 C1 N3 H6 122.351
C1 N4 H7 116.435 C1 N4 H8 122.351
O2 C1 N3 122.643 O2 C1 N4 122.643
N3 C1 N4 114.714 H5 N3 H6 118.754
H7 N4 H8 118.754
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-43.179609
Energy at 298.15K 
HF Energy-42.798744
Nuclear repulsion energy67.520025
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/CEP-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' 3795 3667 47.19      
2 A' 3638 3515 8.21      
3 A' 1727 1669 282.66      
4 A' 1652 1596 176.95      
5 A' 1153 1114 2.19      
6 A' 933 902 12.01      
7 A' 702 679 23.48      
8 A' 547 529 109.78      
9 A' 465 449 2.42      
10 A' 361 349 760.74      
11 A" 3792 3664 27.35      
12 A" 3633 3510 71.86      
13 A" 1676 1619 198.81      
14 A" 1429 1381 351.69      
15 A" 1018 984 17.47      
16 A" 533 515 12.26      
17 A" 411 397 0.00      
18 A" 152i 147i 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 13655.9 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 13195.7 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/CEP-31G
ABC
0.34791 0.32703 0.16857

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.137 0.000
O2 -0.001 1.419 0.000
N3 0.000 -0.621 1.194
N4 0.000 -0.621 -1.194
H5 0.000 -0.102 2.069
H6 0.001 -1.637 1.216
H7 0.000 -0.102 -2.069
H8 0.001 -1.637 -1.216

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.28231.41421.41422.08272.15102.08272.1510
O21.28232.36372.36372.56793.28952.56793.2895
N31.41422.36372.38831.01711.01673.30412.6161
N41.41422.36372.38833.30412.61611.01711.0167
H52.08272.56791.01713.30411.75614.13793.6264
H62.15103.28951.01672.61611.75613.62642.4328
H72.08272.56793.30411.01714.13793.62641.7561
H82.15103.28952.61611.01673.62642.43281.7561

picture of Urea state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 116.937 C1 N3 H6 123.645
C1 N4 H7 116.937 C1 N4 H8 123.645
O2 C1 N3 122.391 O2 C1 N4 122.391
N3 C1 N4 115.218 H5 N3 H6 119.417
H7 N4 H8 119.417
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-43.179609
Energy at 298.15K 
HF Energy-42.798737
Nuclear repulsion energy67.517496
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/CEP-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 A1 3795 3667 47.14      
2 A1 3638 3516 8.15      
3 A1 1727 1669 284.55      
4 A1 1652 1597 175.20      
5 A1 1153 1114 2.14      
6 A1 933 901 12.09      
7 A1 464 449 2.42      
8 A2 410 396 0.00      
9 A2 154i 149i 0.00      
10 B1 702 678 23.38      
11 B1 547 528 108.73      
12 B1 360 348 762.10      
13 B2 3793 3665 27.38      
14 B2 3633 3511 71.91      
15 B2 1676 1619 198.31      
16 B2 1428 1380 351.79      
17 B2 1018 984 17.58      
18 B2 533 515 12.25      

Unscaled Zero Point Vibrational Energy (zpe) 13653.3 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 13193.2 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/CEP-31G
ABC
0.34792 0.32695 0.16855

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.137
O2 0.000 0.000 1.419
N3 0.000 1.194 -0.621
N4 0.000 -1.194 -0.621
H5 0.000 2.069 -0.102
H6 0.000 1.216 -1.637
H7 0.000 -2.069 -0.102
H8 0.000 -1.216 -1.637

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.28211.41441.41442.08312.15092.08312.1509
O21.28212.36382.36382.56843.28932.56843.2893
N31.41442.36382.38871.01711.01673.30462.6158
N41.41442.36382.38873.30462.61581.01711.0167
H52.08312.56841.01713.30461.75624.13873.6261
H62.15093.28931.01672.61581.75623.62612.4318
H72.08312.56843.30461.01714.13873.62611.7562
H82.15093.28932.61581.01673.62612.43181.7562

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 116.961 C1 N3 H6 123.609
C1 N4 H7 116.961 C1 N4 H8 123.609
O2 C1 N3 122.393 O2 C1 N4 122.393
N3 C1 N4 115.213 H5 N3 H6 119.430
H7 N4 H8 119.430
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability