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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: MP2/CEP-121G

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-121G
 hartrees
Energy at 0K-43.232543
Energy at 298.15K-43.238519
HF Energy-42.805567
Nuclear repulsion energy67.799208
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-121G
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 3715 3626 32.35      
2 A 3561 3476 5.51      
3 A 1731 1689 202.02      
4 A 1652 1612 213.88      
5 A 1168 1140 7.01      
6 A 920 898 8.40      
7 A 501 489 53.13      
8 A 464 453 3.10      
9 A 319 312 85.03      
10 B 3713 3624 21.81      
11 B 3557 3471 49.14      
12 B 1691 1651 173.52      
13 B 1415 1381 298.47      
14 B 1056 1031 29.00      
15 B 699 682 69.11      
16 B 547 534 245.77      
17 B 527 514 63.42      
18 B 437 426 321.43      

Unscaled Zero Point Vibrational Energy (zpe) 13836.4 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 13504.4 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/CEP-121G
ABC
0.34851 0.33040 0.17040

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

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 1.414
N3 -0.034 1.186 -0.628
N4 0.034 -1.186 -0.628
H5 0.000 2.053 -0.102
H6 0.316 1.196 -1.579
H7 0.000 -2.053 -0.102
H8 -0.316 -1.196 -1.579

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.27501.41321.41322.06702.11762.06702.1176
O21.27502.36212.36212.55243.23932.55243.2393
N31.41322.36212.37351.01401.01383.28162.5806
N41.41322.36212.37353.28162.58061.01401.0138
H52.06702.55241.01403.28161.73644.10573.5827
H62.11763.23931.01382.58061.73643.58272.4739
H72.06702.55243.28161.01404.10573.58271.7364
H82.11763.23932.58061.01383.58272.47391.7364

picture of Urea state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 115.795 C1 N3 H6 120.618
C1 N4 H7 115.795 C1 N4 H8 120.618
O2 C1 N3 122.885 O2 C1 N4 122.885
N3 C1 N4 114.230 H5 N3 H6 117.807
H7 N4 H8 117.807
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Energy calculated at MP2/CEP-121G
 hartrees
Energy at 0K-43.231983
Energy at 298.15K 
HF Energy-42.807221
Nuclear repulsion energy67.862051
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-121G
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' 3745 3655 39.31      
2 A' 3586 3500 7.07      
3 A' 1733 1691 213.05      
4 A' 1652 1612 257.92      
5 A' 1160 1132 5.18      
6 A' 926 904 11.81      
7 A' 687 671 8.98      
8 A' 528 516 69.39      
9 A' 467 455 2.21      
10 A' 247 241 704.98      
11 A" 3742 3652 25.38      
12 A" 3579 3493 60.89      
13 A" 1688 1647 177.80      
14 A" 1422 1388 339.88      
15 A" 1029 1004 23.35      
16 A" 531 519 12.77      
17 A" 362 354 0.00      
18 A" 275i 268i 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 13404.8 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 13083.1 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 MP2/CEP-121G
ABC
0.35138 0.33043 0.17029

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.000 0.136 0.000
O2 0.000 1.412 0.000
N3 -0.000 -0.618 1.188
N4 -0.000 -0.618 -1.188
H5 -0.000 -0.104 2.060
H6 -0.001 -1.629 1.207
H7 -0.000 -0.104 -2.060
H8 -0.001 -1.629 -1.207

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.27671.40661.40662.07392.13792.07392.1379
O21.27672.35192.35192.55803.27192.55803.2719
N31.40662.35192.37601.01191.01143.28842.6000
N41.40662.35192.37603.28842.60001.01191.0114
H52.07392.55801.01193.28841.74684.12013.6055
H62.13793.27191.01142.60001.74683.60552.4146
H72.07392.55803.28841.01194.12013.60551.7468
H82.13793.27192.60001.01143.60552.41461.7468

picture of Urea state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 117.141 C1 N3 H6 123.467
C1 N4 H7 117.141 C1 N4 H8 123.467
O2 C1 N3 122.373 O2 C1 N4 122.373
N3 C1 N4 115.254 H5 N3 H6 119.391
H7 N4 H8 119.391
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at MP2/CEP-121G
 hartrees
Energy at 0K-43.231983
Energy at 298.15K 
HF Energy-42.807210
Nuclear repulsion energy67.859346
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-121G
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 3745 3655 39.28      
2 A1 3586 3500 7.06      
3 A1 1733 1691 213.07      
4 A1 1652 1612 257.92      
5 A1 1160 1132 5.18      
6 A1 926 904 11.84      
7 A1 467 455 2.20      
8 A2 362 353 0.00      
9 A2 275i 269i 0.00      
10 B1 687 670 8.94      
11 B1 528 516 68.63      
12 B1 246 240 705.89      
13 B2 3742 3653 25.47      
14 B2 3580 3494 60.87      
15 B2 1688 1647 177.60      
16 B2 1422 1388 339.79      
17 B2 1029 1004 23.44      
18 B2 531 519 12.75      

Unscaled Zero Point Vibrational Energy (zpe) 13403.0 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 13081.3 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 MP2/CEP-121G
ABC
0.35135 0.33038 0.17027

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.136
O2 0.000 0.000 1.412
N3 0.000 1.188 -0.618
N4 0.000 -1.188 -0.618
H5 0.000 2.060 -0.104
H6 0.000 1.207 -1.629
H7 0.000 -2.060 -0.104
H8 0.000 -1.207 -1.629

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.27661.40681.40682.07422.13772.07422.1377
O21.27662.35202.35202.55843.27182.55843.2718
N31.40682.35202.37621.01191.01143.28872.5997
N41.40682.35202.37623.28872.59971.01191.0114
H52.07422.55841.01193.28871.74694.12063.6053
H62.13773.27181.01142.59971.74693.60532.4138
H72.07422.55843.28871.01194.12063.60531.7469
H82.13773.27182.59971.01143.60532.41381.7469

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 117.156 C1 N3 H6 123.438
C1 N4 H7 117.156 C1 N4 H8 123.438
O2 C1 N3 122.374 O2 C1 N4 122.374
N3 C1 N4 115.252 H5 N3 H6 119.406
H7 N4 H8 119.406
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability