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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: MP2/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-224.897743
Energy at 298.15K-224.903941
HF Energy-224.090421
Nuclear repulsion energy123.886904
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/Def2TZVPP
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 3737 3556 53.07      
2 A 3614 3439 4.71      
3 A 1817 1728 395.08      
4 A 1632 1552 0.00      
5 A 1186 1129 3.39      
6 A 961 915 10.82      
7 A 594 565 90.84      
8 A 475 452 1.29      
9 A 387 368 69.72      
10 B 3737 3555 32.61      
11 B 3611 3436 62.93      
12 B 1638 1559 180.66      
13 B 1424 1355 199.27      
14 B 1059 1007 24.95      
15 B 786 748 61.73      
16 B 583 554 128.31      
17 B 550 523 152.48      
18 B 454 432 112.09      

Unscaled Zero Point Vibrational Energy (zpe) 14121.4 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 13436.5 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/Def2TZVPP
ABC
0.37162 0.34874 0.18164

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/Def2TZVPP

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.148
O2 0.000 0.000 1.363
N3 0.000 1.154 -0.614
N4 0.000 -1.154 -0.614
H5 0.210 1.980 -0.080
H6 0.437 1.117 -1.518
H7 -0.210 -1.980 -0.080
H8 -0.437 -1.117 -1.518

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21451.38351.38352.00402.05342.00402.0534
O21.21452.28942.28942.45883.12102.45883.1210
N31.38352.28942.30901.00511.00503.18642.4835
N41.38352.28942.30903.18642.48351.00511.0050
H52.00402.45881.00513.18641.69283.98183.4751
H62.05343.12101.00502.48351.69283.47512.3984
H72.00402.45883.18641.00513.98183.47511.6928
H82.05343.12102.48351.00503.47512.39841.6928

picture of Urea state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 113.106 C1 N3 H6 117.692
C1 N4 H7 113.106 C1 N4 H8 117.692
O2 C1 N3 123.441 O2 C1 N4 123.441
N3 C1 N4 113.118 H5 N3 H6 114.726
H7 N4 H8 114.726
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Energy calculated at MP2/Def2TZVPP
 hartrees
Energy at 0K-224.896079
Energy at 298.15K-224.901912
HF Energy-224.089106
Nuclear repulsion energy123.925280
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/Def2TZVPP
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' 3764 3581 56.08      
2 A' 3635 3459 10.49      
3 A' 1810 1722 421.23      
4 A' 1643 1564 14.13      
5 A' 1183 1126 3.26      
6 A' 968 921 13.68      
7 A' 776 738 22.20      
8 A' 549 522 43.20      
9 A' 486 463 53.54      
10 A' 440 419 299.40      
11 A" 3761 3578 34.83      
12 A" 3628 3452 64.36      
13 A" 1629 1550 198.35      
14 A" 1427 1358 198.75      
15 A" 1025 975 22.05      
16 A" 572 545 24.37      
17 A" 430 409 92.81      
18 A" 203 193 32.33      

Unscaled Zero Point Vibrational Energy (zpe) 13963.9 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 13286.7 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/Def2TZVPP
ABC
0.37449 0.34729 0.18121

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.024 0.140 0.000
O2 0.039 1.358 0.000
N3 0.039 -0.605 1.161
N4 0.039 -0.605 -1.161
H5 -0.188 -0.071 1.981
H6 -0.310 -1.545 1.147
H7 -0.188 -0.071 -1.981
H8 -0.310 -1.545 -1.147

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21821.37901.37902.00342.06542.00342.0654
O21.21822.28012.28012.45323.14082.45323.1408
N31.37902.28012.32141.00441.00333.19472.5163
N41.37902.28012.32143.19472.51631.00441.0033
H52.00342.45321.00443.19471.69793.96193.4599
H62.06543.14081.00332.51631.69793.45992.2939
H72.00342.45323.19471.00443.96193.45991.6979
H82.06543.14082.51631.00333.45992.29391.6979

picture of Urea state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 113.467 C1 N3 H6 119.385
C1 N4 H7 113.467 C1 N4 H8 119.385
O2 C1 N3 122.659 O2 C1 N4 122.659
N3 C1 N4 114.642 H5 N3 H6 115.494
H7 N4 H8 115.494
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at MP2/Def2TZVPP
 hartrees
Energy at 0K-224.895058
Energy at 298.15K 
HF Energy-224.089202
Nuclear repulsion energy124.121401
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/Def2TZVPP
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 3815 3630 79.40      
2 A1 3672 3494 10.03      
3 A1 1804 1716 478.10      
4 A1 1627 1548 1.28      
5 A1 1146 1090 0.22      
6 A1 979 931 13.15      
7 A1 479 456 2.25      
8 A2 363 345 0.00      
9 A2 431i 410i 0.00      
10 B1 773 735 1.86      
11 B1 573 545 9.25      
12 B1 342i 325i 439.79      
13 B2 3813 3628 44.20      
14 B2 3665 3487 93.22      
15 B2 1627 1548 281.55      
16 B2 1434 1364 207.63      
17 B2 991 943 14.12      
18 B2 564 537 12.65      

Unscaled Zero Point Vibrational Energy (zpe) 13274.2 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 12630.4 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/Def2TZVPP
ABC
0.37551 0.34978 0.18110

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.145
O2 0.000 0.000 1.364
N3 0.000 1.150 -0.600
N4 0.000 -1.150 -0.600
H5 0.000 2.014 -0.096
H6 0.000 1.167 -1.600
H7 0.000 -2.014 -0.096
H8 0.000 -1.167 -1.600

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21901.37021.37022.02812.09952.02812.0995
O21.21902.27602.27602.48743.18582.48743.1858
N31.37022.27602.29981.00011.00053.20362.5234
N41.37022.27602.29983.20362.52341.00011.0005
H52.02812.48741.00013.20361.72654.02753.5183
H62.09953.18581.00052.52341.72653.51832.3334
H72.02812.48743.20361.00014.02753.51831.7265
H82.09953.18582.52341.00053.51832.33341.7265

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 116.796 C1 N3 H6 123.903
C1 N4 H7 116.796 C1 N4 H8 123.903
O2 C1 N3 122.941 O2 C1 N4 122.941
N3 C1 N4 114.118 H5 N3 H6 119.302
H7 N4 H8 119.302
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability