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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: MP2/6-31G(2df,p)

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 MP2/6-31G(2df,p)
 hartrees
Energy at 0K-224.774852
Energy at 298.15K-224.781093
HF Energy-224.014671
Nuclear repulsion energy123.781921
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 MP2/6-31G(2df,p)
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 3757 3549 50.09      
2 A 3634 3432 4.67      
3 A 1859 1756 325.51      
4 A 1640 1549 0.43      
5 A 1195 1129 2.07      
6 A 964 911 6.64      
7 A 628 593 100.13      
8 A 474 447 2.41      
9 A 399 377 69.30      
10 B 3756 3548 30.36      
11 B 3631 3429 63.32      
12 B 1646 1554 182.80      
13 B 1433 1353 177.64      
14 B 1068 1008 19.95      
15 B 801 756 88.79      
16 B 590 557 206.19      
17 B 555 524 96.16      
18 B 452 427 73.06      

Unscaled Zero Point Vibrational Energy (zpe) 14239.9 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 13449.6 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 MP2/6-31G(2df,p)
ABC
0.36974 0.34902 0.18150

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.151
O2 0.000 0.000 1.365
N3 0.000 1.153 -0.616
N4 0.000 -1.153 -0.616
H5 0.216 1.976 -0.080
H6 0.443 1.114 -1.520
H7 -0.216 -1.976 -0.080
H8 -0.443 -1.114 -1.520

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21401.38471.38472.00162.05652.00162.0565
O21.21402.29232.29232.45793.12402.45793.1240
N31.38472.29232.30511.00661.00673.18202.4801
N41.38472.29232.30513.18202.48011.00661.0067
H52.00162.45791.00663.18201.69343.97653.4728
H62.05653.12401.00672.48011.69343.47282.3983
H72.00162.45793.18201.00663.97653.47281.6934
H82.05653.12402.48011.00673.47282.39831.6934

picture of Urea state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 112.697 C1 N3 H6 117.758
C1 N4 H7 112.697 C1 N4 H8 117.758
O2 C1 N3 123.660 O2 C1 N4 123.660
N3 C1 N4 112.679 H5 N3 H6 114.514
H7 N4 H8 114.514
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-224.772776
Energy at 298.15K-224.778638
HF Energy-224.013037
Nuclear repulsion energy123.839780
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 MP2/6-31G(2df,p)
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' 3786 3576 53.22      
2 A' 3658 3455 13.66      
3 A' 1851 1748 346.67      
4 A' 1653 1561 18.62      
5 A' 1193 1127 2.58      
6 A' 972 918 10.55      
7 A' 786 742 33.68      
8 A' 554 523 64.59      
9 A' 493 465 85.44      
10 A' 447 422 238.62      
11 A" 3783 3573 32.95      
12 A" 3650 3447 61.00      
13 A" 1636 1546 196.80      
14 A" 1437 1358 176.94      
15 A" 1032 974 17.42      
16 A" 573 541 32.38      
17 A" 446 422 104.50      
18 A" 200 189 34.81      

Unscaled Zero Point Vibrational Energy (zpe) 14073.8 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 13292.7 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 MP2/6-31G(2df,p)
ABC
0.37342 0.34715 0.18107

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.009 0.144 0.000
O2 0.043 1.360 0.000
N3 0.043 -0.607 1.160
N4 0.043 -0.607 -1.160
H5 -0.183 -0.073 1.982
H6 -0.316 -1.546 1.150
H7 -0.183 -0.073 -1.982
H8 -0.316 -1.546 -1.150

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21591.38251.38252.00302.07012.00302.0701
O21.21592.28352.28352.45593.14562.45593.1456
N31.38252.28352.31971.00611.00523.19482.5189
N41.38252.28352.31973.19482.51891.00611.0052
H52.00302.45591.00613.19481.69713.96383.4634
H62.07013.14561.00522.51891.69713.46342.2996
H72.00302.45593.19481.00613.96383.46341.6971
H82.07013.14562.51891.00523.46342.29961.6971

picture of Urea state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 113.033 C1 N3 H6 119.385
C1 N4 H7 113.033 C1 N4 H8 119.385
O2 C1 N3 122.874 O2 C1 N4 122.874
N3 C1 N4 114.057 H5 N3 H6 115.091
H7 N4 H8 115.091
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-224.771488
Energy at 298.15K 
HF Energy-224.012923
Nuclear repulsion energy124.094500
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 MP2/6-31G(2df,p)
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 3846 3632 78.97      
2 A1 3703 3497 12.12      
3 A1 1847 1744 397.21      
4 A1 1635 1544 4.99      
5 A1 1154 1090 0.03      
6 A1 985 930 9.44      
7 A1 480 453 2.61      
8 A2 379 358 0.00      
9 A2 446i 421i 0.00      
10 B1 788 745 6.04      
11 B1 585 553 9.56      
12 B1 352i 333i 459.81      
13 B2 3843 3630 43.13      
14 B2 3694 3489 98.24      
15 B2 1632 1541 286.80      
16 B2 1446 1366 183.63      
17 B2 993 938 9.70      
18 B2 562 530 14.43      

Unscaled Zero Point Vibrational Energy (zpe) 13386.3 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 12643.3 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 MP2/6-31G(2df,p)
ABC
0.37452 0.35039 0.18103

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

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 1.363
N3 0.000 1.152 -0.599
N4 0.000 -1.152 -0.599
H5 0.000 2.016 -0.093
H6 0.000 1.171 -1.600
H7 0.000 -2.016 -0.093
H8 0.000 -1.171 -1.600

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21771.37151.37152.03032.10162.03032.1016
O21.21772.27522.27522.48693.18582.48693.1858
N31.37152.27522.30361.00191.00083.20832.5292
N41.37152.27522.30363.20832.52921.00191.0008
H52.03032.48691.00193.20831.72784.03253.5256
H62.10163.18581.00082.52921.72783.52562.3421
H72.03032.48693.20831.00194.03253.52561.7278
H82.10163.18582.52921.00083.52562.34211.7278

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 116.763 C1 N3 H6 123.983
C1 N4 H7 116.763 C1 N4 H8 123.983
O2 C1 N3 122.878 O2 C1 N4 122.878
N3 C1 N4 114.243 H5 N3 H6 119.254
H7 N4 H8 119.254
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability