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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: MP4=FULL/6-31G*

19 10 17 12 22

States and conformations

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

Conformer 1 (C2)

Jump to S1C2 S1C3
Energy calculated at MP4=FULL/6-31G*
 hartrees
Energy at 0K-224.665304
Energy at 298.15K-224.671576
HF Energy-223.980478
Nuclear repulsion energy122.853680
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 MP4=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 3669 3528        
2 A 3555 3419        
3 A 1836 1765        
4 A 1673 1608        
5 A 1209 1163        
6 A 953 916        
7 A 695 668        
8 A 473 455        
9 A 408 392        
10 B 3668 3528        
11 B 3553 3417        
12 B 1680 1616        
13 B 1443 1388        
14 B 1090 1048        
15 B 799 769        
16 B 607 583        
17 B 557 536        
18 B 451 433        

Unscaled Zero Point Vibrational Energy (zpe) 14158.5 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 13614.8 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 MP4=FULL/6-31G*
ABC
0.36366 0.34431 0.17904

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/6-31G*

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.146
O2 0.000 0.000 1.375
N3 0.000 1.163 -0.626
N4 0.000 -1.163 -0.626
H5 0.233 1.979 -0.068
H6 0.530 1.113 -1.491
H7 -0.233 -1.979 -0.068
H8 -0.530 -1.113 -1.491

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.22821.39611.39612.00452.04952.00452.0495
O21.22822.31382.31382.46033.11962.46033.1196
N31.39612.31382.32641.01561.01613.20012.4919
N41.39612.31382.32643.20012.49191.01561.0161
H52.00452.46031.01563.20011.69243.98603.4883
H62.04953.11961.01612.49191.69243.48832.4647
H72.00452.46033.20011.01563.98603.48831.6924
H82.04953.11962.49191.01613.48832.46471.6924

picture of Urea state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 111.464 C1 N3 H6 115.451
C1 N4 H7 111.464 C1 N4 H8 115.451
O2 C1 N3 123.573 O2 C1 N4 123.573
N3 C1 N4 112.854 H5 N3 H6 112.822
H7 N4 H8 112.822
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Energy calculated at MP4=FULL/6-31G*
 hartrees
Energy at 0K-224.665304
Energy at 298.15K-224.671576
HF Energy-223.980478
Nuclear repulsion energy122.853680
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 MP4=FULL/6-31G*
Rotational Constants (cm-1) from geometry optimized at MP4=FULL/6-31G*
ABC
0.36366 0.34431 0.17904

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/6-31G*

Point Group is C2

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at MP4=FULL/6-31G*
 hartrees
Energy at 0K-224.660357
Energy at 298.15K 
HF Energy-223.978668
Nuclear repulsion energy123.178659
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 MP4=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 A1 3765 3621        
2 A1 3635 3496        
3 A1 1825 1755        
4 A1 1656 1593        
5 A1 1157 1112        
6 A1 979 942        
7 A1 479 461        
8 A2 369 355        
9 A2 509i 489i        
10 B1 752 723        
11 B1 576 554        
12 B1 412i 396i        
13 B2 3763 3619        
14 B2 3627 3488        
15 B2 1654 1590        
16 B2 1456 1400        
17 B2 1002 964        
18 B2 553 532        

Unscaled Zero Point Vibrational Energy (zpe) 13164.1 cm-1
Scaled (by 0.9616) Zero Point Vibrational Energy (zpe) 12658.6 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 MP4=FULL/6-31G*
ABC
0.36855 0.34597 0.17845

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.143
O2 0.000 0.000 1.375
N3 0.000 1.159 -0.603
N4 0.000 -1.159 -0.603
H5 0.000 2.031 -0.095
H6 0.000 1.183 -1.612
H7 0.000 -2.031 -0.095
H8 0.000 -1.183 -1.612

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.23161.37831.37832.04462.11672.04462.1167
O21.23162.29242.29242.50693.21272.50693.2127
N31.37832.29242.31721.00921.00923.22942.5495
N41.37832.29242.31723.22942.54951.00921.0092
H52.04462.50691.00923.22941.73784.06123.5534
H62.11673.21271.00922.54951.73783.55342.3655
H72.04462.50693.22941.00924.06123.55341.7378
H82.11673.21272.54951.00923.55342.36551.7378

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 116.983 C1 N3 H6 124.165
C1 N4 H7 116.983 C1 N4 H8 124.165
O2 C1 N3 122.794 O2 C1 N4 122.794
N3 C1 N4 114.413 H5 N3 H6 118.852
H7 N4 H8 118.852
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability