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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: MP2/TZVP

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/TZVP
 hartrees
Energy at 0K-224.763330
Energy at 298.15K-224.769650
HF Energy-224.071147
Nuclear repulsion energy123.633437
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/TZVP
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 3733 3538 42.54      
2 A 3613 3425 4.88      
3 A 1825 1730 406.90      
4 A 1644 1559 0.03      
5 A 1205 1143 3.35      
6 A 959 909 9.30      
7 A 684 648 123.36      
8 A 487 461 1.92      
9 A 392 371 69.08      
10 B 3733 3538 28.22      
11 B 3610 3422 55.67      
12 B 1651 1565 183.59      
13 B 1422 1348 209.21      
14 B 1070 1014 27.70      
15 B 790 749 139.10      
16 B 607 576 276.63      
17 B 574 544 47.81      
18 B 473 448 22.73      

Unscaled Zero Point Vibrational Energy (zpe) 14234.9 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 13493.2 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/TZVP
ABC
0.36949 0.34753 0.18103

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

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.147
O2 0.000 0.000 1.365
N3 0.000 1.158 -0.618
N4 0.000 -1.158 -0.618
H5 0.227 1.976 -0.075
H6 0.491 1.108 -1.497
H7 -0.227 -1.976 -0.075
H8 -0.491 -1.108 -1.497

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21721.38841.38842.00162.04302.00162.0430
O21.21722.29632.29632.45543.10792.45543.1079
N31.38842.29632.31641.00791.00813.18932.4799
N41.38842.29632.31643.18932.47991.00791.0081
H52.00162.45541.00793.18931.68733.97843.4716
H62.04303.10791.00812.47991.68733.47162.4240
H72.00162.45543.18931.00793.97843.47161.6873
H82.04303.10792.47991.00813.47162.42401.6873

picture of Urea state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 112.315 C1 N3 H6 116.062
C1 N4 H7 112.315 C1 N4 H8 116.062
O2 C1 N3 123.467 O2 C1 N4 123.467
N3 C1 N4 113.066 H5 N3 H6 113.635
H7 N4 H8 113.635
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Energy calculated at MP2/TZVP
 hartrees
Energy at 0K-224.761251
Energy at 298.15K-224.767337
HF Energy-224.069484
Nuclear repulsion energy123.652553
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/TZVP
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' 3754 3558 42.64      
2 A' 3630 3441 11.58      
3 A' 1817 1722 431.72      
4 A' 1658 1572 19.01      
5 A' 1199 1136 4.67      
6 A' 964 914 13.83      
7 A' 774 734 65.78      
8 A' 579 549 281.77      
9 A' 525 497 71.40      
10 A' 480 455 35.68      
11 A" 3751 3555 30.99      
12 A" 3622 3433 51.72      
13 A" 1644 1558 186.78      
14 A" 1426 1352 213.28      
15 A" 1040 986 27.06      
16 A" 585 555 40.61      
17 A" 503 476 135.99      
18 A" 270 256 2.78      

Unscaled Zero Point Vibrational Energy (zpe) 14109.1 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 13374.0 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/TZVP
ABC
0.37273 0.34556 0.18058

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.005 0.143 0.000
O2 0.046 1.361 0.000
N3 0.046 -0.608 1.163
N4 0.046 -0.608 -1.163
H5 -0.187 -0.075 1.985
H6 -0.327 -1.543 1.146
H7 -0.187 -0.075 -1.985
H8 -0.327 -1.543 -1.146

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21831.38511.38512.00612.06562.00612.0656
O21.21832.28672.28672.46113.14392.46113.1439
N31.38512.28672.32561.00691.00643.20092.5186
N41.38512.28672.32563.20092.51861.00691.0064
H52.00612.46111.00693.20091.69593.96983.4606
H62.06563.14391.00642.51861.69593.46062.2922
H72.00612.46113.20091.00693.96983.46061.6959
H82.06563.14392.51861.00643.46062.29221.6959

picture of Urea state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 113.053 C1 N3 H6 118.620
C1 N4 H7 113.053 C1 N4 H8 118.620
O2 C1 N3 122.768 O2 C1 N4 122.768
N3 C1 N4 114.176 H5 N3 H6 114.784
H7 N4 H8 114.784
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at MP2/TZVP
 hartrees
Energy at 0K-224.758803
Energy at 298.15K 
HF Energy-224.070119
Nuclear repulsion energy123.876017
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/TZVP
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 3814 3616 74.46      
2 A1 3673 3482 11.11      
3 A1 1811 1717 512.60      
4 A1 1648 1563 0.86      
5 A1 1156 1096 0.07      
6 A1 977 926 14.74      
7 A1 490 464 1.93      
8 A2 290 275 0.00      
9 A2 566i 536i 0.00      
10 B1 732 694 0.12      
11 B1 536 508 13.36      
12 B1 500i 474i 504.15      
13 B2 3811 3613 42.33      
14 B2 3666 3475 87.76      
15 B2 1642 1557 265.41      
16 B2 1431 1357 258.54      
17 B2 999 947 15.62      
18 B2 572 543 12.12      

Unscaled Zero Point Vibrational Energy (zpe) 13091.7 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 12409.7 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/TZVP
ABC
0.37379 0.34857 0.18037

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.144
O2 0.000 0.000 1.365
N3 0.000 1.155 -0.599
N4 0.000 -1.155 -0.599
H5 0.000 2.022 -0.095
H6 0.000 1.172 -1.601
H7 0.000 -2.022 -0.095
H8 0.000 -1.172 -1.601

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.22041.37361.37362.03582.10272.03582.1027
O21.22042.27852.27852.49353.18932.49353.1893
N31.37362.27852.30981.00301.00223.21642.5336
N41.37362.27852.30983.21642.53361.00301.0022
H52.03582.49351.00303.21641.72964.04353.5313
H62.10273.18931.00222.53361.72963.53132.3442
H72.03582.49353.21641.00304.04353.53131.7296
H82.10273.18932.53361.00223.53132.34421.7296

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 117.021 C1 N3 H6 123.762
C1 N4 H7 117.021 C1 N4 H8 123.762
O2 C1 N3 122.779 O2 C1 N4 122.779
N3 C1 N4 114.442 H5 N3 H6 119.217
H7 N4 H8 119.217
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability