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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: CCD/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 CCD/TZVP
 hartrees
Energy at 0K-224.773155
Energy at 298.15K-224.779502
HF Energy-224.072012
Nuclear repulsion energy123.976961
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 CCD/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 3739 3544 34.79      
2 A 3629 3440 5.16      
3 A 1873 1775 469.04      
4 A 1667 1580 0.09      
5 A 1226 1163 4.63      
6 A 969 919 8.81      
7 A 689 653 130.53      
8 A 491 465 1.54      
9 A 392 372 74.82      
10 B 3739 3544 22.97      
11 B 3625 3437 48.43      
12 B 1673 1586 181.25      
13 B 1442 1367 207.87      
14 B 1091 1035 26.31      
15 B 810 768 149.33      
16 B 613 581 257.57      
17 B 584 554 65.86      
18 B 467 443 16.87      

Unscaled Zero Point Vibrational Energy (zpe) 14359.5 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 13612.8 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 CCD/TZVP
ABC
0.37350 0.34755 0.18202

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

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 1.356
N3 0.000 1.158 -0.615
N4 0.000 -1.158 -0.615
H5 0.231 1.974 -0.073
H6 0.493 1.107 -1.492
H7 -0.231 -1.974 -0.073
H8 -0.493 -1.107 -1.492

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.20791.38741.38742.00002.03922.00002.0392
O21.20792.28662.28662.44803.09512.44803.0951
N31.38742.28662.31681.00671.00703.18772.4785
N41.38742.28662.31683.18772.47851.00671.0070
H52.00002.44801.00673.18771.68383.97553.4687
H62.03923.09511.00702.47851.68383.46872.4234
H72.00002.44803.18771.00673.97553.46871.6838
H82.03923.09512.47851.00703.46872.42341.6838

picture of Urea state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 112.334 C1 N3 H6 115.873
C1 N4 H7 112.334 C1 N4 H8 115.873
O2 C1 N3 123.392 O2 C1 N4 123.392
N3 C1 N4 113.216 H5 N3 H6 113.478
H7 N4 H8 113.478
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Energy calculated at CCD/TZVP
 hartrees
Energy at 0K-224.770991
Energy at 298.15K-224.777099
HF Energy-224.070396
Nuclear repulsion energy124.008557
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 CCD/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' 3762 3567 35.95      
2 A' 3647 3458 11.40      
3 A' 1861 1764 497.78      
4 A' 1680 1593 18.79      
5 A' 1219 1156 6.22      
6 A' 976 925 15.08      
7 A' 792 751 75.41      
8 A' 576 546 283.41      
9 A' 524 497 57.47      
10 A' 479 454 54.38      
11 A" 3759 3564 25.74      
12 A" 3640 3450 46.15      
13 A" 1665 1578 186.37      
14 A" 1446 1370 213.55      
15 A" 1060 1005 25.11      
16 A" 597 566 41.31      
17 A" 505 479 136.63      
18 A" 270 256 3.51      

Unscaled Zero Point Vibrational Energy (zpe) 14228.8 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 13488.9 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 CCD/TZVP
ABC
0.37674 0.34579 0.18158

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.008 0.144 0.000
O2 0.045 1.353 0.000
N3 0.045 -0.605 1.163
N4 0.045 -0.605 -1.163
H5 -0.190 -0.074 1.983
H6 -0.329 -1.537 1.144
H7 -0.190 -0.074 -1.983
H8 -0.329 -1.537 -1.144

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.20931.38361.38362.00512.06152.00512.0615
O21.20932.27702.27702.45453.13102.45453.1310
N31.38362.27702.32521.00551.00513.19922.5159
N41.38362.27702.32523.19922.51591.00551.0051
H52.00512.45451.00553.19921.69313.96683.4556
H62.06153.13101.00512.51591.69313.45562.2877
H72.00512.45453.19921.00553.96683.45561.6931
H82.06153.13102.51591.00513.45562.28771.6931

picture of Urea state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 113.177 C1 N3 H6 118.460
C1 N4 H7 113.177 C1 N4 H8 118.460
O2 C1 N3 122.706 O2 C1 N4 122.706
N3 C1 N4 114.345 H5 N3 H6 114.723
H7 N4 H8 114.723
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at CCD/TZVP
 hartrees
Energy at 0K-224.768597
Energy at 298.15K 
HF Energy-224.070995
Nuclear repulsion energy124.254479
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 CCD/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 3826 3627 67.12      
2 A1 3694 3502 11.84      
3 A1 1844 1748 587.01      
4 A1 1668 1581 2.31      
5 A1 1175 1114 0.43      
6 A1 990 939 16.17      
7 A1 495 469 2.01      
8 A2 311 295 0.00      
9 A2 560i 531i 0.00      
10 B1 752 713 1.68      
11 B1 539 511 11.36      
12 B1 489i 464i 519.25      
13 B2 3823 3625 35.85      
14 B2 3686 3495 82.96      
15 B2 1661 1575 267.20      
16 B2 1451 1376 263.80      
17 B2 1018 965 14.41      
18 B2 584 554 14.23      

Unscaled Zero Point Vibrational Energy (zpe) 13234.6 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 12546.4 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 CCD/TZVP
ABC
0.37776 0.34921 0.18146

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

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 1.357
N3 0.000 1.154 -0.596
N4 0.000 -1.154 -0.596
H5 0.000 2.020 -0.093
H6 0.000 1.169 -1.597
H7 0.000 -2.020 -0.093
H8 0.000 -1.169 -1.597

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21251.37121.37122.03402.09742.03402.0974
O21.21252.26852.26852.48683.17672.48683.1767
N31.37122.26852.30791.00151.00073.21362.5296
N41.37122.26852.30793.21362.52961.00151.0007
H52.03402.48681.00153.21361.72734.04023.5260
H62.09743.17671.00072.52961.72733.52602.3388
H72.03402.48683.21361.00154.04023.52601.7273
H82.09743.17672.52961.00073.52602.33881.7273

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 117.174 C1 N3 H6 123.580
C1 N4 H7 117.174 C1 N4 H8 123.580
O2 C1 N3 122.693 O2 C1 N4 122.693
N3 C1 N4 114.614 H5 N3 H6 119.246
H7 N4 H8 119.246
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability