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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: QCISD/aug-cc-pVDZ

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 QCISD/aug-cc-pVDZ
 hartrees
Energy at 0K-224.738700
Energy at 298.15K-224.744895
HF Energy-224.029034
Nuclear repulsion energy122.879146
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 QCISD/aug-cc-pVDZ
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 3693 3578 34.66      
2 A 3577 3465 3.44      
3 A 1794 1738 419.89      
4 A 1635 1584 3.14      
5 A 1193 1156 7.63      
6 A 952 923 8.76      
7 A 609 590 94.64      
8 A 473 458 2.74      
9 A 378 366 72.10      
10 B 3693 3577 25.90      
11 B 3574 3462 40.60      
12 B 1644 1593 164.74      
13 B 1423 1378 191.02      
14 B 1072 1039 27.18      
15 B 783 759 78.44      
16 B 581 563 159.21      
17 B 548 531 132.59      
18 B 438 424 53.69      

Unscaled Zero Point Vibrational Energy (zpe) 14029.3 cm-1
Scaled (by 0.9687) Zero Point Vibrational Energy (zpe) 13590.2 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 QCISD/aug-cc-pVDZ
ABC
0.36662 0.34191 0.17883

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/aug-cc-pVDZ

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.145
O2 0.000 0.000 1.370
N3 0.000 1.168 -0.620
N4 0.000 -1.168 -0.620
H5 0.235 1.987 -0.069
H6 0.491 1.119 -1.506
H7 -0.235 -1.987 -0.069
H8 -0.491 -1.119 -1.506

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.22531.39641.39642.01222.05462.01222.0546
O21.22532.30782.30782.46473.12562.46473.1256
N31.39642.30782.33651.01441.01473.21152.5020
N41.39642.30782.33653.21152.50201.01441.0147
H52.01222.46471.01443.21151.69854.00153.4989
H62.05463.12561.01472.50201.69853.49892.4447
H72.01222.46473.21151.01444.00153.49891.6985
H82.05463.12562.50201.01473.49892.44471.6985

picture of Urea state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 112.191 C1 N3 H6 115.984
C1 N4 H7 112.191 C1 N4 H8 115.984
O2 C1 N3 123.214 O2 C1 N4 123.214
N3 C1 N4 113.571 H5 N3 H6 113.662
H7 N4 H8 113.662
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Energy calculated at QCISD/aug-cc-pVDZ
 hartrees
Energy at 0K-224.736822
Energy at 298.15K-224.742623
HF Energy-224.027588
Nuclear repulsion energy122.935665
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 QCISD/aug-cc-pVDZ
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' 3724 3607 37.39      
2 A' 3600 3488 6.30      
3 A' 1782 1727 451.36      
4 A' 1647 1595 13.64      
5 A' 1185 1148 7.81      
6 A' 961 931 12.94      
7 A' 769 745 27.18      
8 A' 530 513 55.57      
9 A' 484 469 50.55      
10 A' 430 417 265.31      
11 A" 3721 3605 29.34      
12 A" 3593 3480 45.19      
13 A" 1637 1585 185.97      
14 A" 1427 1382 191.69      
15 A" 1036 1004 23.43      
16 A" 570 552 28.90      
17 A" 428 415 95.43      
18 A" 191 185 25.89      

Unscaled Zero Point Vibrational Energy (zpe) 13857.1 cm-1
Scaled (by 0.9687) Zero Point Vibrational Energy (zpe) 13423.3 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 QCISD/aug-cc-pVDZ
ABC
0.36989 0.34048 0.17840

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.009 0.141 0.000
O2 0.042 1.367 0.000
N3 0.042 -0.609 1.172
N4 0.042 -0.609 -1.172
H5 -0.183 -0.073 2.001
H6 -0.310 -1.558 1.159
H7 -0.183 -0.073 -2.001
H8 -0.310 -1.558 -1.159

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.22701.39121.39122.02112.08102.02112.0810
O21.22702.29732.29732.47543.16602.47543.1660
N31.39122.29732.34311.01251.01243.22502.5412
N41.39122.29732.34313.22502.54121.01251.0124
H52.02112.47541.01253.22501.71124.00123.4937
H62.08103.16601.01242.54121.71123.49372.3187
H72.02112.47543.22501.01254.00123.49371.7112
H82.08103.16602.54121.01243.49372.31871.7112

picture of Urea state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 113.517 C1 N3 H6 119.108
C1 N4 H7 113.517 C1 N4 H8 119.108
O2 C1 N3 122.543 O2 C1 N4 122.543
N3 C1 N4 114.724 H5 N3 H6 115.357
H7 N4 H8 115.357
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at QCISD/aug-cc-pVDZ
 hartrees
Energy at 0K-224.735709
Energy at 298.15K 
HF Energy-224.027572
Nuclear repulsion energy123.165524
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 QCISD/aug-cc-pVDZ
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 3787 3669 57.05      
2 A1 3647 3533 8.19      
3 A1 1770 1715 511.17      
4 A1 1638 1586 1.59      
5 A1 1147 1111 2.22      
6 A1 976 946 12.66      
7 A1 476 461 2.43      
8 A2 368 356 0.00      
9 A2 415i 402i 0.00      
10 B1 769 745 3.24      
11 B1 564 547 8.29      
12 B1 333i 322i 436.92      
13 B2 3785 3666 38.66      
14 B2 3640 3526 73.96      
15 B2 1641 1589 260.21      
16 B2 1435 1391 218.58      
17 B2 1000 968 15.18      
18 B2 561 543 14.70      

Unscaled Zero Point Vibrational Energy (zpe) 13227.5 cm-1
Scaled (by 0.9687) Zero Point Vibrational Energy (zpe) 12813.4 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 QCISD/aug-cc-pVDZ
ABC
0.37086 0.34346 0.17832

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.141
O2 0.000 0.000 1.371
N3 0.000 1.164 -0.601
N4 0.000 -1.164 -0.601
H5 0.000 2.034 -0.092
H6 0.000 1.179 -1.609
H7 0.000 -2.034 -0.092
H8 0.000 -1.179 -1.609

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.22971.38031.38032.04762.11012.04762.1101
O21.22972.28962.28962.50563.20442.50563.2044
N31.38032.28962.32781.00841.00803.23852.5505
N41.38032.28962.32783.23852.55051.00841.0080
H52.04762.50561.00843.23851.74144.06873.5534
H62.11013.20441.00802.55051.74143.55342.3581
H72.04762.50563.23851.00844.06873.55341.7414
H82.11013.20442.55051.00803.55342.35811.7414

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 117.160 C1 N3 H6 123.384
C1 N4 H7 117.160 C1 N4 H8 123.384
O2 C1 N3 122.522 O2 C1 N4 122.522
N3 C1 N4 114.956 H5 N3 H6 119.455
H7 N4 H8 119.455
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability