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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: QCISD(T)/aug-cc-pVTZ

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(T)/aug-cc-pVTZ
 hartrees
Energy at 0K-224.959413
Energy at 298.15K-224.965619
HF Energy-224.083712
Nuclear repulsion energy123.527933
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(T)/aug-cc-pVTZ
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 3685 3563        
2 A 3574 3455        
3 A 1795 1736        
4 A 1640 1585        
5 A 1190 1150        
6 A 948 916        
7 A 603 583        
8 A 472 456        
9 A 383 371        
10 B 3684 3562        
11 B 3570 3452        
12 B 1644 1590        
13 B 1415 1368        
14 B 1066 1030        
15 B 783 757        
16 B 582 563        
17 B 545 527        
18 B 454 439        

Unscaled Zero Point Vibrational Energy (zpe) 14016.5 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 13551.1 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(T)/aug-cc-pVTZ
ABC
0.37052 0.34556 0.18060

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

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 1.363
N3 0.000 1.162 -0.616
N4 0.000 -1.162 -0.616
H5 -0.238 1.978 -0.071
H6 -0.467 1.114 -1.508
H7 0.238 -1.978 -0.071
H8 0.467 -1.114 -1.508

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21841.38911.38912.00352.04772.00352.0477
O21.21842.29512.29512.45483.11552.45483.1155
N31.38912.29512.32491.00851.00853.19572.4897
N41.38912.29512.32493.19572.48971.00851.0085
H52.00352.45481.00853.19571.69193.98363.4815
H62.04773.11551.00852.48971.69193.48152.4161
H72.00352.45483.19571.00853.98363.48151.6919
H82.04773.11552.48971.00853.48152.41611.6919

picture of Urea state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 112.393 C1 N3 H6 116.402
C1 N4 H7 112.393 C1 N4 H8 116.402
O2 C1 N3 123.194 O2 C1 N4 123.194
N3 C1 N4 113.611 H5 N3 H6 114.032
H7 N4 H8 114.032
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Energy calculated at QCISD(T)/aug-cc-pVTZ
 hartrees
Energy at 0K-224.957712
Energy at 298.15K 
HF Energy-224.082357
Nuclear repulsion energy123.573731
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(T)/aug-cc-pVTZ
Rotational Constants (cm-1) from geometry optimized at QCISD(T)/aug-cc-pVTZ
ABC
0.37052 0.34556 0.18060

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

Point Group is Cs

Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at QCISD(T)/aug-cc-pVTZ
 hartrees
Energy at 0K-224.956588
Energy at 298.15K 
HF Energy-224.082735
Nuclear repulsion energy123.811983
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(T)/aug-cc-pVTZ
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 3770 3645        
2 A1 3635 3514        
3 A1 1773 1714        
4 A1 1627 1573        
5 A1 1141 1103        
6 A1 967 935        
7 A1 473 458        
8 A2 360 348        
9 A2 431i 417i        
10 B1 770 745        
11 B1 565 546        
12 B1 350i 338i        
13 B2 3768 3643        
14 B2 3628 3507        
15 B2 1626 1572        
16 B2 1424 1377        
17 B2 989 956        
18 B2 560 541        

Unscaled Zero Point Vibrational Energy (zpe) 13147.4 cm-1
Scaled (by 0.9668) Zero Point Vibrational Energy (zpe) 12710.9 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 QCISD(T)/aug-cc-pVTZ
ABC
0.37482 0.34694 0.18017

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

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 1.363
N3 0.000 1.158 -0.598
N4 0.000 -1.158 -0.598
H5 0.000 2.023 -0.090
H6 0.000 1.174 -1.600
H7 0.000 -2.023 -0.090
H8 0.000 -1.174 -1.600

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.22241.37381.37382.03592.09982.03592.0998
O21.22242.27782.27782.49063.18762.49063.1876
N31.37382.27782.31631.00301.00243.22132.5381
N41.37382.27782.31633.22132.53811.00301.0024
H52.03592.49061.00303.22131.73284.04573.5354
H62.09983.18761.00242.53811.73283.53542.3473
H72.03592.49063.22131.00304.04573.53541.7328
H82.09983.18762.53811.00243.53542.34731.7328

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 117.013 C1 N3 H6 123.427
C1 N4 H7 117.013 C1 N4 H8 123.427
O2 C1 N3 122.540 O2 C1 N4 122.540
N3 C1 N4 114.921 H5 N3 H6 119.560
H7 N4 H8 119.560
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability