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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: CCSD(T)/cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 3 yes C2V 1A1

Conformer 1 (C2)

Jump to S1C2 S1C3
Vibrational Frequencies calculated at CCSD(T)/cc-pVQZ
Rotational Constants (cm-1) from geometry optimized at CCSD(T)/cc-pVQZ
See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/cc-pVQZ
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Vibrational Frequencies calculated at CCSD(T)/cc-pVQZ
Rotational Constants (cm-1) from geometry optimized at CCSD(T)/cc-pVQZ
See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/cc-pVQZ
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at CCSD(T)/cc-pVQZ
 hartrees
Energy at 0K-225.006331
Energy at 298.15K 
HF Energy-224.096409
Nuclear repulsion energy124.183075
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 CCSD(T)/cc-pVQZ
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 3788 3673        
2 A1 3652 3542        
3 A1 1795 1741        
4 A1 1628 1579        
5 A1 1149 1114        
6 A1 975 946        
7 A1 476 462        
8 A2 355 344        
9 A2 447i 433i        
10 B1 774 751        
11 B1 564 547        
12 B1 355i 344i        
13 B2 3786 3671        
14 B2 3645 3534        
15 B2 1627 1578        
16 B2 1434 1391        
17 B2 993 963        
18 B2 563 546        

Unscaled Zero Point Vibrational Energy (zpe) 13202.1 cm-1
Scaled (by 0.9697) Zero Point Vibrational Energy (zpe) 12802.0 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 CCSD(T)/cc-pVQZ
ABC
0.37702 0.34913 0.18127

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.142
O2 0.000 0.000 1.359
N3 0.000 1.154 -0.596
N4 0.000 -1.154 -0.596
H5 0.000 2.017 -0.089
H6 0.000 1.169 -1.596
H7 0.000 -2.017 -0.089
H8 0.000 -1.169 -1.596

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.21711.37041.37042.03052.09492.03052.0949
O21.21712.27082.27082.48333.17822.48333.1782
N31.37042.27082.30901.00081.00013.21202.5296
N41.37042.27082.30903.21202.52961.00081.0001
H52.03052.48331.00083.21201.72944.03453.5248
H62.09493.17821.00012.52961.72943.52482.3382
H72.03052.48333.21201.00084.03453.52481.7294
H82.09493.17822.52961.00013.52482.33821.7294

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 116.952 C1 N3 H6 123.438
C1 N4 H7 116.952 C1 N4 H8 123.438
O2 C1 N3 122.600 O2 C1 N4 122.600
N3 C1 N4 114.799 H5 N3 H6 119.610
H7 N4 H8 119.610
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability