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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: QCISD(T)=FULL/6-31G*

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 QCISD(T)=FULL/6-31G*
Rotational Constants (cm-1) from geometry optimized at QCISD(T)=FULL/6-31G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/6-31G*
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Vibrational Frequencies calculated at QCISD(T)=FULL/6-31G*
Rotational Constants (cm-1) from geometry optimized at QCISD(T)=FULL/6-31G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/6-31G*
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at QCISD(T)=FULL/6-31G*
 hartrees
Energy at 0K-224.658154
Energy at 298.15K 
HF Energy-223.979142
Nuclear repulsion energy123.346589
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)=FULL/6-31G*
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 3761 3761        
2 A1 3633 3633        
3 A1 1837 1837        
4 A1 1656 1656        
5 A1 1162 1162        
6 A1 986 986        
7 A1 480 480        
8 A2 367 367        
9 A2 509i 509i        
10 B1 757 757        
11 B1 574 574        
12 B1 408i 408i        
13 B2 3759 3759        
14 B2 3625 3625        
15 B2 1654 1654        
16 B2 1462 1462        
17 B2 1007 1007        
18 B2 557 557        

Unscaled Zero Point Vibrational Energy (zpe) 13179.8 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 13179.8 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 QCISD(T)=FULL/6-31G*
ABC
0.37050 0.34617 0.17896

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)=FULL/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.143
O2 0.000 0.000 1.371
N3 0.000 1.158 -0.601
N4 0.000 -1.158 -0.601
H5 0.000 2.030 -0.092
H6 0.000 1.183 -1.610
H7 0.000 -2.030 -0.092
H8 0.000 -1.183 -1.610

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.22821.37691.37692.04312.11482.04312.1148
O21.22822.28752.28752.50203.20752.50203.2075
N31.37692.28752.31661.00921.00923.22832.5491
N41.37692.28752.31663.22832.54911.00921.0092
H52.04312.50201.00923.22831.73854.05913.5530
H62.11483.20751.00922.54911.73853.55302.3653
H72.04312.50203.22831.00924.05913.55301.7385
H82.11483.20752.54911.00923.55302.36531.7385

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 116.963 C1 N3 H6 124.107
C1 N4 H7 116.963 C1 N4 H8 124.107
O2 C1 N3 122.725 O2 C1 N4 122.725
N3 C1 N4 114.551 H5 N3 H6 118.930
H7 N4 H8 118.930
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability