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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: QCISD(T)/6-311G*

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)/6-311G*
Rotational Constants (cm-1) from geometry optimized at QCISD(T)/6-311G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-311G*
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Vibrational Frequencies calculated at QCISD(T)/6-311G*
Rotational Constants (cm-1) from geometry optimized at QCISD(T)/6-311G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-311G*
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at QCISD(T)/6-311G*
 hartrees
Energy at 0K-224.744473
Energy at 298.15K 
HF Energy-224.036905
Nuclear repulsion energy123.557935
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)/6-311G*
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 3646        
2 A1 3657 3521        
3 A1 1823 1755        
4 A1 1686 1623        
5 A1 1168 1125        
6 A1 976 940        
7 A1 483 465        
8 A2 344 331        
9 A2 562i 541i        
10 B1 765 737        
11 B1 563 543        
12 B1 471i 453i        
13 B2 3784 3643        
14 B2 3648 3513        
15 B2 1679 1617        
16 B2 1450 1396        
17 B2 1010 972        
18 B2 562 541        

Unscaled Zero Point Vibrational Energy (zpe) 13176.3 cm-1
Scaled (by 0.9628) Zero Point Vibrational Energy (zpe) 12686.2 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(T)/6-311G*
ABC
0.37275 0.34565 0.17935

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-311G*

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 1.366
N3 0.000 1.160 -0.600
N4 0.000 -1.160 -0.600
H5 0.000 2.027 -0.094
H6 0.000 1.183 -1.604
H7 0.000 -2.027 -0.094
H8 0.000 -1.183 -1.604

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.22091.37891.37892.04062.11222.04062.1122
O21.22092.28322.28322.49763.19762.49763.1976
N31.37892.28322.31951.00411.00413.22642.5491
N41.37892.28322.31953.22642.54911.00411.0041
H52.04062.49761.00413.22641.73004.05323.5477
H62.11223.19761.00412.54911.73003.54772.3668
H72.04062.49763.22641.00414.05323.54771.7300
H82.11223.19762.54911.00413.54772.36681.7300

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 116.942 C1 N3 H6 124.091
C1 N4 H7 116.942 C1 N4 H8 124.091
O2 C1 N3 122.743 O2 C1 N4 122.743
N3 C1 N4 114.513 H5 N3 H6 118.967
H7 N4 H8 118.967
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability