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All results from a given calculation for NH2CONH2 (Urea)

using model chemistry: PBEPBEultrafine/3-21G

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 PBEPBEultrafine/3-21G
Rotational Constants (cm-1) from geometry optimized at PBEPBEultrafine/3-21G
See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/3-21G
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (CS)

Jump to S1C1 S1C3
Vibrational Frequencies calculated at PBEPBEultrafine/3-21G
Rotational Constants (cm-1) from geometry optimized at PBEPBEultrafine/3-21G
See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/3-21G
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 3 (C2V)

Jump to S1C1 S1C2
Energy calculated at PBEPBEultrafine/3-21G
 hartrees
Energy at 0K-223.760547
Energy at 298.15K 
HF Energy-223.760547
Nuclear repulsion energy121.865889
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 PBEPBEultrafine/3-21G
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 3610 3577 16.29      
2 A1 3474 3442 1.29      
3 A1 1728 1713 263.82      
4 A1 1633 1619 0.53      
5 A1 1127 1117 0.23      
6 A1 930 921 4.06      
7 A1 471 467 3.68      
8 A2 428 424 0.00      
9 A2 91i 90i 0.00      
10 B1 766 759 75.75      
11 B1 569 564 45.69      
12 B1 402 398 622.60      
13 B2 3606 3573 38.61      
14 B2 3460 3429 22.01      
15 B2 1606 1592 167.26      
16 B2 1387 1374 255.53      
17 B2 968 960 16.94      
18 B2 534 529 12.21      

Unscaled Zero Point Vibrational Energy (zpe) 13304.3 cm-1
Scaled (by 0.9909) Zero Point Vibrational Energy (zpe) 13183.3 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 PBEPBEultrafine/3-21G
ABC
0.35686 0.34231 0.17472

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.147
O2 0.000 0.000 1.397
N3 0.000 1.165 -0.614
N4 0.000 -1.165 -0.614
H5 0.000 2.046 -0.103
H6 0.000 1.184 -1.633
H7 0.000 -2.046 -0.103
H8 0.000 -1.184 -1.633

Atom - Atom Distances (Å)
  C1 O2 N3 N4 H5 H6 H7 H8
C11.25041.39101.39102.06082.13782.06082.1378
O21.25042.32402.32402.53693.25342.53693.2534
N31.39102.32402.32921.01811.01933.25052.5605
N41.39102.32402.32923.25052.56051.01811.0193
H52.06082.53691.01813.25051.75544.09113.5737
H62.13783.25341.01932.56051.75543.57372.3686
H72.06082.53693.25051.01814.09113.57371.7554
H82.13783.25342.56051.01933.57372.36861.7554

picture of Urea state 1 conformation 3
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N3 H5 116.758 C1 N3 H6 124.257
C1 N4 H7 116.758 C1 N4 H8 124.257
O2 C1 N3 123.150 O2 C1 N4 123.150
N3 C1 N4 113.700 H5 N3 H6 118.985
H7 N4 H8 118.985
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.780      
2 O -0.503      
3 N -0.754      
4 N -0.754      
5 H 0.320      
6 H 0.295      
7 H 0.320      
8 H 0.295      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -4.148 4.148
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -25.157 0.000 0.000
y 0.000 -15.891 0.000
z 0.000 0.000 -23.032
Traceless
 xyz
x -5.696 0.000 0.000
y 0.000 8.204 0.000
z 0.000 0.000 -2.508
Polar
3z2-r2-5.017
x2-y2-9.267
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.104 0.000 0.000
y 0.000 4.427 0.000
z 0.000 0.000 4.573


<r2> (average value of r2) Å2
<r2> 69.880
(<r2>)1/2 8.359