return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C2H6N2O (Urea, methyl-)

using model chemistry: PBEPBE/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at PBEPBE/6-311G*
 hartrees
Energy at 0K-264.326232
Energy at 298.15K-264.334230
Nuclear repulsion energy181.677396
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 PBEPBE/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 A 3603 3566 17.22      
2 A 3561 3524 22.19      
3 A 3485 3449 6.25      
4 A 3063 3031 19.37      
5 A 2979 2948 47.33      
6 A 2935 2904 58.14      
7 A 1759 1741 405.75      
8 A 1616 1599 124.68      
9 A 1493 1477 37.71      
10 A 1459 1444 13.33      
11 A 1449 1434 58.38      
12 A 1417 1402 14.73      
13 A 1368 1354 136.75      
14 A 1173 1161 2.69      
15 A 1123 1112 18.24      
16 A 1114 1102 15.18      
17 A 1051 1040 34.10      
18 A 868 859 3.89      
19 A 751 743 50.87      
20 A 589 583 49.12      
21 A 554 548 147.46      
22 A 523 517 17.63      
23 A 476 471 33.09      
24 A 380 376 114.12      
25 A 268 265 3.77      
26 A 149 147 4.38      
27 A 99 98 4.95      

Unscaled Zero Point Vibrational Energy (zpe) 19651.6 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 19447.2 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 PBEPBE/6-311G*
ABC
0.32379 0.13774 0.09935

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.880 0.046 0.085
H2 -2.109 0.767 -0.720
H3 -2.704 -0.680 0.101
H4 -1.877 0.589 1.047
H5 -0.625 -1.668 -0.043
N6 -0.635 -0.661 -0.164
C7 0.630 -0.113 -0.021
H8 -0.064 1.810 -0.437
H9 1.593 1.653 -0.067
N10 0.655 1.281 0.051
O11 1.643 -0.802 0.065

Atom - Atom Distances (Å)
  C1 H2 H3 H4 H5 N6 C7 H8 H9 N10 O11
C11.10501.09801.10442.12841.45342.51742.58503.82982.82043.6235
H21.10501.76681.79062.93132.12672.96072.31303.86232.91554.1420
H31.09801.76681.78572.30642.08633.38413.66844.89213.88994.3484
H41.10441.79061.78572.80212.13792.81402.64153.79632.80753.9098
H52.12842.93132.30642.80211.01481.99893.54493.99373.21662.4300
N61.45342.12672.08632.13791.01481.38562.55013.21302.34092.2931
C72.51742.96073.38412.81401.99891.38562.08562.01141.39581.2281
H82.58502.31303.66842.64153.54492.55012.08561.70501.01703.1601
H93.82983.86234.89213.79633.99373.21302.01141.70501.01562.4589
N102.82042.91553.88992.80753.21662.34091.39581.01701.01562.3054
O113.62354.14204.34843.90982.43002.29311.22813.16012.45892.3054

picture of Urea, methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N6 H5 118.061 C1 N6 C7 124.912
H2 C1 H3 106.645 H2 C1 H4 108.281
H2 C1 N6 111.733 H3 C1 H4 108.349
H3 C1 N6 108.910 H4 C1 N6 112.694
H5 N6 C7 111.835 N6 C7 N10 114.624
N6 C7 O11 122.533 C7 N10 H8 118.780
C7 N10 H9 112.086 H8 N10 H9 114.027
N10 C7 O11 122.822
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.539      
2 H 0.217      
3 H 0.229      
4 H 0.233      
5 H 0.339      
6 N -0.546      
7 C 0.514      
8 H 0.329      
9 H 0.343      
10 N -0.754      
11 O -0.366      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -3.300 1.853 -0.649 3.840
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.317 5.233 -0.885
y 5.233 -26.327 -2.128
z -0.885 -2.128 -31.876
Traceless
 xyz
x -2.215 5.233 -0.885
y 5.233 5.269 -2.128
z -0.885 -2.128 -3.054
Polar
3z2-r2-6.108
x2-y2-4.990
xy5.233
xz-0.885
yz-2.128


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.643 -0.075 0.132
y -0.075 6.521 -0.078
z 0.132 -0.078 4.020


<r2> (average value of r2) Å2
<r2> 119.928
(<r2>)1/2 10.951