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: HF/SDD

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at HF/SDD
 hartrees
Energy at 0K-262.943889
Energy at 298.15K-262.952440
Nuclear repulsion energy182.589777
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 HF/SDD
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 4028 3626 62.10      
2 A 3912 3522 58.39      
3 A 3875 3489 62.99      
4 A 3322 2991 35.18      
5 A 3264 2939 67.68      
6 A 3199 2880 60.90      
7 A 1843 1660 529.42      
8 A 1794 1616 291.23      
9 A 1676 1509 35.54      
10 A 1654 1489 10.76      
11 A 1639 1476 105.24      
12 A 1594 1435 45.06      
13 A 1565 1410 264.42      
14 A 1308 1178 1.70      
15 A 1264 1138 0.32      
16 A 1233 1110 57.72      
17 A 1181 1064 23.14      
18 A 949 855 5.92      
19 A 867 780 226.18      
20 A 622 560 295.58      
21 A 614 553 12.63      
22 A 599 539 11.10      
23 A 567 511 18.19      
24 A 480 432 170.74      
25 A 309 278 5.21      
26 A 176 158 1.33      
27 A 140 126 0.94      

Unscaled Zero Point Vibrational Energy (zpe) 21835.7 cm-1
Scaled (by 0.9004) Zero Point Vibrational Energy (zpe) 19660.9 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 HF/SDD
ABC
0.33197 0.13739 0.09897

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/SDD

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.896 0.055 0.000
H2 2.009 0.675 0.884
H3 2.701 -0.665 0.002
H4 2.011 0.675 -0.883
H5 0.633 -1.657 -0.001
N6 0.630 -0.663 -0.001
C7 -0.618 -0.105 -0.000
H8 0.104 1.857 -0.001
H9 -1.596 1.664 0.000
N10 -0.688 1.262 -0.000
O11 -1.642 -0.805 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 H5 N6 C7 H8 H9 N10 O11
C11.08501.08001.08502.12811.45562.51912.54133.84462.85193.6413
H21.08501.74751.76722.84872.11482.87892.41033.84062.89794.0371
H31.08001.74751.74752.29352.07023.36513.62004.88693.89814.3446
H41.08501.76721.74752.84832.11502.88042.41103.84262.89964.0388
H52.12812.84872.29352.84830.99391.99253.55293.99873.20312.4285
N61.45562.11482.07022.11500.99391.36692.57393.21992.33272.2766
C72.51912.87893.36512.88041.99251.36692.09022.02131.36861.2405
H82.54132.41033.62002.41103.55292.57392.09021.71010.99023.1829
H93.84463.84064.88693.84263.99873.21992.02131.71010.99282.4692
N102.85192.89793.89812.89963.20312.33271.36860.99020.99282.2762
O113.64134.03714.34464.03882.42852.27661.24053.18292.46922.2762

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 119.448 C1 N6 C7 126.355
H2 C1 H3 107.642 H2 C1 H4 109.053
H2 C1 N6 111.873 H3 C1 H4 107.647
H3 C1 N6 108.563 H4 C1 N6 111.884
H5 N6 C7 114.197 N6 C7 N10 117.022
N6 C7 O11 121.576 C7 N10 H8 123.989
C7 N10 H9 116.837 H8 N10 H9 119.174
N10 C7 O11 121.402
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.440      
2 H 0.201      
3 H 0.205      
4 H 0.201      
5 H 0.392      
6 N -0.598      
7 C 0.601      
8 H 0.379      
9 H 0.396      
10 N -0.833      
11 O -0.503      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  4.737 2.882 -0.002 5.544
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.307 -6.533 0.003
y -6.533 -26.211 -0.001
z 0.003 -0.001 -32.577
Traceless
 xyz
x -3.913 -6.533 0.003
y -6.533 6.732 -0.001
z 0.003 -0.001 -2.818
Polar
3z2-r2-5.637
x2-y2-7.097
xy-6.533
xz0.003
yz-0.001


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.065 0.316 -0.001
y 0.316 5.225 -0.000
z -0.001 -0.000 3.260


<r2> (average value of r2) Å2
<r2> 120.387
(<r2>)1/2 10.972