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/CEP-31G

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/CEP-31G
 hartrees
Energy at 0K-49.430687
Energy at 298.15K-49.439219
Nuclear repulsion energy101.970961
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/CEP-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 A 4034 3636 56.62      
2 A 3915 3529 52.66      
3 A 3877 3495 55.30      
4 A 3333 3004 56.25      
5 A 3274 2951 87.91      
6 A 3207 2891 71.88      
7 A 1831 1651 464.09      
8 A 1780 1605 337.26      
9 A 1662 1498 31.78      
10 A 1640 1478 9.15      
11 A 1633 1472 93.12      
12 A 1579 1424 55.59      
13 A 1556 1403 278.41      
14 A 1303 1175 1.07      
15 A 1262 1137 0.63      
16 A 1227 1106 56.58      
17 A 1177 1061 22.82      
18 A 946 853 5.28      
19 A 851 767 218.63      
20 A 618 557 303.43      
21 A 608 548 12.83      
22 A 591 533 15.89      
23 A 563 507 18.98      
24 A 476 429 184.92      
25 A 304 274 5.15      
26 A 181 163 2.02      
27 A 138 125 0.73      

Unscaled Zero Point Vibrational Energy (zpe) 21782.5 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 19634.7 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/CEP-31G
ABC
0.32777 0.13599 0.09788

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.876 0.064 0.000
H2 1.977 0.690 0.887
H3 2.695 -0.648 0.001
H4 1.978 0.689 -0.887
H5 0.630 -1.676 -0.001
N6 0.616 -0.679 -0.001
C7 -0.645 -0.132 -0.000
H8 0.052 1.852 -0.001
H9 -1.651 1.631 0.000
N10 -0.733 1.243 -0.000
O11 -1.670 -0.848 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 H5 N6 C7 H8 H9 N10 O11
C11.09021.08521.09022.14081.46252.52892.55443.85972.86353.6618
H21.09021.75821.77452.86392.12402.88732.41773.85162.90494.0561
H31.08521.75821.75832.30662.07843.37953.63834.90733.91524.3693
H41.09021.77451.75832.86352.12422.88852.41833.85332.90634.0574
H52.14082.86392.30662.86350.99762.00273.57564.01753.22182.4443
N61.46252.12402.07842.12420.99761.37512.59333.23682.34842.2928
C72.52892.88733.37952.88852.00271.37512.10312.02961.37761.2507
H82.55442.41773.63832.41833.57562.59332.10311.71760.99413.2031
H93.85973.85164.90733.85334.01753.23682.02961.71760.99642.4795
N102.86352.90493.91522.90633.22182.34841.37760.99410.99642.2916
O113.66184.05614.36934.05742.44432.29281.25073.20312.47952.2916

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 119.768 C1 N6 C7 126.031
H2 C1 H3 107.851 H2 C1 H4 108.948
H2 C1 N6 111.800 H3 C1 H4 107.852
H3 C1 N6 108.426 H4 C1 N6 111.808
H5 N6 C7 114.202 N6 C7 N10 117.112
N6 C7 O11 121.598 C7 N10 H8 124.132
C7 N10 H9 116.589 H8 N10 H9 119.279
N10 C7 O11 121.290
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.331      
2 H 0.148      
3 H 0.171      
4 H 0.148      
5 H 0.384      
6 N -0.352      
7 C 0.000      
8 H 0.364      
9 H 0.381      
10 N -0.587      
11 O -0.328      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  4.848 3.046 -0.002 5.725
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -33.600 -7.023 0.002
y -7.023 -26.412 -0.001
z 0.002 -0.001 -32.529
Traceless
 xyz
x -4.129 -7.023 0.002
y -7.023 6.652 -0.001
z 0.002 -0.001 -2.523
Polar
3z2-r2-5.046
x2-y2-7.188
xy-7.023
xz0.002
yz-0.001


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.020 0.368 -0.001
y 0.368 5.177 0.000
z -0.001 0.000 3.310


<r2> (average value of r2) Å2
<r2> 100.825
(<r2>)1/2 10.041