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: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-262.997383
Energy at 298.15K-263.005549
Nuclear repulsion energy182.319404
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 B1B95/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3727 3566 37.79      
2 A 3642 3485 40.33      
3 A 3598 3442 28.40      
4 A 3157 3021 12.76      
5 A 3060 2927 49.81      
6 A 3017 2886 42.55      
7 A 1789 1712 358.01      
8 A 1677 1605 111.45      
9 A 1590 1521 38.98      
10 A 1559 1491 8.60      
11 A 1517 1451 63.38      
12 A 1468 1404 2.40      
13 A 1416 1355 226.84      
14 A 1207 1155 1.66      
15 A 1169 1118 0.95      
16 A 1138 1089 28.29      
17 A 1083 1036 26.62      
18 A 896 857 5.05      
19 A 808 773 125.25      
20 A 573 548 7.64      
21 A 564 539 178.50      
22 A 533 510 9.34      
23 A 489 468 1.05      
24 A 385 368 217.24      
25 A 312 299 4.17      
26 A 199 190 9.85      
27 A 74 70 6.62      

Unscaled Zero Point Vibrational Energy (zpe) 20322.6 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 19442.6 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 B1B95/3-21G
ABC
0.33171 0.13840 0.09950

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.872 0.021 0.000
H2 1.985 0.652 0.892
H3 2.688 -0.703 0.001
H4 1.987 0.651 -0.892
H5 0.599 -1.705 -0.001
N6 0.609 -0.695 -0.001
C7 -0.635 -0.102 -0.000
H8 0.247 1.818 -0.002
H9 -1.489 1.749 0.000
N10 -0.600 1.273 0.000
O11 -1.688 -0.753 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 H5 N6 C7 H8 H9 N10 O11
C11.09811.09081.09812.14451.45212.51042.42313.77982.77183.6435
H21.09811.76721.78372.87582.12222.86852.27603.75112.80484.0324
H31.09081.76721.76722.31722.07943.37733.50934.84413.83684.3766
H41.09811.78371.76722.87562.12232.86982.27603.75292.80634.0338
H52.14452.87582.31722.87561.00962.02273.54004.03593.21022.4767
N61.45212.12222.07942.12231.00961.37832.53903.22132.31022.2977
C72.51042.86853.37732.86982.02271.37832.11272.03851.37551.2382
H82.42312.27603.50932.27603.54002.53902.11271.73761.00743.2180
H93.77983.75114.84413.75294.03593.22132.03851.73761.00822.5104
N102.77182.80483.83682.80633.21022.31021.37551.00741.00822.3000
O113.64354.03244.37664.03382.47672.29771.23823.21802.51042.3000

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 120.119 C1 N6 C7 124.964
H2 C1 H3 107.675 H2 C1 H4 108.620
H2 C1 N6 111.900 H3 C1 H4 107.671
H3 C1 N6 108.890 H4 C1 N6 111.909
H5 N6 C7 114.917 N6 C7 N10 114.052
N6 C7 O11 122.754 C7 N10 H8 124.176
C7 N10 H9 116.720 H8 N10 H9 119.104
N10 C7 O11 123.194
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.434      
2 H 0.212      
3 H 0.233      
4 H 0.212      
5 H 0.337      
6 N -0.736      
7 C 0.875      
8 H 0.323      
9 H 0.334      
10 N -0.811      
11 O -0.545      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  3.774 2.139 -0.002 4.338
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.056 -4.942 0.002
y -4.942 -24.361 -0.004
z 0.002 -0.004 -31.360
Traceless
 xyz
x -3.196 -4.942 0.002
y -4.942 6.847 -0.004
z 0.002 -0.004 -3.651
Polar
3z2-r2-7.302
x2-y2-6.695
xy-4.942
xz0.002
yz-0.004


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.294 0.151 -0.001
y 0.151 5.329 -0.000
z -0.001 -0.000 2.611


<r2> (average value of r2) Å2
<r2> 118.724
(<r2>)1/2 10.896