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: B3PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B3PW91/3-21G
 hartrees
Energy at 0K-263.015575
Energy at 298.15K-263.023640
Nuclear repulsion energy181.783395
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 B3PW91/3-21G
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 3722 3578 38.25      
2 A 3634 3493 38.65      
3 A 3593 3454 28.16      
4 A 3141 3019 13.20      
5 A 3050 2932 51.27      
6 A 3008 2891 44.87      
7 A 1779 1710 348.86      
8 A 1672 1607 109.22      
9 A 1587 1525 37.56      
10 A 1554 1493 8.38      
11 A 1514 1456 64.80      
12 A 1470 1413 1.41      
13 A 1412 1358 231.18      
14 A 1204 1157 1.61      
15 A 1167 1122 1.18      
16 A 1136 1092 29.41      
17 A 1077 1035 25.51      
18 A 890 855 5.21      
19 A 807 776 121.90      
20 A 571 548 7.68      
21 A 560 538 171.24      
22 A 532 511 9.30      
23 A 483 465 0.72      
24 A 385 370 236.96      
25 A 292 281 3.87      
26 A 154 148 3.64      
27 A 75 72 5.68      

Unscaled Zero Point Vibrational Energy (zpe) 20234.7 cm-1
Scaled (by 0.9612) Zero Point Vibrational Energy (zpe) 19449.6 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 B3PW91/3-21G
ABC
0.32976 0.13725 0.09874

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.883 0.026 -0.000
H2 2.004 0.656 0.894
H3 2.698 -0.704 -0.002
H4 2.002 0.657 -0.894
H5 0.607 -1.699 0.000
N6 0.615 -0.688 0.001
C7 -0.636 -0.102 0.000
H8 0.221 1.833 0.001
H9 -1.516 1.740 0.000
N10 -0.619 1.275 -0.000
O11 -1.684 -0.767 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 H5 N6 C7 H8 H9 N10 O11
C11.10031.09341.10042.14541.45492.52282.45523.80702.79733.6548
H21.10031.76991.78752.87972.12842.88832.31523.78982.83974.0529
H31.09341.76991.76982.31512.08243.38773.54504.87103.86264.3824
H41.10041.78751.76982.87992.12832.88672.31333.78742.83714.0513
H52.14542.87972.31512.87991.01132.02373.55294.04143.21722.4736
N61.45492.12842.08242.12831.01131.38162.55123.23042.31902.3010
C72.52282.88833.38772.88672.02371.38162.11682.04141.37771.2414
H82.45522.31523.54502.31333.55292.55122.11681.73991.00883.2240
H93.80703.78984.87103.78744.04143.23042.04141.73991.00992.5130
N102.79732.83973.86262.83713.21722.31901.37771.00881.00992.3038
O113.65484.05294.38244.05132.47362.30101.24143.22402.51302.3038

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 119.817 C1 N6 C7 125.571
H2 C1 H3 107.568 H2 C1 H4 108.633
H2 C1 N6 112.061 H3 C1 H4 107.557
H3 C1 N6 108.776 H4 C1 N6 112.050
H5 N6 C7 114.612 N6 C7 N10 114.364
N6 C7 O11 122.531 C7 N10 H8 124.258
C7 N10 H9 116.680 H8 N10 H9 119.062
N10 C7 O11 123.105
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.449      
2 H 0.216      
3 H 0.237      
4 H 0.216      
5 H 0.340      
6 N -0.736      
7 C 0.879      
8 H 0.326      
9 H 0.337      
10 N -0.819      
11 O -0.549      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  3.758 2.189 0.002 4.349
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.981 -5.030 -0.006
y -5.030 -24.403 0.008
z -0.006 0.008 -31.400
Traceless
 xyz
x -3.080 -5.030 -0.006
y -5.030 6.788 0.008
z -0.006 0.008 -3.708
Polar
3z2-r2-7.416
x2-y2-6.579
xy-5.030
xz-0.006
yz0.008


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


<r2> (average value of r2) Å2
<r2> 119.525
(<r2>)1/2 10.933