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 C3H4O (allenol)

using model chemistry: MP2/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/CEP-31G*
 hartrees
Energy at 0K-34.911861
Energy at 298.15K-34.915099
HF Energy-34.385396
Nuclear repulsion energy53.792863
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 MP2/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' 3773 3582 38.33      
2 A' 3261 3096 5.51      
3 A' 3165 3005 16.73      
4 A' 2042 1939 43.96      
5 A' 1507 1430 39.03      
6 A' 1417 1345 73.36      
7 A' 1275 1211 11.33      
8 A' 1186 1126 131.93      
9 A' 980 931 122.54      
10 A' 861 817 55.44      
11 A' 582 553 22.19      
12 A' 191 181 0.28      
13 A" 3259 3094 9.34      
14 A" 1012 960 1.84      
15 A" 865 822 42.08      
16 A" 600 570 0.09      
17 A" 417 396 137.49      
18 A" 204 193 6.49      

Unscaled Zero Point Vibrational Energy (zpe) 13298.3 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 12625.4 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 MP2/CEP-31G*
ABC
1.39951 0.13839 0.12938

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.681 -0.514 0.000
C2 0.000 0.654 0.000
C3 -0.664 1.834 0.000
O4 0.108 -1.785 0.000
H5 1.773 -0.563 0.000
H6 -0.940 2.329 0.940
H7 -0.940 2.329 -0.940
H8 -0.863 -1.662 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 H5 H6 H7 H8
C11.35192.70611.39411.09303.40523.40521.9241
C21.35191.35432.44122.15062.13892.13892.4715
C32.70611.35433.70073.41871.09801.09803.5020
O41.39412.44123.70072.06464.34854.34850.9790
H51.09302.15063.41872.06464.07574.07572.8556
H63.40522.13891.09804.34854.07571.88104.1013
H73.40522.13891.09804.34854.07571.88104.1013
H81.92412.47153.50200.97902.85564.10134.1013

picture of allenol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 179.110 C1 O4 H8 107.045
C2 C1 O4 125.496 C2 C1 H5 122.849
C2 C3 H6 121.071 C2 C3 H7 121.071
O4 C1 H5 111.655 H6 C3 H7 117.858
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.013      
2 C -0.228      
3 C -0.288      
4 O -0.519      
5 H 0.223      
6 H 0.185      
7 H 0.185      
8 H 0.430      


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.067 0.441 0.000
y 0.441 -25.458 0.000
z 0.000 0.000 -24.980
Traceless
 xyz
x 4.152 0.441 0.000
y 0.441 -2.435 0.000
z 0.000 0.000 -1.717
Polar
3z2-r2-3.434
x2-y24.392
xy0.441
xz0.000
yz0.000


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> 0.000
(<r2>)1/2 0.000