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/SDD

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/SDD
 hartrees
Energy at 0K-191.038127
Energy at 298.15K-191.041472
HF Energy-190.658837
Nuclear repulsion energy99.166582
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/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' 3641 3515 28.35      
2 A' 3255 3142 5.97      
3 A' 3120 3012 15.92      
4 A' 1986 1917 24.74      
5 A' 1520 1467 11.21      
6 A' 1399 1351 46.20      
7 A' 1258 1214 2.23      
8 A' 1149 1110 106.29      
9 A' 945 912 89.60      
10 A' 912 880 121.55      
11 A' 586 566 23.89      
12 A' 204 197 0.32      
13 A" 3217 3105 14.44      
14 A" 1063 1026 0.30      
15 A" 904 872 40.86      
16 A" 614 592 0.01      
17 A" 400 387 192.77      
18 A" 252 243 3.37      

Unscaled Zero Point Vibrational Energy (zpe) 13212.0 cm-1
Scaled (by 0.9653) Zero Point Vibrational Energy (zpe) 12753.6 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 MP2/SDD
ABC
1.37206 0.13709 0.12797

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/SDD

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.684 -0.485 0.000
C2 0.000 0.667 0.000
C3 -0.667 1.833 0.000
O4 0.113 -1.804 0.000
H5 1.771 -0.553 0.000
H6 -0.949 2.332 0.935
H7 -0.949 2.332 -0.935
H8 -0.873 -1.769 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 H5 H6 H7 H8
C11.34022.68351.43681.08863.38793.38792.0178
C21.34021.34342.47332.15032.13212.13212.5876
C32.68351.34343.71943.41131.09631.09633.6076
O41.43682.47333.71942.07664.37074.37070.9863
H51.08862.15033.41132.07664.07364.07362.9096
H63.38792.13211.09634.37074.07361.86934.2064
H73.38792.13211.09634.37074.07361.86934.2064
H82.01782.58763.60760.98632.90964.20644.2064

picture of allenol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 179.096 C1 O4 H8 111.408
C2 C1 O4 125.874 C2 C1 H5 124.262
C2 C3 H6 121.509 C2 C3 H7 121.509
O4 C1 H5 109.864 H6 C3 H7 116.981
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.029      
2 C -0.049      
3 C -0.413      
4 O -0.620      
5 H 0.232      
6 H 0.208      
7 H 0.208      
8 H 0.405      


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.321 0.897 0.000
y 0.897 -26.452 0.000
z 0.000 0.000 -25.417
Traceless
 xyz
x 4.614 0.897 0.000
y 0.897 -3.083 0.000
z 0.000 0.000 -1.531
Polar
3z2-r2-3.062
x2-y25.131
xy0.897
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