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: QCISD/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/6-311G**
 hartrees
Energy at 0K-191.405506
Energy at 298.15K-191.408917
HF Energy-190.763190
Nuclear repulsion energy101.746163
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 QCISD/6-311G**
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' 3895 3716 36.32      
2 A' 3227 3079 5.72      
3 A' 3136 2992 15.08      
4 A' 2060 1965 35.93      
5 A' 1524 1454 52.68      
6 A' 1445 1379 49.21      
7 A' 1319 1258 7.69      
8 A' 1214 1158 123.59      
9 A' 996 950 100.52      
10 A' 917 875 31.37      
11 A' 621 593 23.92      
12 A' 209 200 0.45      
13 A" 3214 3066 8.19      
14 A" 1045 998 2.38      
15 A" 904 862 24.20      
16 A" 626 597 0.20      
17 A" 379 362 115.01      
18 A" 256 244 6.37      

Unscaled Zero Point Vibrational Energy (zpe) 13493.1 cm-1
Scaled (by 0.9541) Zero Point Vibrational Energy (zpe) 12873.8 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 QCISD/6-311G**
ABC
1.45406 0.14423 0.13486

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.663 -0.493 0.000
C2 0.000 0.645 0.000
C3 -0.656 1.787 0.000
O4 0.115 -1.753 0.000
H5 1.747 -0.526 0.000
H6 -0.936 2.282 0.929
H7 -0.936 2.282 -0.929
H8 -0.839 -1.647 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 H5 H6 H7 H8
C11.31692.63411.37401.08513.33433.33431.8940
C21.31691.31722.40102.10322.10182.10182.4410
C32.63411.31723.62363.33531.08891.08893.4396
O41.37402.40103.62362.04214.27184.27180.9601
H51.08512.10323.33532.04213.99313.99312.8190
H63.33432.10181.08894.27183.99311.85774.0384
H73.33432.10181.08894.27183.99311.85774.0384
H81.89402.44103.43960.96012.81904.03844.0384

picture of allenol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 179.639 C1 O4 H8 107.142
C2 C1 O4 126.311 C2 C1 H5 121.938
C2 C3 H6 121.457 C2 C3 H7 121.457
O4 C1 H5 111.751 H6 C3 H7 117.084
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at QCISD/6-311G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.129      
2 C -0.181      
3 C -0.197      
4 O -0.409      
5 H 0.136      
6 H 0.133      
7 H 0.133      
8 H 0.257      


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.374 0.752 -0.002
y 0.752 -25.031 -0.003
z -0.002 -0.003 -24.689
Traceless
 xyz
x 3.486 0.752 -0.002
y 0.752 -2.000 -0.003
z -0.002 -0.003 -1.486
Polar
3z2-r2-2.973
x2-y23.657
xy0.752
xz-0.002
yz-0.003


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> 88.450
(<r2>)1/2 9.405