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: LSDA/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at LSDA/3-21G*
 hartrees
Energy at 0K-189.777662
Energy at 298.15K-189.781100
Nuclear repulsion energy101.412310
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 LSDA/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' 3405 3344 10.33      
2 A' 3121 3065 1.70      
3 A' 3024 2970 11.88      
4 A' 2071 2033 25.03      
5 A' 1483 1456 27.58      
6 A' 1378 1353 44.94      
7 A' 1315 1291 0.44      
8 A' 1189 1168 107.39      
9 A' 955 938 108.15      
10 A' 914 897 58.12      
11 A' 608 597 24.95      
12 A' 196 193 1.06      
13 A" 3088 3032 6.59      
14 A" 1032 1013 0.59      
15 A" 906 890 44.08      
16 A" 625 614 2.28      
17 A" 490 481 152.12      
18 A" 249 244 3.38      

Unscaled Zero Point Vibrational Energy (zpe) 13023.4 cm-1
Scaled (by 0.982) Zero Point Vibrational Energy (zpe) 12788.9 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 LSDA/3-21G*
ABC
1.46257 0.14350 0.13431

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.652 -0.479 0.000
C2 0.000 0.655 0.000
C3 -0.660 1.780 0.000
O4 0.134 -1.762 0.000
H5 1.746 -0.512 0.000
H6 -0.952 2.289 0.931
H7 -0.952 2.289 -0.931
H8 -0.869 -1.705 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 H5 H6 H7 H8
C11.30842.61241.38361.09483.33203.33201.9530
C21.30841.30412.42112.10072.10772.10772.5146
C32.61241.30413.63013.32351.10041.10043.4908
O41.38362.42113.63012.03984.29644.29641.0046
H51.09482.10073.32352.03983.99953.99952.8740
H63.33202.10771.10044.29643.99951.86174.1015
H73.33202.10771.10044.29643.99951.86174.1015
H81.95302.51463.49081.00462.87404.10154.1015

picture of allenol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 179.485 C1 O4 H8 108.688
C2 C1 O4 128.133 C2 C1 H5 121.631
C2 C3 H6 122.229 C2 C3 H7 122.229
O4 C1 H5 110.236 H6 C3 H7 115.538
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.152      
2 C 0.111      
3 C -0.539      
4 O -0.490      
5 H 0.250      
6 H 0.226      
7 H 0.226      
8 H 0.368      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.264 0.534 0.000 1.373
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.885 1.139 0.000
y 1.139 -23.852 0.000
z 0.000 0.000 -24.329
Traceless
 xyz
x 3.206 1.139 0.000
y 1.139 -1.245 0.000
z 0.000 0.000 -1.960
Polar
3z2-r2-3.921
x2-y22.967
xy1.139
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.172 -2.122 0.000
y -2.122 7.972 0.000
z 0.000 0.000 2.395


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000