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: mPW1PW91/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at mPW1PW91/3-21G
 hartrees
Energy at 0K-190.756804
Energy at 298.15K-190.760318
Nuclear repulsion energy101.445478
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 mPW1PW91/3-21G
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' 3579 3417 14.77      
2 A' 3236 3089 3.26      
3 A' 3132 2990 12.83      
4 A' 2106 2010 22.40      
5 A' 1542 1472 20.24      
6 A' 1434 1369 53.66      
7 A' 1337 1276 0.58      
8 A' 1213 1158 102.21      
9 A' 966 923 164.86      
10 A' 964 920 23.54      
11 A' 621 593 24.90      
12 A' 206 197 0.72      
13 A" 3201 3055 7.95      
14 A" 1083 1034 0.00      
15 A" 947 904 35.82      
16 A" 641 612 1.35      
17 A" 457 436 169.37      
18 A" 266 254 4.05      

Unscaled Zero Point Vibrational Energy (zpe) 13465.3 cm-1
Scaled (by 0.9546) Zero Point Vibrational Energy (zpe) 12854.0 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 mPW1PW91/3-21G
ABC
1.46137 0.14334 0.13411

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.654 -0.475 0.000
C2 0.000 0.656 0.000
C3 -0.655 1.784 0.000
O4 0.127 -1.767 0.000
H5 1.736 -0.511 0.000
H6 -0.940 2.284 0.924
H7 -0.940 2.284 -0.924
H8 -0.861 -1.716 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 O4 H5 H6 H7 H8
C11.30612.61031.39531.08263.31733.31731.9586
C21.30611.30432.42592.09152.09472.09472.5232
C32.61031.30433.63543.31391.08871.08873.5054
O41.39532.42593.63542.04124.28934.28930.9896
H51.08262.09153.31392.04123.97813.97812.8632
H63.31732.09471.08874.28933.97811.84814.1054
H73.31732.09471.08874.28933.97811.84814.1054
H81.95862.52323.50540.98962.86324.10544.1054

picture of allenol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 179.886 C1 O4 H8 109.238
C2 C1 O4 127.764 C2 C1 H5 121.954
C2 C3 H6 121.919 C2 C3 H7 121.919
O4 C1 H5 110.282 H6 C3 H7 116.160
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.072      
2 C 0.029      
3 C -0.507      
4 O -0.552      
5 H 0.259      
6 H 0.235      
7 H 0.235      
8 H 0.375      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.208 0.814 0.000 1.457
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -20.788 1.010 0.000
y 1.010 -24.176 0.000
z 0.000 0.000 -24.313
Traceless
 xyz
x 3.457 1.010 0.000
y 1.010 -1.625 0.000
z 0.000 0.000 -1.831
Polar
3z2-r2-3.663
x2-y23.388
xy1.010
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.030 -2.162 0.000
y -2.162 7.770 0.000
z 0.000 0.000 2.305


<r2> (average value of r2) Å2
<r2> 88.550
(<r2>)1/2 9.410