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All results from a given calculation for C4H6O (Cyclobutanone)

using model chemistry: HF/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/CEP-31G*
 hartrees
Energy at 0K-41.110927
Energy at 298.15K-41.117892
Nuclear repulsion energy90.207150
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 HF/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' 3332 2992 97.93      
2 A' 3302 2966 2.70      
3 A' 3270 2937 31.88      
4 A' 3252 2921 27.70      
5 A' 2065 1855 443.44      
6 A' 1633 1467 0.04      
7 A' 1581 1420 0.94      
8 A' 1386 1245 0.02      
9 A' 1327 1192 0.42      
10 A' 1165 1046 1.26      
11 A' 1037 932 1.12      
12 A' 922 828 0.65      
13 A' 778 698 3.45      
14 A' 726 652 5.80      
15 A' 433 389 3.56      
16 A' 65 58 5.20      
17 A" 3316 2978 3.48      
18 A" 3251 2919 44.51      
19 A" 1576 1415 16.44      
20 A" 1410 1266 11.18      
21 A" 1343 1206 3.00      
22 A" 1315 1180 0.96      
23 A" 1213 1089 72.50      
24 A" 1034 929 0.20      
25 A" 999 897 0.25      
26 A" 684 614 0.04      
27 A" 492 442 10.02      

Unscaled Zero Point Vibrational Energy (zpe) 21452.6 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 19264.4 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 HF/CEP-31G*
ABC
0.35859 0.16006 0.11857

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 -0.117 1.892 0.000
C2 0.000 0.703 0.000
C3 0.072 -0.360 1.112
C4 0.072 -0.360 -1.112
C5 -0.052 -1.454 0.000
H6 -1.021 -1.951 0.000
H7 0.731 -2.209 0.000
H8 1.035 -0.348 1.623
H9 1.035 -0.348 -1.623
H10 -0.724 -0.306 1.853
H11 -0.724 -0.306 -1.853

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
O11.19442.51872.51873.34693.94744.18772.99642.99642.93772.9377
C21.19441.54051.54052.15832.84353.00272.19342.19342.23042.2304
C32.51871.54052.22501.56562.22782.25621.09002.90021.08863.0708
C42.51871.54052.22501.56562.22782.25622.90021.09003.07081.0886
C53.34692.15831.56561.56561.08821.08742.24562.24562.28112.2811
H63.94742.84352.22782.22781.08821.77023.07113.07112.49552.4955
H74.18773.00272.25622.25621.08741.77022.48862.48863.02843.0284
H82.99642.19341.09002.90022.24563.07112.48863.24631.77453.8960
H92.99642.19342.90021.09002.24563.07112.48863.24633.89601.7745
H102.93772.23041.08863.07082.28112.49553.02841.77453.89603.7057
H112.93772.23043.07081.08862.28112.49553.02843.89601.77453.7057

picture of Cyclobutanone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 133.742 O1 C2 C4 133.742
C2 C3 C5 88.027 C2 C3 H8 111.844
C2 C3 H10 114.985 C2 C4 C5 88.027
C2 C4 H9 111.844 C2 C4 H11 114.985
C3 C2 C4 92.465 C3 C5 C4 90.564
C3 C5 H6 112.940 C3 C5 H7 115.333
C4 C5 H6 112.940 C4 C5 H7 115.333
C5 C3 H8 114.278 C5 C3 H10 117.376
C5 C4 H9 114.278 C5 C4 H11 117.376
H6 C5 H7 108.909 H8 C3 H10 109.082
H9 C4 H11 109.082
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.155      
2 C -0.084      
3 C -0.178      
4 C -0.178      
5 C -0.245      
6 H 0.119      
7 H 0.143      
8 H 0.135      
9 H 0.135      
10 H 0.154      
11 H 0.154      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.340 -3.340 0.000 3.357
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.163 0.510 0.000
y 0.510 -37.792 0.000
z 0.000 0.000 -28.862
Traceless
 xyz
x 5.164 0.510 0.000
y 0.510 -9.280 0.000
z 0.000 0.000 4.116
Polar
3z2-r28.232
x2-y29.629
xy0.510
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.652 -0.095 0.000
y -0.095 6.907 0.000
z 0.000 0.000 6.231


<r2> (average value of r2) Å2
<r2> 88.742
(<r2>)1/2 9.420