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All results from a given calculation for C3H4O (Cyclopropanone)

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-34.319020
Energy at 298.15K-34.323394
HF Energy-34.319020
Nuclear repulsion energy57.574626
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 A1 3329 3001 0.10      
2 A1 2029 1829 312.06      
3 A1 1587 1431 1.41      
4 A1 1184 1067 20.97      
5 A1 1124 1013 0.57      
6 A1 757 682 25.70      
7 A2 3423 3085 0.00      
8 A2 1265 1140 0.00      
9 A2 795 717 0.00      
10 B1 3437 3099 30.22      
11 B1 1228 1107 0.68      
12 B1 780 703 3.47      
13 B1 372 336 10.55      
14 B2 3322 2994 11.48      
15 B2 1564 1410 11.02      
16 B2 1229 1108 3.67      
17 B2 1106 997 152.19      
18 B2 516 465 8.83      

Unscaled Zero Point Vibrational Energy (zpe) 14523.2 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 13091.3 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
0.66713 0.24249 0.19130

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.408
O2 0.000 0.000 1.624
C3 0.000 0.795 -0.849
C4 0.000 -0.795 -0.849
H5 0.909 1.296 -1.146
H6 -0.909 1.296 -1.146
H7 -0.909 -1.296 -1.146
H8 0.909 -1.296 -1.146

Atom - Atom Distances (Å)
  C1 O2 C3 C4 H5 H6 H7 H8
C11.21671.48731.48732.21782.21782.21782.2178
O21.21672.59832.59833.19043.19043.19043.1904
C31.48732.59831.58991.07951.07952.29912.2991
C41.48732.59831.58992.29912.29911.07951.0795
H52.21783.19041.07952.29911.81833.16592.5917
H62.21783.19041.07952.29911.81832.59173.1659
H72.21783.19042.29911.07953.16592.59171.8183
H82.21783.19042.29911.07952.59173.16591.8183

picture of Cyclopropanone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C4 57.690 C1 C3 H5 118.687
C1 C3 H6 118.687 C1 C4 C3 57.690
C1 C4 H7 118.687 C1 C4 H8 118.687
O2 C1 C3 147.690 O2 C1 C4 147.690
C3 C1 C4 64.620 C3 C4 H7 117.645
C3 C4 H8 117.645 C4 C3 H5 117.645
C4 C3 H6 117.645 H5 C3 H6 114.752
H7 C4 H8 114.752
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 C 0.055      
2 O -0.133      
3 C -0.300      
4 C -0.300      
5 H 0.170      
6 H 0.170      
7 H 0.170      
8 H 0.170      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -3.722 3.722
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.605 0.000 0.000
y 0.000 -22.996 0.000
z 0.000 0.000 -30.725
Traceless
 xyz
x 5.256 0.000 0.000
y 0.000 3.169 0.000
z 0.000 0.000 -8.424
Polar
3z2-r2-16.848
x2-y21.391
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.281 0.000 0.000
y 0.000 4.708 0.000
z 0.000 0.000 5.572


<r2> (average value of r2) Å2
<r2> 58.278
(<r2>)1/2 7.634