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All results from a given calculation for C3H4O (Cyclopropanone)

using model chemistry: HF/3-21G

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/3-21G
 hartrees
Energy at 0K-189.653306
Energy at 298.15K-189.657793
HF Energy-189.653306
Nuclear repulsion energy109.087970
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/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 A1 3315 3002 0.55      
2 A1 2078 1882 240.93      
3 A1 1590 1440 7.03      
4 A1 1199 1086 45.18      
5 A1 1070 969 0.06      
6 A1 755 684 11.04      
7 A2 3392 3072 0.00      
8 A2 1276 1156 0.00      
9 A2 789 715 0.00      
10 B1 3406 3085 0.98      
11 B1 1248 1130 0.36      
12 B1 792 717 1.97      
13 B1 457 414 5.87      
14 B2 3310 2998 1.19      
15 B2 1571 1422 10.83      
16 B2 1245 1127 0.67      
17 B2 1069 968 182.85      
18 B2 554 502 4.22      

Unscaled Zero Point Vibrational Energy (zpe) 14558.2 cm-1
Scaled (by 0.9056) Zero Point Vibrational Energy (zpe) 13183.9 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 HF/3-21G
ABC
0.68263 0.24944 0.19685

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.383
O2 0.000 0.000 1.578
C3 0.000 0.786 -0.858
C4 0.000 -0.786 -0.858
H5 0.907 1.276 -1.156
H6 -0.907 1.276 -1.156
H7 -0.907 -1.276 -1.156
H8 0.907 -1.276 -1.156

Atom - Atom Distances (Å)
  C1 O2 C3 C4 H5 H6 H7 H8
C11.19521.46861.46862.19492.19492.19492.1949
O21.19522.55952.55953.15023.15023.15023.1502
C31.46862.55951.57151.07331.07332.27172.2717
C41.46862.55951.57152.27172.27171.07331.0733
H52.19493.15021.07332.27171.81483.13072.5510
H62.19493.15021.07332.27171.81482.55103.1307
H72.19493.15022.27171.07333.13072.55101.8148
H82.19493.15022.27171.07332.55103.13071.8148

picture of Cyclopropanone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C4 57.655 C1 C3 H5 118.591
C1 C3 H6 118.591 C1 C4 C3 57.655
C1 C4 H7 118.591 C1 C4 H8 118.591
O2 C1 C3 147.655 O2 C1 C4 147.655
C3 C1 C4 64.690 C3 C4 H7 117.151
C3 C4 H8 117.151 C4 C3 H5 117.151
C4 C3 H6 117.151 H5 C3 H6 115.439
H7 C4 H8 115.439
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.445      
2 O -0.534      
3 C -0.488      
4 C -0.488      
5 H 0.266      
6 H 0.266      
7 H 0.266      
8 H 0.266      


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 -3.011 3.011
CHELPG 0.000 0.000 -3.028 3.028
AIM        
ESP 0.013 0.000 -2.995 2.995


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -21.640 0.000 0.000
y 0.000 -22.978 0.000
z 0.000 0.000 -29.238
Traceless
 xyz
x 4.467 0.000 0.000
y 0.000 2.461 0.000
z 0.000 0.000 -6.929
Polar
3z2-r2-13.857
x2-y21.337
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.242 0.000 0.000
y 0.000 4.212 0.000
z 0.000 0.000 4.649


<r2> (average value of r2) Å2
<r2> 67.561
(<r2>)1/2 8.220