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All results from a given calculation for C2H4O2 (1,3-dioxetane)

using model chemistry: LSDA/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at LSDA/6-31+G**
 hartrees
Energy at 0K-227.851244
Energy at 298.15K-227.856761
Nuclear repulsion energy131.116132
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/6-31+G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 2919 2875 0.00      
2 Ag 1512 1489 0.00      
3 Ag 1137 1120 0.00      
4 Ag 865 852 0.00      
5 Au 1083 1067 0.00      
6 B1g 1291 1272 0.00      
7 B1g 1038 1023 0.00      
8 B1u 2954 2910 127.47      
9 B1u 1133 1116 12.87      
10 B1u 83 82 11.61      
11 B2g 2953 2908 0.00      
12 B2g 1087 1071 0.00      
13 B2u 1379 1359 17.06      
14 B2u 955 940 111.24      
15 B3g 994 979 0.00      
16 B3u 2902 2858 225.33      
17 B3u 1475 1453 11.51      
18 B3u 1104 1088 258.50      

Unscaled Zero Point Vibrational Energy (zpe) 13432.3 cm-1
Scaled (by 0.985) Zero Point Vibrational Energy (zpe) 13230.8 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/6-31+G**
ABC
0.46155 0.45105 0.25104

See section I.F.4 to change rotational constant units
Geometric Data calculated at LSDA/6-31+G**

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.974 0.000 0.000
C2 0.974 0.000 0.000
O3 0.000 1.031 0.000
O4 0.000 -1.031 0.000
H5 -1.605 0.000 0.915
H6 1.605 0.000 0.915
H7 -1.605 0.000 -0.915
H8 1.605 0.000 -0.915

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8
C11.94781.41821.41821.11152.73651.11152.7365
C21.94781.41821.41822.73651.11152.73651.1115
O31.41821.41822.06192.11572.11572.11572.1157
O41.41821.41822.06192.11572.11572.11572.1157
H51.11152.73652.11572.11573.21031.82973.6951
H62.73651.11152.11572.11573.21033.69511.8297
H71.11152.73652.11572.11571.82973.69513.2103
H82.73651.11152.11572.11573.69511.82973.2103

picture of 1,3-dioxetane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O3 C2 86.740 C1 O4 C2 86.740
O3 C1 O4 93.260 O3 C1 H5 112.955
O3 C1 H7 112.955 O3 C2 O4 93.260
O3 C2 H6 112.955 O3 C2 H8 112.955
O4 C1 H5 112.955 O4 C1 H7 112.955
O4 C2 H6 112.955 O4 C2 H8 112.955
H5 C1 H7 110.788 H6 C2 H8 110.788
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at LSDA/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.026      
2 C 0.026      
3 O -0.363      
4 O -0.363      
5 H 0.169      
6 H 0.169      
7 H 0.169      
8 H 0.169      


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 0.000 0.000
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -19.210 0.000 0.000
y 0.000 -29.585 0.000
z 0.000 0.000 -23.284
Traceless
 xyz
x 7.225 0.000 0.000
y 0.000 -8.338 0.000
z 0.000 0.000 1.113
Polar
3z2-r22.227
x2-y210.375
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.632 0.000 0.000
y 0.000 3.843 0.000
z 0.000 0.000 4.370


<r2> (average value of r2) Å2
<r2> 57.048
(<r2>)1/2 7.553