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

using model chemistry: G3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at G3
 hartrees
Energy at 0K-228.851925
Energy at 298.15K-228.857977
Nuclear repulsion energy132.764598
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/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 3244 3057 0.00      
2 Ag 1748 1647 0.00      
3 Ag 1240 1169 0.00      
4 Ag 988 930 0.00      
5 Au 1246 1174 0.00      
6 B1g 1483 1397 0.00      
7 B1g 1117 1053 0.00      
8 B1u 3293 3102 174.22      
9 B1u 1303 1227 35.29      
10 B1u 213 201 20.61      
11 B2g 3286 3096 0.00      
12 B2g 1236 1165 0.00      
13 B2u 1609 1516 51.00      
14 B2u 1082 1019 137.76      
15 B3g 1217 1147 0.00      
16 B3u 3228 3042 203.35      
17 B3u 1709 1611 33.78      
18 B3u 1219 1149 319.05      

Unscaled Zero Point Vibrational Energy (zpe) 15230.9 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 14350.5 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 MP2=FULL/6-31G*
ABC
0.45928 0.44261 0.24715

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.980 0.000 0.000
C2 0.980 0.000 0.000
O3 0.000 1.043 0.000
O4 0.000 -1.043 0.000
H5 -1.602 0.000 0.904
H6 1.602 0.000 0.904
H7 -1.602 0.000 -0.904
H8 1.602 0.000 -0.904

Atom - Atom Distances (Å)
  C1 C2 O3 O4 H5 H6 H7 H8
C11.96081.43141.43141.09672.73581.09672.7358
C21.96081.43141.43142.73581.09672.73581.0967
O31.43141.43142.08582.11432.11432.11432.1143
O41.43141.43142.08582.11432.11432.11432.1143
H51.09672.73582.11432.11433.20371.80743.6783
H62.73581.09672.11432.11433.20373.67831.8074
H71.09672.73582.11432.11431.80743.67833.2037
H82.73581.09672.11432.11433.67831.80743.2037

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 87.466 C1 O4 C2 87.466
O3 C1 O4 92.534 O3 C1 H5 113.106
O3 C1 H7 113.106 O3 C2 O4 92.534
O3 C2 H6 113.106 O3 C2 H8 113.106
O4 C1 H5 113.106 O4 C1 H7 113.106
O4 C2 H6 113.106 O4 C2 H8 113.106
H5 C1 H7 110.823 H6 C2 H8 110.823
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability