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All results from a given calculation for C2H4O (Ethylene oxide)

using model chemistry: QCISD(T)/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD(T)/Def2TZVPP
 hartrees
Energy at 0K-153.549304
Energy at 298.15K 
HF Energy-152.931553
Nuclear repulsion energy75.146878
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 QCISD(T)/Def2TZVPP
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 3121 3121        
2 A1 1550 1550        
3 A1 1298 1298        
4 A1 1158 1158        
5 A1 896 896        
6 A2 3200 3200        
7 A2 1178 1178        
8 A2 1052 1052        
9 B1 3216 3216        
10 B1 1176 1176        
11 B1 818 818        
12 B2 3112 3112        
13 B2 1514 1514        
14 B2 1162 1162        
15 B2 846 846        

Unscaled Zero Point Vibrational Energy (zpe) 12647.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 12647.9 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 QCISD(T)/Def2TZVPP
ABC
0.85094 0.73958 0.47118

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.857
C2 0.000 0.734 -0.374
C3 0.000 -0.734 -0.374
H4 0.920 1.265 -0.591
H5 -0.920 1.265 -0.591
H6 -0.920 -1.265 -0.591
H7 0.920 -1.265 -0.591

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.43371.43372.13152.13152.13152.1315
C21.43371.46801.08421.08422.21122.2112
C31.43371.46802.21122.21121.08421.0842
H42.13151.08422.21121.84033.12842.5299
H52.13151.08422.21121.84032.52993.1284
H62.13152.21121.08423.12842.52991.8403
H72.13152.21121.08422.52993.12841.8403

picture of Ethylene oxide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 59.205 O1 C2 H4 114.974
O1 C2 H5 114.974 O1 C3 C2 59.205
O1 C3 H6 114.974 O1 C3 H7 114.974
C2 O1 C3 61.591 C2 C3 H6 119.322
C2 C3 H7 119.322 C3 C2 H4 119.322
C3 C2 H5 119.322 H4 C2 H5 116.145
H6 C3 H7 116.145
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability