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

using model chemistry: QCISD(T)/6-311+G(3df,2p)

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)/6-311+G(3df,2p)
 hartrees
Energy at 0K-153.541543
Energy at 298.15K 
HF Energy-152.924198
Nuclear repulsion energy75.200335
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)/6-311+G(3df,2p)
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 3112 2968        
2 A1 1545 1474        
3 A1 1300 1240        
4 A1 1156 1103        
5 A1 898 856        
6 A2 3194 3046        
7 A2 1175 1121        
8 A2 1054 1005        
9 B1 3208 3060        
10 B1 1175 1120        
11 B1 815 778        
12 B2 3104 2960        
13 B2 1508 1438        
14 B2 1166 1112        
15 B2 848 809        

Unscaled Zero Point Vibrational Energy (zpe) 12629.3 cm-1
Scaled (by 0.9537) Zero Point Vibrational Energy (zpe) 12044.5 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 QCISD(T)/6-311+G(3df,2p)
ABC
0.85403 0.73925 0.47210

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-311+G(3df,2p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.855
C2 0.000 0.734 -0.374
C3 0.000 -0.734 -0.374
H4 0.921 1.267 -0.588
H5 -0.921 1.267 -0.588
H6 -0.921 -1.267 -0.588
H7 0.921 -1.267 -0.588

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.43131.43132.12992.12992.12992.1299
C21.43131.46711.08551.08552.21282.2128
C31.43131.46712.21282.21281.08551.0855
H42.12991.08552.21281.84143.13272.5343
H52.12991.08552.21281.84142.53433.1327
H62.12992.21281.08553.13272.53431.8414
H72.12992.21281.08552.53433.13271.8414

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 59.169 O1 C2 H4 114.923
O1 C2 H5 114.923 O1 C3 C2 59.169
O1 C3 H6 114.923 O1 C3 H7 114.923
C2 O1 C3 61.662 C2 C3 H6 119.444
C2 C3 H7 119.444 C3 C2 H4 119.444
C3 C2 H5 119.444 H4 C2 H5 116.027
H6 C3 H7 116.027
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability