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

using model chemistry: QCISD/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-153.368114
Energy at 298.15K 
HF Energy-152.876071
Nuclear repulsion energy74.854207
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/cc-pVDZ
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 3131 3004 9.98      
2 A1 1558 1495 3.99      
3 A1 1316 1263 10.15      
4 A1 1170 1123 0.61      
5 A1 911 874 57.59      
6 A2 3209 3079 0.00      
7 A2 1176 1128 0.00      
8 A2 1048 1005 0.00      
9 B1 3225 3094 57.24      
10 B1 1174 1127 4.60      
11 B1 819 786 0.04      
12 B2 3120 2993 36.59      
13 B2 1507 1446 0.75      
14 B2 1154 1107 0.84      
15 B2 870 834 8.72      

Unscaled Zero Point Vibrational Energy (zpe) 12694.1 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 12178.7 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/cc-pVDZ
ABC
0.85211 0.72780 0.46849

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.855
C2 0.000 0.738 -0.371
C3 0.000 -0.738 -0.371
H4 0.929 1.279 -0.597
H5 -0.929 1.279 -0.597
H6 -0.929 -1.279 -0.597
H7 0.929 -1.279 -0.597

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7
O11.43101.43102.14662.14662.14662.1466
C21.43101.47691.09861.09862.23262.2326
C31.43101.47692.23262.23261.09861.0986
H42.14661.09862.23261.85863.16162.5577
H52.14661.09862.23261.85862.55773.1616
H62.14662.23261.09863.16162.55771.8586
H72.14662.23261.09862.55773.16161.8586

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 58.932 O1 C2 H4 115.497
O1 C2 H5 115.497 O1 C3 C2 58.932
O1 C3 H6 115.497 O1 C3 H7 115.497
C2 O1 C3 62.135 C2 C3 H6 119.464
C2 C3 H7 119.464 C3 C2 H4 119.464
C3 C2 H5 119.464 H4 C2 H5 115.536
H6 C3 H7 115.536
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability