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All results from a given calculation for CHOOCHO (diformyl ether)

using model chemistry: QCISD(T)/6-31G*

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)/6-31G*
 hartrees
Energy at 0K-302.299351
Energy at 298.15K 
HF Energy-301.474994
Nuclear repulsion energy158.139637
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)/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3054 2930        
2 A1 1900 1822        
3 A1 1477 1417        
4 A1 1149 1102        
5 A1 536 514        
6 A1 281 270        
7 A2 1013 972        
8 A2 159 152        
9 B1 1019 977        
10 B1 122 117        
11 B2 3032 2909        
12 B2 1826 1751        
13 B2 1421 1363        
14 B2 1097 1053        
15 B2 697 669        

Unscaled Zero Point Vibrational Energy (zpe) 9390.4 cm-1
Scaled (by 0.9593) Zero Point Vibrational Energy (zpe) 9008.2 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)/6-31G*
ABC
1.58938 0.08509 0.08077

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.393
C2 0.000 1.184 -0.326
C3 0.000 -1.184 -0.326
O4 0.000 2.252 0.225
O5 0.000 -2.252 0.225
H6 0.000 1.041 -1.421
H7 0.000 -1.041 -1.421

Atom - Atom Distances (Å)
  O1 C2 C3 O4 O5 H6 H7
O11.38531.38532.25862.25862.09192.0919
C21.38532.36831.20193.48031.10462.4804
C31.38532.36833.48031.20192.48041.1046
O42.25861.20193.48034.50462.04373.6822
O52.25863.48031.20194.50463.68222.0437
H62.09191.10462.48042.04373.68222.0827
H72.09192.48041.10463.68222.04372.0827

picture of diformyl ether state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 O4 121.450 O1 C2 H6 113.839
O1 C3 O5 121.450 C2 O1 C3 117.470
O4 C2 H6 124.711
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability