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

using model chemistry: QCISD/3-21G

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/3-21G
 hartrees
Energy at 0K-300.342634
Energy at 298.15K 
HF Energy-299.775312
Nuclear repulsion energy155.609255
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/3-21G
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 3009 2916 100.94      
2 A1 1815 1759 15.77      
3 A1 1509 1462 0.04      
4 A1 1066 1033 97.26      
5 A1 528 511 1.18      
6 A1 264 256 9.33      
7 A2 1053 1021 0.00      
8 A2 162 157 0.00      
9 B1 1049 1017 1.07      
10 B1 113 109 1.83      
11 B2 2988 2896 4.20      
12 B2 1726 1673 456.52      
13 B2 1463 1418 6.26      
14 B2 1055 1022 562.52      
15 B2 697 676 38.89      

Unscaled Zero Point Vibrational Energy (zpe) 9248.0 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 8963.2 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/3-21G
ABC
1.57293 0.08191 0.07786

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.407
C2 0.000 1.208 -0.328
C3 0.000 -1.208 -0.328
O4 0.000 2.296 0.220
O5 0.000 -2.296 0.220
H6 0.000 1.042 -1.417
H7 0.000 -1.042 -1.417

Atom - Atom Distances (Å)
  O1 C2 C3 O4 O5 H6 H7
O11.41431.41432.30332.30332.10052.1005
C21.41432.41611.21783.54631.10112.4994
C31.41432.41613.54631.21782.49941.1011
O42.30331.21783.54634.59142.06133.7171
O52.30333.54631.21784.59143.71712.0613
H62.10051.10112.49942.06133.71712.0839
H72.10052.49941.10113.71712.06132.0839

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 121.942 O1 C2 H6 112.655
O1 C3 O5 121.942 C2 O1 C3 117.338
O4 C2 H6 125.404
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability