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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 2892 100.94      
2 A1 1815 1745 15.77      
3 A1 1509 1450 0.04      
4 A1 1066 1025 97.26      
5 A1 528 507 1.18      
6 A1 264 254 9.33      
7 A2 1053 1012 0.00      
8 A2 162 156 0.00      
9 B1 1049 1009 1.07      
10 B1 113 108 1.83      
11 B2 2988 2872 4.20      
12 B2 1726 1659 456.52      
13 B2 1463 1406 6.26      
14 B2 1055 1014 562.52      
15 B2 697 670 38.89      

Unscaled Zero Point Vibrational Energy (zpe) 9248.0 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 8888.2 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