return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: CISD/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CISD/Def2TZVPP
 hartrees
Energy at 0K-302.454551
Energy at 298.15K 
HF Energy-301.615134
Nuclear repulsion energy161.765918
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 CISD/Def2TZVPP
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 3187 3187 66.41      
2 A1 2030 2030 38.96      
3 A1 1538 1538 0.48      
4 A1 1241 1241 123.90      
5 A1 579 579 1.11      
6 A1 297 297 16.37      
7 A2 1105 1105 0.00      
8 A2 182 182 0.00      
9 B1 1117 1117 1.09      
10 B1 131 131 5.49      
11 B2 3162 3162 1.68      
12 B2 1946 1946 801.23      
13 B2 1477 1477 13.13      
14 B2 1205 1205 694.37      
15 B2 754 754 49.25      

Unscaled Zero Point Vibrational Energy (zpe) 9975.6 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 9975.6 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 CISD/Def2TZVPP
ABC
1.67533 0.08881 0.08434

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.377
C2 0.000 1.162 -0.315
C3 0.000 -1.162 -0.315
O4 0.000 2.203 0.222
O5 0.000 -2.203 0.222
H6 0.000 1.025 -1.395
H7 0.000 -1.025 -1.395

Atom - Atom Distances (Å)
  O1 C2 C3 O4 O5 H6 H7
O11.35251.35252.20882.20882.04722.0472
C21.35252.32331.17233.40771.08782.4389
C31.35252.32333.40771.17232.43891.0878
O42.20881.17233.40774.40672.00053.6111
O52.20883.40771.17234.40673.61112.0005
H62.04721.08782.43892.00053.61112.0509
H72.04722.43891.08783.61112.00052.0509

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 121.892 O1 C2 H6 113.612
O1 C3 O5 121.892 C2 O1 C3 118.391
O4 C2 H6 124.496
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability