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: QCISD/6-31G(2df,p)

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/6-31G(2df,p)
 hartrees
Energy at 0K-302.471590
Energy at 298.15K 
HF Energy-301.510999
Nuclear repulsion energy159.929733
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/6-31G(2df,p)
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 3084 2922 67.06      
2 A1 1940 1838 26.82      
3 A1 1493 1414 0.00      
4 A1 1180 1118 102.31      
5 A1 552 523 0.82      
6 A1 289 274 13.26      
7 A2 1053 998 0.00      
8 A2 175 165 0.00      
9 B1 1061 1005 1.00      
10 B1 126 119 4.48      
11 B2 3060 2899 0.09      
12 B2 1862 1764 608.59      
13 B2 1427 1352 12.61      
14 B2 1135 1075 597.47      
15 B2 717 679 38.48      

Unscaled Zero Point Vibrational Energy (zpe) 9576.4 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 9072.7 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/6-31G(2df,p)
ABC
1.62948 0.08702 0.08261

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.393
C2 0.000 1.169 -0.319
C3 0.000 -1.169 -0.319
O4 0.000 2.228 0.219
O5 0.000 -2.228 0.219
H6 0.000 1.018 -1.408
H7 0.000 -1.018 -1.408

Atom - Atom Distances (Å)
  O1 C2 C3 O4 O5 H6 H7
O11.36941.36942.23492.23492.06962.0696
C21.36942.33891.18753.43981.09952.4439
C31.36942.33893.43981.18752.44391.0995
O42.23491.18753.43984.45612.02763.6314
O52.23493.43981.18754.45613.63142.0276
H62.06961.09952.44392.02763.63142.0368
H72.06962.44391.09953.63142.02762.0368

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 121.700 O1 C2 H6 113.460
O1 C3 O5 121.700 C2 O1 C3 117.291
O4 C2 H6 124.840
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability