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: PBEPBE/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 PBEPBE/6-31G**
 hartrees
Energy at 0K-302.758992
Energy at 298.15K 
HF Energy-302.758992
Nuclear repulsion energy157.723276
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 PBEPBE/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 2930 2890 103.08 114.94 0.29 0.44
2 A1 1876 1850 23.85 27.57 0.19 0.32
3 A1 1401 1382 0.34 3.15 0.32 0.49
4 A1 1100 1085 101.43 5.07 0.19 0.32
5 A1 518 511 0.29 11.28 0.36 0.53
6 A1 267 264 11.65 0.73 0.36 0.53
7 A2 981 967 0.00 1.20 0.75 0.86
8 A2 181 179 0.00 0.24 0.75 0.86
9 B1 988 974 0.04 4.23 0.75 0.86
10 B1 131 129 4.00 0.09 0.75 0.86
11 B2 2912 2872 0.07 2.40 0.75 0.86
12 B2 1799 1774 557.41 2.78 0.75 0.86
13 B2 1351 1332 5.19 9.55 0.75 0.86
14 B2 1021 1007 551.62 3.04 0.75 0.86
15 B2 681 672 33.45 0.03 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9067.7 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 8943.5 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 PBEPBE/6-31G**
ABC
1.58099 0.08464 0.08034

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.398
C2 0.000 1.188 -0.325
C3 0.000 -1.188 -0.325
O4 0.000 2.258 0.223
O5 0.000 -2.258 0.223
H6 0.000 1.027 -1.427
H7 0.000 -1.027 -1.427

Atom - Atom Distances (Å)
  O1 C2 C3 O4 O5 H6 H7
O11.39111.39112.26522.26522.09472.0947
C21.39112.37631.20243.48991.11372.4743
C31.39112.37633.48991.20242.47431.1137
O42.26521.20243.48994.51692.05873.6767
O52.26523.48991.20244.51693.67672.0587
H62.09471.11372.47432.05873.67672.0544
H72.09472.47431.11373.67672.05872.0544

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 121.546 O1 C2 H6 113.030
O1 C3 O5 121.546 C2 O1 C3 117.321
O4 C2 H6 125.424
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.335      
2 C 0.406      
3 C 0.406      
4 O -0.343      
5 O -0.343      
6 H 0.105      
7 H 0.105      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -2.942 2.942
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.094 0.000 0.000
y 0.000 -37.257 0.000
z 0.000 0.000 -25.766
Traceless
 xyz
x 5.418 0.000 0.000
y 0.000 -11.327 0.000
z 0.000 0.000 5.910
Polar
3z2-r211.819
x2-y211.163
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.239 0.000 0.000
y 0.000 7.415 0.000
z 0.000 0.000 3.964


<r2> (average value of r2) Å2
<r2> 126.620
(<r2>)1/2 11.253