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: mPW1PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/3-21G*
 hartrees
Energy at 0K-301.304157
Energy at 298.15K 
HF Energy-301.304157
Nuclear repulsion energy157.421319
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 mPW1PW91/3-21G*
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 3042 2889 99.69 100.69 0.29 0.45
2 A1 1896 1800 19.77 18.30 0.17 0.29
3 A1 1496 1421 0.51 2.74 0.42 0.59
4 A1 1092 1037 106.68 7.51 0.20 0.33
5 A1 539 512 1.11 10.37 0.39 0.56
6 A1 265 252 10.90 0.65 0.52 0.69
7 A2 1075 1021 0.00 2.27 0.75 0.86
8 A2 184 174 0.00 0.49 0.75 0.86
9 B1 1077 1022 0.03 3.02 0.75 0.86
10 B1 130 123 2.78 0.12 0.75 0.86
11 B2 3025 2872 1.72 3.44 0.75 0.86
12 B2 1801 1710 529.63 2.08 0.75 0.86
13 B2 1444 1371 1.97 14.40 0.75 0.86
14 B2 1080 1026 552.10 1.57 0.75 0.86
15 B2 704 668 38.68 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9423.6 cm-1
Scaled (by 0.9496) Zero Point Vibrational Energy (zpe) 8948.6 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 mPW1PW91/3-21G*
ABC
1.60689 0.08389 0.07973

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.399
C2 0.000 1.194 -0.324
C3 0.000 -1.194 -0.324
O4 0.000 2.269 0.219
O5 0.000 -2.269 0.219
H6 0.000 1.022 -1.408
H7 0.000 -1.022 -1.408

Atom - Atom Distances (Å)
  O1 C2 C3 O4 O5 H6 H7
O11.39561.39562.27582.27582.07642.0764
C21.39562.38731.20423.50461.09792.4668
C31.39562.38733.50461.20422.46681.0979
O42.27581.20423.50464.53742.04973.6710
O52.27583.50461.20424.53743.67102.0497
H62.07641.09792.46682.04973.67102.0441
H72.07642.46681.09793.67102.04972.0441

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 122.011 O1 C2 H6 112.214
O1 C3 O5 122.011 C2 O1 C3 117.587
O4 C2 H6 125.775
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.519      
2 C 0.470      
3 C 0.470      
4 O -0.415      
5 O -0.415      
6 H 0.205      
7 H 0.205      


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 -3.474 3.474
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.115 0.000 0.000
y 0.000 -38.202 0.000
z 0.000 0.000 -25.962
Traceless
 xyz
x 5.967 0.000 0.000
y 0.000 -12.164 0.000
z 0.000 0.000 6.197
Polar
3z2-r212.394
x2-y212.088
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.568 0.000 0.000
y 0.000 6.575 0.000
z 0.000 0.000 3.223


<r2> (average value of r2) Å2
<r2> 127.598
(<r2>)1/2 11.296