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: PBE1PBE/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 PBE1PBE/3-21G
 hartrees
Energy at 0K-301.059197
Energy at 298.15K 
HF Energy-301.059197
Nuclear repulsion energy157.390019
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 PBE1PBE/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 3034 2913 98.49 99.52 0.29 0.45
2 A1 1897 1822 19.50 18.28 0.17 0.29
3 A1 1493 1434 0.56 2.75 0.43 0.60
4 A1 1093 1050 105.95 7.56 0.19 0.33
5 A1 540 518 1.14 10.41 0.39 0.56
6 A1 266 255 10.78 0.66 0.52 0.69
7 A2 1074 1031 0.00 2.25 0.75 0.86
8 A2 186 178 0.00 0.49 0.75 0.86
9 B1 1075 1033 0.04 3.08 0.75 0.86
10 B1 130 125 2.78 0.12 0.75 0.86
11 B2 3016 2896 1.58 3.28 0.75 0.86
12 B2 1802 1730 528.14 2.07 0.75 0.86
13 B2 1440 1383 1.85 14.46 0.75 0.86
14 B2 1083 1040 549.44 1.57 0.75 0.86
15 B2 703 675 37.92 0.00 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9415.0 cm-1
Scaled (by 0.9604) Zero Point Vibrational Energy (zpe) 9042.2 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 PBE1PBE/3-21G
ABC
1.60499 0.08389 0.07972

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.401
C2 0.000 1.193 -0.323
C3 0.000 -1.193 -0.323
O4 0.000 2.269 0.219
O5 0.000 -2.269 0.219
H6 0.000 1.020 -1.409
H7 0.000 -1.020 -1.409

Atom - Atom Distances (Å)
  O1 C2 C3 O4 O5 H6 H7
O11.39551.39552.27632.27632.07732.0773
C21.39552.38601.20483.50421.09962.4647
C31.39552.38603.50421.20482.46471.0996
O42.27631.20483.50424.53802.05203.6694
O52.27633.50421.20484.53803.66942.0520
H62.07731.09962.46472.05203.66942.0392
H72.07732.46471.09963.66942.05202.0392

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 122.010 O1 C2 H6 112.179
O1 C3 O5 122.010 C2 O1 C3 117.494
O4 C2 H6 125.810
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.517      
2 C 0.468      
3 C 0.468      
4 O -0.414      
5 O -0.414      
6 H 0.204      
7 H 0.204      


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 -3.442 3.442
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.169 0.000 0.000
y 0.000 -38.189 0.000
z 0.000 0.000 -26.031
Traceless
 xyz
x 5.941 0.000 0.000
y 0.000 -12.089 0.000
z 0.000 0.000 6.148
Polar
3z2-r212.296
x2-y212.020
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.570 0.000 0.000
y 0.000 6.590 0.000
z 0.000 0.000 3.233


<r2> (average value of r2) Å2
<r2> 127.626
(<r2>)1/2 11.297