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: PBEPBEultrafine/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 PBEPBEultrafine/6-31G(2df,p)
 hartrees
Energy at 0K-302.780249
Energy at 298.15K 
HF Energy-302.780249
Nuclear repulsion energy158.312518
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 PBEPBEultrafine/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 2914 2884 92.96 105.93 0.29 0.45
2 A1 1875 1855 23.88 28.62 0.17 0.30
3 A1 1396 1382 0.46 3.68 0.33 0.50
4 A1 1103 1092 90.94 3.34 0.16 0.27
5 A1 521 516 0.30 10.67 0.30 0.46
6 A1 270 267 11.24 0.56 0.32 0.49
7 A2 986 976 0.00 0.71 0.75 0.86
8 A2 189 187 0.00 0.09 0.75 0.86
9 B1 992 982 0.03 3.62 0.75 0.86
10 B1 130 129 4.39 0.09 0.75 0.86
11 B2 2895 2865 0.42 1.50 0.75 0.86
12 B2 1795 1777 545.30 2.29 0.75 0.86
13 B2 1340 1326 4.40 7.74 0.75 0.86
14 B2 1018 1007 535.39 2.78 0.75 0.86
15 B2 686 678 33.08 0.08 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 9054.4 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 8961.2 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 PBEPBEultrafine/6-31G(2df,p)
ABC
1.59166 0.08531 0.08097

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 0.402
C2 0.000 1.183 -0.323
C3 0.000 -1.183 -0.323
O4 0.000 2.250 0.219
O5 0.000 -2.250 0.219
H6 0.000 1.014 -1.424
H7 0.000 -1.014 -1.424

Atom - Atom Distances (Å)
  O1 C2 C3 O4 O5 H6 H7
O11.38701.38702.25742.25742.08782.0878
C21.38702.36581.19683.47541.11402.4571
C31.38702.36583.47541.19682.45711.1140
O42.25741.19683.47544.50012.05613.6539
O52.25743.47541.19684.50013.65392.0561
H62.08781.11402.45712.05613.65392.0274
H72.08782.45711.11403.65392.05612.0274

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 121.609 O1 C2 H6 112.737
O1 C3 O5 121.609 C2 O1 C3 117.050
O4 C2 H6 125.654
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.118      
2 C 0.158      
3 C 0.158      
4 O -0.210      
5 O -0.210      
6 H 0.112      
7 H 0.112      


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 -2.792 2.792
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.004 0.000 0.000
y 0.000 -37.019 0.000
z 0.000 0.000 -25.639
Traceless
 xyz
x 5.325 0.000 0.000
y 0.000 -11.197 0.000
z 0.000 0.000 5.872
Polar
3z2-r211.744
x2-y211.015
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.676 0.000 0.000
y 0.000 7.469 0.000
z 0.000 0.000 4.252


<r2> (average value of r2) Å2
<r2> 125.669
(<r2>)1/2 11.210