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All results from a given calculation for C4H4O (Furan)

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-229.750415
Energy at 298.15K 
HF Energy-229.750415
Nuclear repulsion energy159.882471
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 3234 3190 0.01 211.68 0.12 0.21
2 A1 3206 3162 0.99 29.36 0.32 0.48
3 A1 1486 1465 16.15 29.97 0.25 0.40
4 A1 1394 1375 2.84 10.42 0.48 0.65
5 A1 1141 1125 0.25 26.25 0.25 0.40
6 A1 1081 1066 7.03 10.10 0.29 0.45
7 A1 997 984 37.23 1.77 0.30 0.47
8 A1 858 846 12.92 0.29 0.68 0.81
9 A2 834 823 0.00 1.14 0.75 0.86
10 A2 684 675 0.00 2.44 0.75 0.86
11 A2 595 587 0.00 0.05 0.75 0.86
12 B1 789 779 1.59 0.66 0.75 0.86
13 B1 726 716 83.39 0.82 0.75 0.86
14 B1 610 602 13.69 2.24 0.75 0.86
15 B2 3227 3183 1.42 14.58 0.75 0.86
16 B2 3196 3152 2.14 106.46 0.75 0.86
17 B2 1564 1543 0.34 0.11 0.75 0.86
18 B2 1247 1230 0.18 0.94 0.75 0.86
19 B2 1190 1173 15.72 1.21 0.75 0.86
20 B2 1039 1024 2.59 4.73 0.75 0.86
21 B2 859 847 0.18 3.40 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14977.8 cm-1
Scaled (by 0.9863) Zero Point Vibrational Energy (zpe) 14772.6 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 PBEPBE/6-31G**
ABC
0.31350 0.30438 0.15444

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 1.169
C2 0.000 1.099 0.350
C3 0.000 -1.099 0.350
C4 0.000 0.718 -0.966
C5 0.000 -0.718 -0.966
H6 0.000 2.061 0.856
H7 0.000 -2.061 0.856
H8 0.000 1.379 -1.831
H9 0.000 -1.379 -1.831

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.37091.37092.25292.25292.08442.08443.30163.3016
C21.37092.19841.37012.24391.08683.20032.19843.3011
C31.37092.19842.24391.37013.20031.08683.30112.1984
C42.25291.37012.24391.43652.26363.32331.08822.2686
C52.25292.24391.37011.43653.32332.26362.26861.0882
H62.08441.08683.20032.26363.32334.12152.77204.3649
H72.08443.20031.08683.32332.26364.12154.36492.7720
H83.30162.19843.30111.08822.26862.77204.36492.7584
H93.30163.30112.19842.26861.08824.36492.77202.7584

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.555 O1 C2 H6 115.531
O1 C3 C5 110.555 O1 C3 H7 115.531
C2 O1 C3 106.604 C2 C4 C5 106.143
C2 C4 H8 126.453 C3 C5 C4 106.143
C3 C5 H9 126.453 C4 C2 H6 133.914
C4 C5 H9 127.404 C5 C3 H7 133.914
C5 C4 H8 127.404
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 -0.365      
2 C 0.100      
3 C 0.100      
4 C -0.143      
5 C -0.143      
6 H 0.120      
7 H 0.120      
8 H 0.105      
9 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 -0.542 0.542
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.092 0.000 0.000
y 0.000 -23.732 0.000
z 0.000 0.000 -27.447
Traceless
 xyz
x -5.503 0.000 0.000
y 0.000 5.538 0.000
z 0.000 0.000 -0.035
Polar
3z2-r2-0.071
x2-y2-7.361
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.639 0.000 0.000
y 0.000 7.527 0.000
z 0.000 0.000 6.874


<r2> (average value of r2) Å2
<r2> 81.891
(<r2>)1/2 9.049