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All results from a given calculation for C4H4O (Furan)

using model chemistry: PBEPBEultrafine/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 PBEPBEultrafine/6-31G*
 hartrees
Energy at 0K-229.743947
Energy at 298.15K 
HF Energy-229.743947
Nuclear repulsion energy159.859626
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*
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 3235 3182 0.03 204.00 0.12 0.22
2 A1 3207 3154 1.74 33.43 0.27 0.43
3 A1 1487 1463 15.95 28.89 0.25 0.39
4 A1 1398 1375 3.10 10.65 0.47 0.64
5 A1 1144 1125 0.21 25.52 0.26 0.41
6 A1 1082 1064 6.90 10.06 0.28 0.43
7 A1 999 983 37.34 1.71 0.28 0.44
8 A1 858 844 13.08 0.32 0.70 0.83
9 A2 828 814 0.00 1.16 0.75 0.86
10 A2 679 668 0.00 2.18 0.75 0.86
11 A2 595 585 0.00 0.04 0.75 0.86
12 B1 782 770 3.05 0.66 0.75 0.86
13 B1 723 711 85.05 0.74 0.75 0.86
14 B1 610 600 13.66 2.24 0.75 0.86
15 B2 3230 3176 2.33 17.00 0.75 0.86
16 B2 3196 3143 2.37 103.76 0.75 0.86
17 B2 1566 1540 0.39 0.12 0.75 0.86
18 B2 1251 1230 0.18 0.87 0.75 0.86
19 B2 1191 1172 16.44 1.23 0.75 0.86
20 B2 1041 1024 2.57 4.49 0.75 0.86
21 B2 860 846 0.17 3.41 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14980.7 cm-1
Scaled (by 0.9835) Zero Point Vibrational Energy (zpe) 14733.5 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 PBEPBEultrafine/6-31G*
ABC
0.31350 0.30423 0.15440

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/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 -0.967
C5 0.000 -0.718 -0.967
H6 0.000 2.060 0.859
H7 0.000 -2.060 0.859
H8 0.000 1.379 -1.832
H9 0.000 -1.379 -1.832

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.37091.37092.25312.25312.08322.08323.30293.3029
C21.37092.19831.37022.24411.08763.20002.19973.3021
C31.37092.19832.24411.37023.20001.08763.30212.1997
C42.25311.37022.24411.43682.26563.32461.08912.2694
C52.25312.24411.37021.43683.32462.26562.26941.0891
H62.08321.08763.20002.26563.32464.12012.77594.3672
H72.08323.20001.08763.32462.26564.12014.36722.7759
H83.30292.19973.30211.08912.26942.77594.36722.7589
H93.30293.30212.19972.26941.08914.36722.77592.7589

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.567 O1 C2 H6 115.371
O1 C3 C5 110.567 O1 C3 H7 115.371
C2 O1 C3 106.599 C2 C4 C5 106.133
C2 C4 H8 126.498 C3 C5 C4 106.133
C3 C5 H9 126.498 C4 C2 H6 134.062
C4 C5 H9 127.368 C5 C3 H7 134.062
C5 C4 H8 127.368
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.353      
2 C 0.054      
3 C 0.054      
4 C -0.185      
5 C -0.185      
6 H 0.161      
7 H 0.161      
8 H 0.147      
9 H 0.147      


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 -0.544 0.544
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.148 0.000 0.000
y 0.000 -23.696 0.000
z 0.000 0.000 -27.392
Traceless
 xyz
x -5.604 0.000 0.000
y 0.000 5.574 0.000
z 0.000 0.000 0.030
Polar
3z2-r20.060
x2-y2-7.452
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.599 0.000 0.000
y 0.000 7.459 0.000
z 0.000 0.000 6.825


<r2> (average value of r2) Å2
<r2> 81.904
(<r2>)1/2 9.050