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All results from a given calculation for C4H4O (Furan)

using model chemistry: PBE1PBE/STO-3G

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/STO-3G
 hartrees
Energy at 0K-226.871873
Energy at 298.15K 
HF Energy-226.871873
Nuclear repulsion energy158.671474
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/STO-3G
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 3585 3163 7.34 93.89 0.12 0.21
2 A1 3547 3129 28.26 21.76 0.50 0.67
3 A1 1639 1446 4.86 15.64 0.33 0.49
4 A1 1534 1353 15.16 16.95 0.46 0.63
5 A1 1234 1089 1.14 22.45 0.30 0.46
6 A1 1157 1021 1.05 9.95 0.49 0.66
7 A1 1083 955 12.36 1.25 0.20 0.34
8 A1 917 809 6.81 0.14 0.47 0.64
9 A2 955 843 0.00 1.04 0.75 0.86
10 A2 786 694 0.00 2.27 0.75 0.86
11 A2 643 567 0.00 0.28 0.75 0.86
12 B1 918 810 0.03 0.70 0.75 0.86
13 B1 794 700 45.53 0.36 0.75 0.86
14 B1 622 548 1.82 1.46 0.75 0.86
15 B2 3569 3148 27.99 2.55 0.75 0.86
16 B2 3538 3121 13.45 64.12 0.75 0.86
17 B2 1737 1532 4.45 0.09 0.75 0.86
18 B2 1397 1232 6.01 0.17 0.75 0.86
19 B2 1294 1142 3.30 2.00 0.75 0.86
20 B2 1146 1011 1.93 5.98 0.75 0.86
21 B2 930 820 0.01 3.47 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16512.6 cm-1
Scaled (by 0.8821) Zero Point Vibrational Energy (zpe) 14565.8 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/STO-3G
ABC
0.30982 0.29901 0.15216

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.195
C2 0.000 1.107 0.342
C3 0.000 -1.107 0.342
C4 0.000 0.720 -0.970
C5 0.000 -0.720 -0.970
H6 0.000 2.085 0.830
H7 0.000 -2.085 0.830
H8 0.000 1.374 -1.842
H9 0.000 -1.374 -1.842

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.39731.39732.28112.28112.11682.11683.33293.3329
C21.39732.21381.36772.24891.09353.22932.20003.3051
C31.39732.21382.24891.36773.22931.09353.30512.2000
C42.28111.36772.24891.43962.25943.33301.09012.2681
C52.28112.24891.36771.43963.33302.25942.26811.0901
H62.11681.09353.22932.25943.33304.17052.76514.3711
H72.11683.22931.09353.33302.25944.17054.37112.7651
H83.33292.20003.30511.09012.26812.76514.37112.7480
H93.33293.30512.20002.26811.09014.37112.76512.7480

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 111.169 O1 C2 H6 115.858
O1 C3 C5 111.169 O1 C3 H7 115.858
C2 O1 C3 104.778 C2 C4 C5 106.442
C2 C4 H8 126.677 C3 C5 C4 106.442
C3 C5 H9 126.677 C4 C2 H6 132.973
C4 C5 H9 126.881 C5 C3 H7 132.973
C5 C4 H8 126.881
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.123      
2 C -0.009      
3 C -0.009      
4 C -0.121      
5 C -0.121      
6 H 0.099      
7 H 0.099      
8 H 0.092      
9 H 0.092      


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 -0.272 0.272
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.144 0.000 0.000
y 0.000 -23.257 0.000
z 0.000 0.000 -26.239
Traceless
 xyz
x -3.396 0.000 0.000
y 0.000 3.934 0.000
z 0.000 0.000 -0.539
Polar
3z2-r2-1.077
x2-y2-4.887
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.742 0.000 0.000
y 0.000 4.706 0.000
z 0.000 0.000 4.178


<r2> (average value of r2) Å2
<r2> 81.829
(<r2>)1/2 9.046