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 C4H4O (Furan)

using model chemistry: HSEh1PBE/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HSEh1PBE/6-311G*
 hartrees
Energy at 0K-229.825497
Energy at 298.15K 
HF Energy-229.825497
Nuclear repulsion energy161.553251
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 HSEh1PBE/6-311G*
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 3306 3173 0.02 194.18 0.15 0.25
2 A1 3276 3143 1.71 33.10 0.27 0.42
3 A1 1539 1477 20.84 35.61 0.19 0.32
4 A1 1438 1380 2.59 14.10 0.41 0.58
5 A1 1180 1132 0.77 26.42 0.21 0.35
6 A1 1113 1068 16.56 5.78 0.23 0.37
7 A1 1028 987 43.83 0.79 0.22 0.36
8 A1 894 858 14.07 0.64 0.71 0.83
9 A2 874 839 0.00 0.93 0.75 0.86
10 A2 732 703 0.00 0.21 0.75 0.86
11 A2 619 594 0.00 0.01 0.75 0.86
12 B1 841 807 0.01 0.28 0.75 0.86
13 B1 759 728 113.15 0.82 0.75 0.86
14 B1 632 607 26.46 1.89 0.75 0.86
15 B2 3300 3166 3.16 15.04 0.75 0.86
16 B2 3264 3132 2.97 98.41 0.75 0.86
17 B2 1619 1554 0.80 0.51 0.75 0.86
18 B2 1293 1241 0.23 0.69 0.75 0.86
19 B2 1233 1184 19.21 0.41 0.75 0.86
20 B2 1073 1030 3.99 4.59 0.75 0.86
21 B2 898 862 0.34 3.76 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15456.5 cm-1
Scaled (by 0.9596) Zero Point Vibrational Energy (zpe) 14832.0 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 HSEh1PBE/6-311G*
ABC
0.31929 0.31148 0.15767

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.153
C2 0.000 1.087 0.347
C3 0.000 -1.087 0.347
C4 0.000 0.715 -0.956
C5 0.000 -0.715 -0.956
H6 0.000 2.040 0.850
H7 0.000 -2.040 0.850
H8 0.000 1.373 -1.812
H9 0.000 -1.373 -1.812

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.35291.35292.22692.22692.06282.06283.26763.2676
C21.35292.17361.35542.22351.07823.16742.17833.2730
C31.35292.17362.22351.35543.16741.07823.27302.1783
C42.22691.35542.22351.42952.24063.29451.07982.2562
C52.22692.22351.35541.42953.29452.24062.25621.0798
H62.06281.07823.16742.24063.29454.08092.74494.3288
H72.06283.16741.07823.29452.24064.08094.32882.7449
H83.26762.17833.27301.07982.25622.74494.32882.7454
H93.26763.27302.17832.25621.07984.32882.74492.7454

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.623 O1 C2 H6 115.639
O1 C3 C5 110.623 O1 C3 H7 115.639
C2 O1 C3 106.890 C2 C4 C5 105.932
C2 C4 H8 126.524 C3 C5 C4 105.932
C3 C5 H9 126.524 C4 C2 H6 133.739
C4 C5 H9 127.544 C5 C3 H7 133.739
C5 C4 H8 127.544
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.219      
2 C -0.043      
3 C -0.043      
4 C -0.286      
5 C -0.286      
6 H 0.226      
7 H 0.226      
8 H 0.212      
9 H 0.212      


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 -0.580 0.580
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.939 0.000 0.000
y 0.000 -23.713 0.000
z 0.000 0.000 -27.628
Traceless
 xyz
x -6.269 0.000 0.000
y 0.000 6.071 0.000
z 0.000 0.000 0.198
Polar
3z2-r20.396
x2-y2-8.226
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.246 0.000 0.000
y 0.000 7.395 0.000
z 0.000 0.000 6.910


<r2> (average value of r2) Å2
<r2> 80.803
(<r2>)1/2 8.989