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: PBEPBEultrafine/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 PBEPBEultrafine/6-311G*
 hartrees
Energy at 0K-229.796243
Energy at 298.15K 
HF Energy-229.796243
Nuclear repulsion energy160.117458
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/6-311G*
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 3214 3181 0.01 210.89 0.15 0.25
2 A1 3184 3151 2.79 36.40 0.28 0.44
3 A1 1475 1460 16.33 33.09 0.20 0.33
4 A1 1384 1370 2.71 10.87 0.45 0.62
5 A1 1138 1126 0.16 26.07 0.21 0.35
6 A1 1073 1061 8.06 7.79 0.24 0.39
7 A1 991 981 43.52 1.57 0.20 0.33
8 A1 861 852 13.35 0.46 0.74 0.85
9 A2 820 811 0.00 0.87 0.75 0.86
10 A2 678 671 0.00 0.35 0.75 0.86
11 A2 596 590 0.00 0.01 0.75 0.86
12 B1 780 772 1.48 0.00 0.75 0.86
13 B1 717 709 110.78 0.82 0.75 0.86
14 B1 610 604 20.12 1.81 0.75 0.86
15 B2 3208 3174 3.72 17.33 0.75 0.86
16 B2 3173 3140 3.12 107.71 0.75 0.86
17 B2 1552 1536 0.47 0.29 0.75 0.86
18 B2 1243 1230 0.06 0.81 0.75 0.86
19 B2 1170 1158 18.20 0.69 0.75 0.86
20 B2 1029 1018 3.51 4.34 0.75 0.86
21 B2 866 857 0.19 3.26 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14881.1 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 14726.3 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/6-311G*
ABC
0.31439 0.30535 0.15490

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.167
C2 0.000 1.097 0.348
C3 0.000 -1.097 0.348
C4 0.000 0.718 -0.965
C5 0.000 -0.718 -0.965
H6 0.000 2.056 0.858
H7 0.000 -2.056 0.858
H8 0.000 1.378 -1.829
H9 0.000 -1.378 -1.829

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.36911.36912.24942.24942.07952.07953.29773.2977
C21.36912.19491.36702.24041.08603.19472.19543.2970
C31.36912.19492.24041.36703.19471.08603.29702.1954
C42.24941.36702.24041.43552.26163.31941.08772.2672
C52.24942.24041.36701.43553.31942.26162.26721.0877
H62.07951.08603.19472.26163.31944.11282.77124.3608
H72.07953.19471.08603.31942.26164.11284.36082.7712
H83.29772.19543.29701.08772.26722.77124.36082.7566
H93.29773.29702.19542.26721.08774.36082.77122.7566

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.593 O1 C2 H6 115.294
O1 C3 C5 110.593 O1 C3 H7 115.294
C2 O1 C3 106.562 C2 C4 C5 106.126
C2 C4 H8 126.479 C3 C5 C4 106.126
C3 C5 H9 126.479 C4 C2 H6 134.113
C4 C5 H9 127.394 C5 C3 H7 134.113
C5 C4 H8 127.394
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.192      
2 C -0.049      
3 C -0.049      
4 C -0.260      
5 C -0.260      
6 H 0.210      
7 H 0.210      
8 H 0.195      
9 H 0.195      


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 -0.543 0.543
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.000 0.000 0.000
y 0.000 -23.995 0.000
z 0.000 0.000 -27.753
Traceless
 xyz
x -6.125 0.000 0.000
y 0.000 5.882 0.000
z 0.000 0.000 0.244
Polar
3z2-r20.488
x2-y2-8.005
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.290 0.000 0.000
y 0.000 7.757 0.000
z 0.000 0.000 7.118


<r2> (average value of r2) Å2
<r2> 82.010
(<r2>)1/2 9.056