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/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-229.762078
Energy at 298.15K 
HF Energy-229.762078
Nuclear repulsion energy159.641529
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/cc-pVDZ
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 3224 3205 0.01 235.43 0.12 0.22
2 A1 3197 3178 0.45 28.44 0.35 0.52
3 A1 1477 1469 16.87 34.35 0.21 0.35
4 A1 1382 1374 1.40 8.62 0.53 0.69
5 A1 1132 1125 0.88 27.80 0.20 0.33
6 A1 1072 1066 7.62 8.80 0.43 0.60
7 A1 981 975 39.98 1.91 0.38 0.55
8 A1 853 848 10.93 0.09 0.68 0.81
9 A2 844 839 0.00 0.92 0.75 0.86
10 A2 692 688 0.00 2.09 0.75 0.86
11 A2 597 593 0.00 0.02 0.75 0.86
12 B1 799 794 0.14 0.22 0.75 0.86
13 B1 725 721 84.21 0.95 0.75 0.86
14 B1 610 606 14.38 2.15 0.75 0.86
15 B2 3217 3198 0.57 13.90 0.75 0.86
16 B2 3185 3167 2.03 116.84 0.75 0.86
17 B2 1553 1544 0.19 0.23 0.75 0.86
18 B2 1223 1216 0.24 1.01 0.75 0.86
19 B2 1176 1169 15.01 0.76 0.75 0.86
20 B2 1021 1015 4.14 5.17 0.75 0.86
21 B2 857 852 0.15 3.07 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14906.5 cm-1
Scaled (by 0.9942) Zero Point Vibrational Energy (zpe) 14820.1 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/cc-pVDZ
ABC
0.31300 0.30317 0.15400

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBEultrafine/cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.170
C2 0.000 1.099 0.351
C3 0.000 -1.099 0.351
C4 0.000 0.719 -0.968
C5 0.000 -0.719 -0.968
H6 0.000 2.065 0.862
H7 0.000 -2.065 0.862
H8 0.000 1.385 -1.837
H9 0.000 -1.385 -1.837

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.37041.37042.25612.25612.08832.08833.31053.3105
C21.37042.19771.37312.24641.09323.20522.20663.3102
C31.37042.19772.24641.37313.20521.09323.31022.2066
C42.25611.37312.24641.43842.27203.33221.09432.2764
C52.25612.24641.37311.43843.33222.27202.27641.0943
H62.08831.09323.20522.27203.33224.13082.78304.3805
H72.08833.20521.09323.33222.27204.13084.38052.7830
H83.31052.20663.31021.09432.27642.78304.38052.7702
H93.31053.31022.20662.27641.09434.38052.78302.7702

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.640 O1 C2 H6 115.458
O1 C3 C5 110.640 O1 C3 H7 115.458
C2 O1 C3 106.615 C2 C4 C5 106.052
C2 C4 H8 126.464 C3 C5 C4 106.052
C3 C5 H9 126.464 C4 C2 H6 133.902
C4 C5 H9 127.484 C5 C3 H7 133.902
C5 C4 H8 127.484
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBEultrafine/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.131      
2 C 0.099      
3 C 0.099      
4 C -0.025      
5 C -0.025      
6 H 0.006      
7 H 0.006      
8 H -0.015      
9 H -0.015      


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 -0.428 0.428
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.481 0.000 0.000
y 0.000 -24.267 0.000
z 0.000 0.000 -27.634
Traceless
 xyz
x -5.531 0.000 0.000
y 0.000 5.291 0.000
z 0.000 0.000 0.240
Polar
3z2-r20.480
x2-y2-7.214
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.940 0.000 0.000
y 0.000 7.864 0.000
z 0.000 0.000 7.108


<r2> (average value of r2) Å2
<r2> 82.342
(<r2>)1/2 9.074