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All results from a given calculation for C4H4O (Furan)

using model chemistry: PBEPBE/aug-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 PBEPBE/aug-cc-pVDZ
 hartrees
Energy at 0K-229.776811
Energy at 298.15K 
HF Energy-229.776811
Nuclear repulsion energy159.531124
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 PBEPBE/aug-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 3225 3205 0.03 238.62 0.11 0.20
2 A1 3196 3176 0.28 39.24 0.27 0.43
3 A1 1470 1461 17.72 65.42 0.11 0.20
4 A1 1375 1366 1.33 10.32 0.46 0.63
5 A1 1129 1122 0.13 35.99 0.11 0.20
6 A1 1063 1057 6.17 8.24 0.15 0.27
7 A1 980 974 43.65 2.38 0.21 0.34
8 A1 853 848 11.83 0.06 0.65 0.79
9 A2 823 818 0.00 0.23 0.75 0.86
10 A2 686 682 0.00 1.13 0.75 0.86
11 A2 594 590 0.00 0.01 0.75 0.86
12 B1 789 784 0.28 1.25 0.75 0.86
13 B1 718 714 112.43 0.06 0.75 0.86
14 B1 605 602 20.41 0.75 0.75 0.86
15 B2 3219 3199 0.20 15.41 0.75 0.86
16 B2 3185 3165 2.19 106.16 0.75 0.86
17 B2 1543 1533 0.04 0.08 0.75 0.86
18 B2 1226 1218 0.09 0.70 0.75 0.86
19 B2 1162 1155 16.39 0.13 0.75 0.86
20 B2 1018 1012 3.07 5.09 0.75 0.86
21 B2 855 850 0.60 2.05 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14856.4 cm-1
Scaled (by 0.9939) Zero Point Vibrational Energy (zpe) 14765.8 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 PBEPBE/aug-cc-pVDZ
ABC
0.31184 0.30342 0.15379

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/aug-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 1.102 0.351
C3 0.000 -1.102 0.351
C4 0.000 0.720 -0.968
C5 0.000 -0.720 -0.968
H6 0.000 2.068 0.858
H7 0.000 -2.068 0.858
H8 0.000 1.385 -1.835
H9 0.000 -1.385 -1.835

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.37341.37342.25612.25612.09192.09193.30903.3090
C21.37342.20401.37302.24871.09123.21062.20393.3108
C31.37342.20402.24871.37303.21061.09123.31082.2039
C42.25611.37302.24871.43912.26973.33241.09282.2760
C52.25612.24871.37301.43913.33242.26972.27601.0928
H62.09191.09123.21062.26973.33244.13672.77794.3788
H72.09193.21061.09123.33242.26974.13674.37882.7779
H83.30902.20393.31081.09282.27602.77794.37882.7697
H93.30903.31082.20392.27601.09284.37882.77792.7697

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.468 O1 C2 H6 115.682
O1 C3 C5 110.468 O1 C3 H7 115.682
C2 O1 C3 106.716 C2 C4 C5 106.174
C2 C4 H8 126.325 C3 C5 C4 106.174
C3 C5 H9 126.325 C4 C2 H6 133.850
C4 C5 H9 127.501 C5 C3 H7 133.850
C5 C4 H8 127.501
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.321      
2 C 0.193      
3 C 0.193      
4 C 0.968      
5 C 0.968      
6 H -0.507      
7 H -0.507      
8 H -0.494      
9 H -0.494      


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 -0.597 0.597
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.275 0.000 0.000
y 0.000 -24.686 0.000
z 0.000 0.000 -28.378
Traceless
 xyz
x -5.742 0.000 0.000
y 0.000 5.640 0.000
z 0.000 0.000 0.102
Polar
3z2-r20.204
x2-y2-7.588
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.291 0.000 0.000
y 0.000 9.054 0.000
z 0.000 0.000 8.202


<r2> (average value of r2) Å2
<r2> 82.825
(<r2>)1/2 9.101