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All results from a given calculation for C4H4O (Furan)

using model chemistry: mPW1PW91/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/6-31+G**
 hartrees
Energy at 0K-229.979636
Energy at 298.15K 
HF Energy-229.979636
Nuclear repulsion energy161.250370
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 mPW1PW91/6-31+G**
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 3332 3171 0.02 203.84 0.14 0.25
2 A1 3302 3143 0.08 38.10 0.26 0.41
3 A1 1540 1466 23.88 59.76 0.12 0.21
4 A1 1443 1373 1.77 18.14 0.36 0.53
5 A1 1180 1123 0.49 32.30 0.14 0.25
6 A1 1116 1062 16.99 6.36 0.11 0.19
7 A1 1032 983 44.66 1.05 0.28 0.43
8 A1 889 847 13.54 0.87 0.62 0.77
9 A2 891 848 0.00 0.70 0.75 0.86
10 A2 742 706 0.00 1.57 0.75 0.86
11 A2 614 584 0.00 0.04 0.75 0.86
12 B1 858 817 0.02 2.16 0.75 0.86
13 B1 765 728 128.44 0.19 0.75 0.86
14 B1 627 597 25.36 1.22 0.75 0.86
15 B2 3326 3165 0.15 15.15 0.75 0.86
16 B2 3291 3132 2.36 96.59 0.75 0.86
17 B2 1621 1543 0.03 0.21 0.75 0.86
18 B2 1296 1233 0.68 0.88 0.75 0.86
19 B2 1245 1185 18.60 0.08 0.75 0.86
20 B2 1079 1027 4.15 5.32 0.75 0.86
21 B2 892 849 0.62 4.28 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15539.0 cm-1
Scaled (by 0.9518) Zero Point Vibrational Energy (zpe) 14790.0 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 mPW1PW91/6-31+G**
ABC
0.31774 0.31057 0.15706

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31+G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.155
C2 0.000 1.090 0.349
C3 0.000 -1.090 0.349
C4 0.000 0.716 -0.958
C5 0.000 -0.716 -0.958
H6 0.000 2.045 0.849
H7 0.000 -2.045 0.849
H8 0.000 1.374 -1.813
H9 0.000 -1.374 -1.813

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.35581.35582.23022.23022.06792.06793.27033.2703
C21.35582.18071.35922.22901.07773.17512.18053.2781
C31.35582.18072.22901.35923.17511.07773.27812.1805
C42.23021.35922.22901.43112.24293.29911.07932.2576
C52.23022.22901.35921.43113.29912.24292.25761.0793
H62.06791.07773.17512.24293.29914.09032.74524.3328
H72.06793.17511.07773.29912.24294.09034.33282.7452
H83.27032.18053.27811.07932.25762.74524.33282.7473
H93.27033.27812.18052.25761.07934.33282.74522.7473

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.457 O1 C2 H6 115.910
O1 C3 C5 110.457 O1 C3 H7 115.910
C2 O1 C3 107.073 C2 C4 C5 106.006
C2 C4 H8 126.425 C3 C5 C4 106.006
C3 C5 H9 126.425 C4 C2 H6 133.633
C4 C5 H9 127.568 C5 C3 H7 133.633
C5 C4 H8 127.568
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.211      
2 C -0.152      
3 C -0.152      
4 C -0.087      
5 C -0.087      
6 H 0.174      
7 H 0.174      
8 H 0.170      
9 H 0.170      


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 -0.688 0.688
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.248 0.000 0.000
y 0.000 -23.959 0.000
z 0.000 0.000 -28.078
Traceless
 xyz
x -6.229 0.000 0.000
y 0.000 6.204 0.000
z 0.000 0.000 0.026
Polar
3z2-r20.051
x2-y2-8.289
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.577 0.000 0.000
y 0.000 7.919 0.000
z 0.000 0.000 7.515


<r2> (average value of r2) Å2
<r2> 81.244
(<r2>)1/2 9.014