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All results from a given calculation for C4H4O (Furan)

using model chemistry: PBE1PBE/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 PBE1PBE/6-311G*
 hartrees
Energy at 0K-229.806018
Energy at 298.15K 
HF Energy-229.806018
Nuclear repulsion energy161.580102
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 PBE1PBE/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 3308 3170 0.02 195.19 0.14 0.25
2 A1 3278 3142 1.49 30.51 0.29 0.45
3 A1 1542 1478 21.09 35.56 0.19 0.32
4 A1 1440 1380 2.50 14.02 0.41 0.58
5 A1 1181 1132 0.91 26.62 0.21 0.35
6 A1 1116 1070 17.02 5.62 0.24 0.39
7 A1 1030 987 43.31 0.75 0.23 0.37
8 A1 894 857 13.84 0.65 0.71 0.83
9 A2 875 839 0.00 0.93 0.75 0.86
10 A2 734 703 0.00 0.22 0.75 0.86
11 A2 619 593 0.00 0.01 0.75 0.86
12 B1 842 807 0.00 0.27 0.75 0.86
13 B1 760 728 113.28 0.81 0.75 0.86
14 B1 633 606 26.29 1.89 0.75 0.86
15 B2 3301 3164 3.01 13.91 0.75 0.86
16 B2 3266 3131 2.76 98.62 0.75 0.86
17 B2 1621 1554 0.78 0.51 0.75 0.86
18 B2 1293 1239 0.30 0.69 0.75 0.86
19 B2 1238 1187 19.00 0.38 0.75 0.86
20 B2 1074 1030 4.24 4.60 0.75 0.86
21 B2 898 860 0.33 3.80 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15470.8 cm-1
Scaled (by 0.9585) Zero Point Vibrational Energy (zpe) 14828.7 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 PBE1PBE/6-311G*
ABC
0.31950 0.31148 0.15772

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/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 1.086 0.348
C3 0.000 -1.086 0.348
C4 0.000 0.715 -0.956
C5 0.000 -0.715 -0.956
H6 0.000 2.040 0.851
H7 0.000 -2.040 0.851
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
O11.35221.35222.22682.22682.06232.06233.26753.2675
C21.35222.17231.35552.22321.07843.16642.17863.2729
C31.35222.17232.22321.35553.16641.07843.27292.1786
C42.22681.35552.22321.42942.24073.29441.08002.2565
C52.22682.22321.35551.42943.29442.24072.25651.0800
H62.06231.07843.16642.24073.29444.08002.74514.3290
H72.06233.16641.07843.29442.24074.08004.32902.7451
H83.26752.17863.27291.08002.25652.74514.32902.7462
H93.26753.27292.17862.25651.08004.32902.74512.7462

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.652 O1 C2 H6 115.627
O1 C3 C5 110.652 O1 C3 H7 115.627
C2 O1 C3 106.887 C2 C4 C5 105.905
C2 C4 H8 126.532 C3 C5 C4 105.905
C3 C5 H9 126.532 C4 C2 H6 133.721
C4 C5 H9 127.563 C5 C3 H7 133.721
C5 C4 H8 127.563
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.220      
2 C -0.040      
3 C -0.040      
4 C -0.288      
5 C -0.288      
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 -0.573 0.573
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.938 0.000 0.000
y 0.000 -23.702 0.000
z 0.000 0.000 -27.604
Traceless
 xyz
x -6.285 0.000 0.000
y 0.000 6.069 0.000
z 0.000 0.000 0.216
Polar
3z2-r20.433
x2-y2-8.236
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.247 0.000 0.000
y 0.000 7.387 0.000
z 0.000 0.000 6.906


<r2> (average value of r2) Å2
<r2> 80.779
(<r2>)1/2 8.988