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All results from a given calculation for C4H4O (Furan)

using model chemistry: PBE1PBE/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 PBE1PBE/6-31+G**
 hartrees
Energy at 0K-229.772234
Energy at 298.15K 
HF Energy-229.772234
Nuclear repulsion energy161.218263
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/6-31+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 3325 3177 0.02 206.03 0.14 0.24
2 A1 3296 3149 0.01 36.09 0.27 0.42
3 A1 1540 1471 24.05 61.56 0.12 0.21
4 A1 1442 1377 1.59 17.42 0.36 0.53
5 A1 1179 1126 0.67 33.16 0.14 0.24
6 A1 1117 1067 16.91 6.09 0.13 0.23
7 A1 1031 985 44.29 1.03 0.29 0.45
8 A1 888 848 13.13 0.81 0.61 0.75
9 A2 888 849 0.00 0.68 0.75 0.86
10 A2 740 707 0.00 1.58 0.75 0.86
11 A2 613 586 0.00 0.03 0.75 0.86
12 B1 855 817 0.03 2.15 0.75 0.86
13 B1 763 729 128.89 0.18 0.75 0.86
14 B1 627 599 25.51 1.20 0.75 0.86
15 B2 3319 3171 0.06 14.29 0.75 0.86
16 B2 3285 3138 2.19 97.37 0.75 0.86
17 B2 1620 1548 0.03 0.19 0.75 0.86
18 B2 1291 1234 0.96 0.92 0.75 0.86
19 B2 1247 1191 18.05 0.06 0.75 0.86
20 B2 1077 1029 4.62 5.36 0.75 0.86
21 B2 889 850 0.60 4.21 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15517.0 cm-1
Scaled (by 0.9553) Zero Point Vibrational Energy (zpe) 14823.4 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/6-31+G**
ABC
0.31777 0.31033 0.15700

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBE1PBE/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 0.715 -0.958
C5 0.000 -0.715 -0.958
H6 0.000 2.046 0.850
H7 0.000 -2.046 0.850
H8 0.000 1.375 -1.815
H9 0.000 -1.375 -1.815

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.35531.35532.23072.23072.06862.06863.27203.2720
C21.35532.18001.35992.22911.07923.17582.18233.2797
C31.35532.18002.22911.35993.17581.07923.27972.1823
C42.23071.35992.22911.43102.24483.30071.08072.2589
C52.23072.22911.35991.43103.30072.24482.25891.0807
H62.06861.07923.17582.24483.30074.09212.74764.3360
H72.06863.17581.07923.30072.24484.09214.33602.7476
H83.27202.18233.27971.08072.25892.74764.33602.7495
H93.27203.27972.18232.25891.08074.33602.74762.7495

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.477 O1 C2 H6 115.896
O1 C3 C5 110.477 O1 C3 H7 115.896
C2 O1 C3 107.074 C2 C4 C5 105.986
C2 C4 H8 126.424 C3 C5 C4 105.986
C3 C5 H9 126.424 C4 C2 H6 133.628
C4 C5 H9 127.590 C5 C3 H7 133.628
C5 C4 H8 127.590
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBE1PBE/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.213      
2 C -0.148      
3 C -0.148      
4 C -0.090      
5 C -0.090      
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 -0.670 0.670
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.331 0.000 0.000
y 0.000 -24.031 0.000
z 0.000 0.000 -28.113
Traceless
 xyz
x -6.259 0.000 0.000
y 0.000 6.191 0.000
z 0.000 0.000 0.068
Polar
3z2-r20.136
x2-y2-8.300
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.611 0.000 0.000
y 0.000 7.951 0.000
z 0.000 0.000 7.533


<r2> (average value of r2) Å2
<r2> 81.315
(<r2>)1/2 9.017