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All results from a given calculation for C4H4O (Furan)

using model chemistry: PBEPBE/cc-pVTZ

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/cc-pVTZ
 hartrees
Energy at 0K-229.828222
Energy at 298.15K 
HF Energy-229.828222
Nuclear repulsion energy160.332906
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/cc-pVTZ
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 3211 3189 0.01 233.56 0.14 0.24
2 A1 3184 3162 0.63 31.55 0.36 0.52
3 A1 1469 1459 15.40 38.06 0.17 0.29
4 A1 1378 1369 2.84 11.19 0.41 0.58
5 A1 1134 1126 0.15 28.35 0.17 0.30
6 A1 1070 1063 6.58 8.12 0.22 0.36
7 A1 988 981 40.12 1.68 0.20 0.33
8 A1 858 852 13.52 0.26 0.75 0.86
9 A2 846 840 0.00 0.37 0.75 0.86
10 A2 695 691 0.00 0.18 0.75 0.86
11 A2 599 595 0.00 0.01 0.75 0.86
12 B1 806 801 0.15 0.09 0.75 0.86
13 B1 727 722 99.98 0.54 0.75 0.86
14 B1 611 607 18.79 1.41 0.75 0.86
15 B2 3204 3181 0.88 12.84 0.75 0.86
16 B2 3174 3152 2.16 108.87 0.75 0.86
17 B2 1546 1535 0.18 0.30 0.75 0.86
18 B2 1242 1234 0.20 0.64 0.75 0.86
19 B2 1168 1160 16.47 0.68 0.75 0.86
20 B2 1028 1021 2.49 4.32 0.75 0.86
21 B2 863 857 0.37 2.80 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14899.7 cm-1
Scaled (by 0.9931) Zero Point Vibrational Energy (zpe) 14796.9 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/cc-pVTZ
ABC
0.31475 0.30663 0.15532

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.166
C2 0.000 1.097 0.348
C3 0.000 -1.097 0.348
C4 0.000 0.717 -0.962
C5 0.000 -0.717 -0.962
H6 0.000 2.058 0.849
H7 0.000 -2.058 0.849
H8 0.000 1.376 -1.824
H9 0.000 -1.376 -1.824

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.36851.36852.24562.24562.08182.08183.29113.2911
C21.36852.19421.36442.23741.08373.19442.18963.2912
C31.36852.19422.23741.36443.19441.08373.29122.1896
C42.24561.36442.23741.43302.25433.31351.08492.2627
C52.24562.23741.36441.43303.31352.25432.26271.0849
H62.08181.08373.19442.25433.31354.11532.75914.3516
H72.08183.19441.08373.31352.25434.11534.35162.7591
H83.29112.18963.29121.08492.26272.75914.35162.7515
H93.29113.29122.18962.26271.08494.35162.75912.7515

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.508 O1 C2 H6 115.714
O1 C3 C5 110.508 O1 C3 H7 115.714
C2 O1 C3 106.588 C2 C4 C5 106.198
C2 C4 H8 126.380 C3 C5 C4 106.198
C3 C5 H9 126.380 C4 C2 H6 133.778
C4 C5 H9 127.422 C5 C3 H7 133.778
C5 C4 H8 127.422
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/cc-pVTZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.117      
2 C -0.012      
3 C -0.012      
4 C -0.148      
5 C -0.148      
6 H 0.115      
7 H 0.115      
8 H 0.104      
9 H 0.104      


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 -0.522 0.522
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.821 0.000 0.000
y 0.000 -24.348 0.000
z 0.000 0.000 -27.934
Traceless
 xyz
x -5.680 0.000 0.000
y 0.000 5.529 0.000
z 0.000 0.000 0.151
Polar
3z2-r20.302
x2-y2-7.473
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.045 0.000 0.000
y 0.000 8.257 0.000
z 0.000 0.000 7.547


<r2> (average value of r2) Å2
<r2> 81.904
(<r2>)1/2 9.050