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All results from a given calculation for C4H4O (Furan)

using model chemistry: B2PLYP/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
Energy calculated at B2PLYP/6-31G*
 hartrees
Energy at 0K 
Energy at 298.15K 
HF Energy-229.549126
Nuclear repulsion energy160.678526
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 B2PLYP/6-31G*
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 3334 3164 0.02 185.01 0.13 0.23
2 A1 3303 3135 1.20 37.79 0.22 0.36
3 A1 1539 1461 17.96 28.98 0.24 0.39
4 A1 1444 1370 4.88 13.65 0.44 0.61
5 A1 1181 1121 0.04 23.70 0.30 0.46
6 A1 1108 1051 8.49 8.93 0.18 0.30
7 A1 1032 979 39.39 1.56 0.18 0.30
8 A1 886 841 15.69 0.56 0.72 0.83
9 A2 845 802 0.00 1.26 0.75 0.86
10 A2 717 680 0.00 2.18 0.75 0.86
11 A2 606 575 0.00 0.06 0.75 0.86
12 B1 822 780 1.24 0.29 0.75 0.86
13 B1 758 719 85.95 0.92 0.75 0.86
14 B1 623 591 18.54 2.24 0.75 0.86
15 B2 3328 3159 1.95 18.26 0.75 0.86
16 B2 3292 3124 2.55 94.06 0.75 0.86
17 B2 1617 1535 0.53 0.10 0.75 0.86
18 B2 1309 1242 0.37 0.69 0.75 0.86
19 B2 1233 1170 21.16 1.39 0.75 0.86
20 B2 1081 1026 0.72 4.08 0.75 0.86
21 B2 893 847 0.31 3.60 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15474.4 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 14688.3 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 B2PLYP/6-31G*
ABC
0.31575 0.30812 0.15594

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.163
C2 0.000 1.095 0.347
C3 0.000 -1.095 0.347
C4 0.000 0.717 -0.961
C5 0.000 -0.717 -0.961
H6 0.000 2.049 0.849
H7 0.000 -2.049 0.849
H8 0.000 1.373 -1.818
H9 0.000 -1.373 -1.818

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.36561.36562.24092.24092.07312.07313.28173.2817
C21.36562.19051.36122.23471.07793.18432.18303.2832
C31.36562.19052.23471.36123.18431.07793.28322.1830
C42.24091.36122.23471.43392.24693.30541.07972.2589
C52.24092.23471.36121.43393.30542.24692.25891.0797
H62.07311.07793.18432.24693.30544.09852.75154.3386
H72.07313.18431.07793.30542.24694.09854.33862.7515
H83.28172.18303.28321.07972.25892.75154.33862.7455
H93.28173.28322.18302.25891.07974.33862.75152.7455

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.534 O1 C2 H6 115.584
O1 C3 C5 110.534 O1 C3 H7 115.584
C2 O1 C3 106.656 C2 C4 C5 106.138
C2 C4 H8 126.461 C3 C5 C4 106.138
C3 C5 H9 126.461 C4 C2 H6 133.882
C4 C5 H9 127.401 C5 C3 H7 133.882
C5 C4 H8 127.401
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.405      
2 C 0.070      
3 C 0.070      
4 C -0.200      
5 C -0.200      
6 H 0.172      
7 H 0.172      
8 H 0.161      
9 H 0.161      


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 -0.654 0.654
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.258 0.000 0.000
y 0.000 -23.704 0.000
z 0.000 0.000 -27.789
Traceless
 xyz
x -5.512 0.000 0.000
y 0.000 5.820 0.000
z 0.000 0.000 -0.308
Polar
3z2-r2-0.617
x2-y2-7.555
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.524 0.000 0.000
y 0.000 7.101 0.000
z 0.000 0.000 6.649


<r2> (average value of r2) Å2
<r2> 81.338
(<r2>)1/2 9.019