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All results from a given calculation for C4H4O (Furan)

using model chemistry: B3PW91/STO-3G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/STO-3G
 hartrees
Energy at 0K-227.040058
Energy at 298.15K 
HF Energy-227.040058
Nuclear repulsion energy158.177236
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 B3PW91/STO-3G
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 3554 3145 6.38 97.01 0.12 0.21
2 A1 3517 3112 25.82 21.99 0.51 0.67
3 A1 1619 1433 4.19 15.39 0.33 0.49
4 A1 1516 1342 14.97 17.13 0.46 0.63
5 A1 1221 1080 0.81 22.73 0.31 0.47
6 A1 1145 1013 0.72 9.94 0.45 0.62
7 A1 1071 947 11.89 1.41 0.15 0.27
8 A1 907 803 6.69 0.17 0.46 0.63
9 A2 941 832 0.00 1.05 0.75 0.86
10 A2 771 683 0.00 2.26 0.75 0.86
11 A2 635 562 0.00 0.26 0.75 0.86
12 B1 903 799 0.05 0.76 0.75 0.86
13 B1 783 693 45.74 0.34 0.75 0.86
14 B1 613 542 1.55 1.46 0.75 0.86
15 B2 3538 3131 26.24 2.25 0.75 0.86
16 B2 3507 3104 12.03 66.25 0.75 0.86
17 B2 1715 1517 4.13 0.11 0.75 0.86
18 B2 1378 1220 5.31 0.23 0.75 0.86
19 B2 1278 1131 3.81 2.11 0.75 0.86
20 B2 1135 1005 1.68 5.88 0.75 0.86
21 B2 921 815 0.01 3.50 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16332.6 cm-1
Scaled (by 0.885) Zero Point Vibrational Energy (zpe) 14454.4 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 B3PW91/STO-3G
ABC
0.30799 0.29703 0.15121

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/STO-3G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.200
C2 0.000 1.111 0.342
C3 0.000 -1.111 0.342
C4 0.000 0.721 -0.973
C5 0.000 -0.721 -0.973
H6 0.000 2.091 0.832
H7 0.000 -2.091 0.832
H8 0.000 1.376 -1.847
H9 0.000 -1.376 -1.847

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.40331.40332.28922.28922.12282.12283.34283.3428
C21.40332.22161.37142.25531.09533.23872.20483.3132
C31.40332.22162.25531.37143.23871.09533.31322.2048
C42.28921.37142.25531.44292.26523.34131.09202.2726
C52.28922.25531.37141.44293.34132.26522.27261.0920
H62.12281.09533.23872.26523.34134.18132.77184.3811
H72.12283.23871.09533.34132.26524.18134.38112.7718
H83.34282.20483.31321.09202.27262.77184.38112.7530
H93.34283.31322.20482.27261.09204.38112.77182.7530

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 111.173 O1 C2 H6 115.787
O1 C3 C5 111.173 O1 C3 H7 115.787
C2 O1 C3 104.665 C2 C4 C5 106.495
C2 C4 H8 126.646 C3 C5 C4 106.495
C3 C5 H9 126.646 C4 C2 H6 133.040
C4 C5 H9 126.859 C5 C3 H7 133.040
C5 C4 H8 126.859
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/STO-3G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.122      
2 C -0.008      
3 C -0.008      
4 C -0.119      
5 C -0.119      
6 H 0.098      
7 H 0.098      
8 H 0.090      
9 H 0.090      


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 -0.272 0.272
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -28.160 0.000 0.000
y 0.000 -23.265 0.000
z 0.000 0.000 -26.237
Traceless
 xyz
x -3.409 0.000 0.000
y 0.000 3.933 0.000
z 0.000 0.000 -0.524
Polar
3z2-r2-1.048
x2-y2-4.895
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.752 0.000 0.000
y 0.000 4.776 0.000
z 0.000 0.000 4.222


<r2> (average value of r2) Å2
<r2> 82.232
(<r2>)1/2 9.068