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All results from a given calculation for C4H4O (Furan)

using model chemistry: HF/aug-cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/aug-cc-pVQZ
 hartrees
Energy at 0K-228.725673
Energy at 298.15K 
HF Energy-228.725673
Nuclear repulsion energy163.020177
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 HF/aug-cc-pVQZ
Rotational Constants (cm-1) from geometry optimized at HF/aug-cc-pVQZ
ABC
0.32157 0.32018 0.16044

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/aug-cc-pVQZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.138
C2 0.000 1.078 0.344
C3 0.000 -1.078 0.344
C4 0.000 0.720 -0.943
C5 0.000 -0.720 -0.943
H6 0.000 2.027 0.829
H7 0.000 -2.027 0.829
H8 0.000 1.374 -1.786
H9 0.000 -1.374 -1.786

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.33921.33922.20192.20192.05072.05073.23093.2309
C21.33922.15641.33562.21091.06603.14322.15023.2480
C31.33922.15642.21091.33563.14321.06603.24802.1502
C42.20191.33562.21091.43952.20223.26901.06732.2573
C52.20192.21091.33561.43953.26902.20222.25731.0673
H62.05071.06603.14322.20223.26904.05452.69554.2905
H72.05073.14321.06603.26902.20224.05454.29052.6955
H83.23092.15023.24801.06732.25732.69554.29052.7482
H93.23093.24802.15022.25731.06734.29052.69552.7482

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.812 O1 C2 H6 116.532
O1 C3 C5 110.812 O1 C3 H7 116.532
C2 O1 C3 107.241 C2 C4 C5 105.567
C2 C4 H8 126.619 C3 C5 C4 105.567
C3 C5 H9 126.619 C4 C2 H6 132.655
C4 C5 H9 127.814 C5 C3 H7 132.655
C5 C4 H8 127.814
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/aug-cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.639      
2 C -0.264      
3 C -0.264      
4 C -0.537      
5 C -0.537      
6 H 0.623      
7 H 0.623      
8 H 0.497      
9 H 0.497      


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 -0.689 0.689
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.323 0.000 0.000
y 0.000 -24.322 0.000
z 0.000 0.000 -28.190
Traceless
 xyz
x -6.066 0.000 0.000
y 0.000 5.934 0.000
z 0.000 0.000 0.132
Polar
3z2-r20.264
x2-y2-8.000
xy0.000
xz0.000
yz0.000


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


<r2> (average value of r2) Å2
<r2> 80.027
(<r2>)1/2 8.946