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All results from a given calculation for C4H4O (Furan)

using model chemistry: HF/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-228.644521
Energy at 298.15K 
HF Energy-228.644521
Nuclear repulsion energy162.281635
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/cc-pVDZ
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 3457 3139 0.01 190.48 0.13 0.24
2 A1 3423 3108 0.66 32.08 0.23 0.38
3 A1 1671 1517 33.66 46.62 0.17 0.29
4 A1 1534 1393 1.62 16.97 0.39 0.56
5 A1 1249 1134 1.71 28.01 0.31 0.47
6 A1 1156 1050 41.44 5.29 0.11 0.21
7 A1 1074 975 39.27 0.24 0.37 0.54
8 A1 952 864 18.05 0.50 0.64 0.78
9 A2 998 907 0.00 1.68 0.75 0.86
10 A2 847 769 0.00 1.61 0.75 0.86
11 A2 659 598 0.00 0.13 0.75 0.86
12 B1 985 895 1.16 1.37 0.75 0.86
13 B1 851 773 88.90 0.87 0.75 0.86
14 B1 658 597 35.49 2.95 0.75 0.86
15 B2 3450 3133 2.81 12.92 0.75 0.86
16 B2 3410 3096 3.90 96.93 0.75 0.86
17 B2 1755 1593 1.98 1.95 0.75 0.86
18 B2 1385 1258 0.14 0.62 0.75 0.86
19 B2 1305 1185 23.07 0.44 0.75 0.86
20 B2 1145 1040 0.37 6.70 0.75 0.86
21 B2 957 869 1.14 4.70 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 16460.3 cm-1
Scaled (by 0.908) Zero Point Vibrational Energy (zpe) 14946.0 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 HF/cc-pVDZ
ABC
0.31951 0.31663 0.15903

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.143
C2 0.000 1.081 0.346
C3 0.000 -1.081 0.346
C4 0.000 0.722 -0.948
C5 0.000 -0.722 -0.948
H6 0.000 2.037 0.839
H7 0.000 -2.037 0.839
H8 0.000 1.383 -1.799
H9 0.000 -1.383 -1.799

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.34311.34312.21242.21242.05912.05913.25043.2504
C21.34312.16211.34322.21931.07533.15642.16583.2663
C31.34312.16212.21931.34323.15641.07533.26632.1658
C42.21241.34322.21931.44342.21903.28681.07702.2696
C52.21242.21931.34321.44343.28682.21902.26961.0770
H62.05911.07533.15642.21903.28684.07312.71784.3184
H72.05913.15641.07533.28682.21904.07314.31842.7178
H83.25042.16583.26631.07702.26962.71784.31842.7650
H93.25043.26632.16582.26961.07704.31842.71782.7650

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.885 O1 C2 H6 116.295
O1 C3 C5 110.885 O1 C3 H7 116.295
C2 O1 C3 107.198 C2 C4 C5 105.516
C2 C4 H8 126.635 C3 C5 C4 105.516
C3 C5 H9 126.635 C4 C2 H6 132.820
C4 C5 H9 127.849 C5 C3 H7 132.820
C5 C4 H8 127.849
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.315      
2 C 0.185      
3 C 0.185      
4 C -0.098      
5 C -0.098      
6 H 0.043      
7 H 0.043      
8 H 0.028      
9 H 0.028      


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 -0.656 0.656
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.062 0.000 0.000
y 0.000 -23.829 0.000
z 0.000 0.000 -28.097
Traceless
 xyz
x -6.099 0.000 0.000
y 0.000 6.250 0.000
z 0.000 0.000 -0.151
Polar
3z2-r2-0.302
x2-y2-8.233
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.856 0.000 0.000
y 0.000 6.892 0.000
z 0.000 0.000 6.809


<r2> (average value of r2) Å2
<r2> 80.437
(<r2>)1/2 8.969