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All results from a given calculation for C4H4O (Furan)

using model chemistry: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-228.655344
Energy at 298.15K 
HF Energy-228.655344
Nuclear repulsion energy159.715806
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 B1B95/3-21G
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 3363 3218 0.08 163.50 0.12 0.21
2 A1 3325 3181 0.00 27.92 0.29 0.45
3 A1 1506 1441 9.19 33.68 0.26 0.41
4 A1 1416 1354 10.41 11.64 0.47 0.64
5 A1 1173 1123 0.02 20.49 0.40 0.57
6 A1 1088 1041 1.80 9.68 0.13 0.24
7 A1 1017 973 29.13 2.30 0.20 0.34
8 A1 886 848 25.87 0.84 0.54 0.70
9 A2 937 896 0.00 1.25 0.75 0.86
10 A2 781 747 0.00 1.97 0.75 0.86
11 A2 627 600 0.00 0.07 0.75 0.86
12 B1 910 870 0.01 0.00 0.75 0.86
13 B1 786 752 130.77 1.15 0.75 0.86
14 B1 623 596 26.09 2.86 0.75 0.86
15 B2 3353 3207 0.01 16.17 0.75 0.86
16 B2 3313 3170 1.67 83.23 0.75 0.86
17 B2 1601 1532 2.56 0.15 0.75 0.86
18 B2 1303 1247 1.39 0.25 0.75 0.86
19 B2 1196 1144 19.63 2.31 0.75 0.86
20 B2 1056 1011 0.10 4.19 0.75 0.86
21 B2 911 871 0.01 3.73 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15584.9 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 14910.0 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 B1B95/3-21G
ABC
0.30900 0.30726 0.15406

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.174
C2 0.000 1.114 0.340
C3 0.000 -1.114 0.340
C4 0.000 0.720 -0.958
C5 0.000 -0.720 -0.958
H6 0.000 2.068 0.829
H7 0.000 -2.068 0.829
H8 0.000 1.360 -1.821
H9 0.000 -1.360 -1.821

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.39111.39112.25032.25032.09622.09623.28913.2891
C21.39112.22741.35682.24691.07193.21872.17513.2850
C31.39112.22742.24691.35683.21871.07193.28502.1751
C42.25031.35682.24691.44002.23853.31141.07432.2521
C52.25032.24691.35681.44003.31142.23852.25211.0743
H62.09621.07193.21872.23853.31144.13532.74284.3328
H72.09623.21871.07193.31142.23854.13534.33282.7428
H83.28912.17513.28501.07432.25212.74284.33282.7206
H93.28913.28502.17512.25211.07434.33282.74282.7206

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 109.947 O1 C2 H6 116.053
O1 C3 C5 109.947 O1 C3 H7 116.053
C2 O1 C3 106.374 C2 C4 C5 106.866
C2 C4 H8 126.549 C3 C5 C4 106.866
C3 C5 H9 126.549 C4 C2 H6 134.000
C4 C5 H9 126.585 C5 C3 H7 134.000
C5 C4 H8 126.585
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.487      
2 C 0.059      
3 C 0.059      
4 C -0.281      
5 C -0.281      
6 H 0.246      
7 H 0.246      
8 H 0.219      
9 H 0.219      


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 -0.852 0.852
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.008 0.000 0.000
y 0.000 -22.947 0.000
z 0.000 0.000 -27.988
Traceless
 xyz
x -6.540 0.000 0.000
y 0.000 7.051 0.000
z 0.000 0.000 -0.511
Polar
3z2-r2-1.021
x2-y2-9.061
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 1.816 0.000 0.000
y 0.000 6.726 0.000
z 0.000 0.000 6.206


<r2> (average value of r2) Å2
<r2> 82.059
(<r2>)1/2 9.059