return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C4H4O (Furan)

using model chemistry: B3LYP/SDD

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3LYP/SDD
 hartrees
Energy at 0K-229.986049
Energy at 298.15K 
HF Energy-229.986049
Nuclear repulsion energy158.361918
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 B3LYP/SDD
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 3341 3211 0.32 170.67 0.13 0.23
2 A1 3296 3169 0.46 32.91 0.21 0.35
3 A1 1490 1432 15.15 52.06 0.26 0.41
4 A1 1403 1349 5.12 10.78 0.38 0.55
5 A1 1155 1110 0.69 24.32 0.28 0.44
6 A1 1076 1035 0.29 9.71 0.12 0.21
7 A1 990 952 53.01 5.34 0.22 0.37
8 A1 872 838 19.87 2.05 0.73 0.84
9 A2 926 890 0.00 0.31 0.75 0.86
10 A2 752 723 0.00 2.49 0.75 0.86
11 A2 615 592 0.00 0.01 0.75 0.86
12 B1 883 849 1.49 3.99 0.75 0.86
13 B1 769 739 173.14 0.67 0.75 0.86
14 B1 605 581 25.63 3.36 0.75 0.86
15 B2 3330 3201 1.15 16.35 0.75 0.86
16 B2 3282 3155 4.03 74.42 0.75 0.86
17 B2 1578 1517 0.91 0.41 0.75 0.86
18 B2 1283 1233 0.76 0.51 0.75 0.86
19 B2 1184 1138 27.25 1.66 0.75 0.86
20 B2 1038 998 1.55 3.98 0.75 0.86
21 B2 889 855 0.04 6.91 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15378.2 cm-1
Scaled (by 0.9613) Zero Point Vibrational Energy (zpe) 14783.0 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 B3LYP/SDD
ABC
0.30434 0.30130 0.15140

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/SDD

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.181
C2 0.000 1.123 0.347
C3 0.000 -1.123 0.347
C4 0.000 0.725 -0.970
C5 0.000 -0.725 -0.970
H6 0.000 2.079 0.846
H7 0.000 -2.079 0.846
H8 0.000 1.374 -1.834
H9 0.000 -1.374 -1.834

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.39851.39852.27002.27002.10552.10553.31313.3131
C21.39852.24561.37592.26941.07803.24002.19553.3151
C31.39852.24562.26941.37593.24001.07803.31512.1955
C42.27001.37592.26941.45052.26463.34041.08022.2698
C52.27002.26941.37591.45053.34042.26462.26981.0802
H62.10551.07803.24002.26463.34044.15722.77084.3702
H72.10553.24001.07803.34042.26464.15724.37022.7708
H83.31312.19553.31511.08022.26982.77084.37022.7475
H93.31313.31512.19552.26981.08024.37022.77082.7475

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 109.804 O1 C2 H6 115.855
O1 C3 C5 109.804 O1 C3 H7 115.855
C2 O1 C3 106.803 C2 C4 C5 106.795
C2 C4 H8 126.310 C3 C5 C4 106.795
C3 C5 H9 126.310 C4 C2 H6 134.342
C4 C5 H9 126.895 C5 C3 H7 134.342
C5 C4 H8 126.895
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.244      
2 C -0.124      
3 C -0.124      
4 C -0.261      
5 C -0.261      
6 H 0.257      
7 H 0.257      
8 H 0.250      
9 H 0.250      


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 -1.137 1.137
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.301 0.000 0.000
y 0.000 -23.166 0.000
z 0.000 0.000 -28.603
Traceless
 xyz
x -6.416 0.000 0.000
y 0.000 7.286 0.000
z 0.000 0.000 -0.869
Polar
3z2-r2-1.739
x2-y2-9.135
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.778 0.000 0.000
y 0.000 7.124 0.000
z 0.000 0.000 6.775


<r2> (average value of r2) Å2
<r2> 83.411
(<r2>)1/2 9.133