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All results from a given calculation for C4H4O (Furan)

using model chemistry: PBEPBE/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at PBEPBE/6-31G(2df,p)
 hartrees
Energy at 0K-229.762025
Energy at 298.15K 
HF Energy-229.762025
Nuclear repulsion energy160.192560
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 PBEPBE/6-31G(2df,p)
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 3224 3191 0.01 211.26 0.12 0.21
2 A1 3198 3165 0.74 22.16 0.46 0.63
3 A1 1474 1459 14.23 28.08 0.21 0.35
4 A1 1379 1365 3.58 10.25 0.43 0.60
5 A1 1137 1126 0.26 26.23 0.21 0.35
6 A1 1080 1069 6.09 10.12 0.24 0.38
7 A1 993 983 35.24 1.57 0.31 0.47
8 A1 858 849 12.36 0.14 0.75 0.86
9 A2 820 811 0.00 0.81 0.75 0.86
10 A2 693 686 0.00 1.48 0.75 0.86
11 A2 596 590 0.00 0.06 0.75 0.86
12 B1 777 769 4.00 0.56 0.75 0.86
13 B1 731 724 76.45 0.44 0.75 0.86
14 B1 611 605 12.13 1.88 0.75 0.86
15 B2 3216 3183 1.39 9.35 0.75 0.86
16 B2 3188 3155 1.71 106.82 0.75 0.86
17 B2 1550 1534 0.46 0.16 0.75 0.86
18 B2 1236 1223 0.00 0.89 0.75 0.86
19 B2 1186 1173 16.00 1.12 0.75 0.86
20 B2 1033 1022 2.43 4.07 0.75 0.86
21 B2 860 851 0.20 2.84 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14919.8 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 14766.1 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 PBEPBE/6-31G(2df,p)
ABC
0.31475 0.30551 0.15503

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.166
C2 0.000 1.096 0.349
C3 0.000 -1.096 0.349
C4 0.000 0.718 -0.965
C5 0.000 -0.718 -0.965
H6 0.000 2.055 0.859
H7 0.000 -2.055 0.859
H8 0.000 1.379 -1.828
H9 0.000 -1.379 -1.828

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.36671.36672.24842.24842.07812.07813.29563.2956
C21.36672.19251.36792.24031.08583.19242.19533.2964
C31.36672.19252.24031.36793.19241.08583.29642.1953
C42.24841.36792.24031.43582.26153.31901.08672.2673
C52.24842.24031.36791.43583.31902.26152.26731.0867
H62.07811.08583.19242.26153.31904.11052.76994.3600
H72.07813.19241.08583.31902.26154.11054.36002.7699
H83.29562.19533.29641.08672.26732.76994.36002.7580
H93.29563.29642.19532.26731.08674.36002.76992.7580

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.610 O1 C2 H6 115.367
O1 C3 C5 110.610 O1 C3 H7 115.367
C2 O1 C3 106.662 C2 C4 C5 106.059
C2 C4 H8 126.469 C3 C5 C4 106.059
C3 C5 H9 126.469 C4 C2 H6 134.023
C4 C5 H9 127.472 C5 C3 H7 134.023
C5 C4 H8 127.472
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.106      
2 C -0.013      
3 C -0.013      
4 C -0.183      
5 C -0.183      
6 H 0.136      
7 H 0.136      
8 H 0.113      
9 H 0.113      


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 -0.472 0.472
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.888 0.000 0.000
y 0.000 -23.908 0.000
z 0.000 0.000 -27.313
Traceless
 xyz
x -5.278 0.000 0.000
y 0.000 5.193 0.000
z 0.000 0.000 0.085
Polar
3z2-r20.171
x2-y2-6.981
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.155 0.000 0.000
y 0.000 7.720 0.000
z 0.000 0.000 7.011


<r2> (average value of r2) Å2
<r2> 81.617
(<r2>)1/2 9.034