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: wB97X-D/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at wB97X-D/6-311+G(3df,2p)
 hartrees
Energy at 0K-230.021833
Energy at 298.15K 
HF Energy-230.021833
Nuclear repulsion energy161.920304
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 wB97X-D/6-311+G(3df,2p)
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 3297 3297 0.02 204.05 0.11 0.20
2 A1 3271 3271 0.10 25.19 0.35 0.52
3 A1 1539 1539 22.59 60.40 0.10 0.18
4 A1 1436 1436 2.93 21.38 0.28 0.44
5 A1 1179 1179 0.65 33.95 0.13 0.23
6 A1 1110 1110 19.08 5.84 0.07 0.13
7 A1 1028 1028 37.70 0.72 0.34 0.51
8 A1 895 895 14.72 0.24 0.62 0.77
9 A2 915 915 0.00 0.63 0.75 0.86
10 A2 761 761 0.00 1.85 0.75 0.86
11 A2 622 622 0.00 0.08 0.75 0.86
12 B1 885 885 0.25 1.97 0.75 0.86
13 B1 775 775 110.79 0.02 0.75 0.86
14 B1 631 631 25.10 0.83 0.75 0.86
15 B2 3290 3290 0.49 8.67 0.75 0.86
16 B2 3261 3261 2.09 91.84 0.75 0.86
17 B2 1619 1619 0.03 0.24 0.75 0.86
18 B2 1303 1303 0.48 0.60 0.75 0.86
19 B2 1239 1239 18.59 0.06 0.75 0.86
20 B2 1079 1079 2.32 5.24 0.75 0.86
21 B2 897 897 0.84 2.97 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15515.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15515.2 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 wB97X-D/6-311+G(3df,2p)
ABC
0.31976 0.31379 0.15837

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/6-311+G(3df,2p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.149
C2 0.000 1.085 0.347
C3 0.000 -1.085 0.347
C4 0.000 0.715 -0.952
C5 0.000 -0.715 -0.952
H6 0.000 2.040 0.842
H7 0.000 -2.040 0.842
H8 0.000 1.372 -1.805
H9 0.000 -1.372 -1.805

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.34991.34992.22012.22012.06302.06303.25723.2572
C21.34992.17061.35072.22001.07543.16422.17053.2660
C31.34992.17062.22001.35073.16421.07543.26602.1705
C42.22011.35072.22001.43012.23033.28761.07622.2544
C52.22012.22001.35071.43013.28762.23032.25441.0762
H62.06301.07543.16422.23033.28764.07982.72964.3180
H72.06303.16421.07543.28762.23034.07984.31802.7296
H83.25722.17053.26601.07622.25442.72964.31802.7439
H93.25723.26602.17052.25441.07624.31802.72962.7439

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.581 O1 C2 H6 116.096
O1 C3 C5 110.581 O1 C3 H7 116.096
C2 O1 C3 107.021 C2 C4 C5 105.909
C2 C4 H8 126.473 C3 C5 C4 105.909
C3 C5 H9 126.473 C4 C2 H6 133.322
C4 C5 H9 127.618 C5 C3 H7 133.322
C5 C4 H8 127.618
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.555      
2 C 0.081      
3 C 0.081      
4 C -0.111      
5 C -0.111      
6 H 0.158      
7 H 0.158      
8 H 0.149      
9 H 0.149      


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 -0.620 0.620
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.992 0.000 0.000
y 0.000 -24.147 0.000
z 0.000 0.000 -27.899
Traceless
 xyz
x -5.969 0.000 0.000
y 0.000 5.798 0.000
z 0.000 0.000 0.170
Polar
3z2-r20.341
x2-y2-7.845
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.085 0.000 0.000
y 0.000 8.322 0.000
z 0.000 0.000 7.717


<r2> (average value of r2) Å2
<r2> 80.679
(<r2>)1/2 8.982