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/cc-pVQZ

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/cc-pVQZ
 hartrees
Energy at 0K-230.042857
Energy at 298.15K 
HF Energy-230.042857
Nuclear repulsion energy161.955153
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/cc-pVQZ
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 3300 3300 0.01 215.89 0.11 0.20
2 A1 3276 3276 0.14 23.99 0.38 0.55
3 A1 1539 1539 20.99 47.70 0.13 0.23
4 A1 1437 1437 3.22 18.35 0.31 0.48
5 A1 1179 1179 0.66 30.69 0.16 0.28
6 A1 1109 1109 17.98 5.81 0.11 0.20
7 A1 1027 1027 37.55 0.63 0.24 0.38
8 A1 895 895 14.98 0.32 0.71 0.83
9 A2 918 918 0.00 0.55 0.75 0.86
10 A2 763 763 0.00 0.03 0.75 0.86
11 A2 624 624 0.00 0.04 0.75 0.86
12 B1 886 886 0.17 0.97 0.75 0.86
13 B1 776 776 104.75 0.18 0.75 0.86
14 B1 633 633 24.42 1.17 0.75 0.86
15 B2 3293 3293 0.70 7.94 0.75 0.86
16 B2 3266 3266 1.99 95.46 0.75 0.86
17 B2 1621 1621 0.19 0.43 0.75 0.86
18 B2 1304 1304 0.56 0.52 0.75 0.86
19 B2 1238 1238 18.60 0.18 0.75 0.86
20 B2 1079 1079 2.43 5.14 0.75 0.86
21 B2 899 899 0.70 3.21 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15530.5 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15530.5 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/cc-pVQZ
ABC
0.31995 0.31386 0.15844

See section I.F.4 to change rotational constant units
Geometric Data calculated at wB97X-D/cc-pVQZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.150
C2 0.000 1.085 0.346
C3 0.000 -1.085 0.346
C4 0.000 0.715 -0.952
C5 0.000 -0.715 -0.952
H6 0.000 2.040 0.840
H7 0.000 -2.040 0.840
H8 0.000 1.371 -1.804
H9 0.000 -1.371 -1.804

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.35011.35012.22012.22012.06292.06293.25663.2566
C21.35012.17001.35022.21931.07473.16332.16953.2645
C31.35012.17002.21931.35023.16331.07473.26452.1695
C42.22011.35022.21931.42962.22873.28611.07552.2531
C52.22012.21931.35021.42963.28612.22872.25311.0755
H62.06291.07473.16332.22873.28614.07902.72754.3155
H72.06293.16331.07473.28612.22874.07904.31552.7275
H83.25662.16953.26451.07552.25312.72754.31552.7420
H93.25663.26452.16952.25311.07554.31552.72752.7420

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.606 O1 C2 H6 116.128
O1 C3 C5 110.606 O1 C3 H7 116.128
C2 O1 C3 106.962 C2 C4 C5 105.913
C2 C4 H8 126.486 C3 C5 C4 105.913
C3 C5 H9 126.486 C4 C2 H6 133.265
C4 C5 H9 127.601 C5 C3 H7 133.265
C5 C4 H8 127.601
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at wB97X-D/cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.270      
2 C 0.108      
3 C 0.108      
4 C -0.176      
5 C -0.176      
6 H 0.115      
7 H 0.115      
8 H 0.088      
9 H 0.088      


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 -0.579 0.579
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.706 0.000 0.000
y 0.000 -24.056 0.000
z 0.000 0.000 -27.788
Traceless
 xyz
x -5.784 0.000 0.000
y 0.000 5.692 0.000
z 0.000 0.000 0.092
Polar
3z2-r20.185
x2-y2-7.651
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.554 0.000 0.000
y 0.000 8.052 0.000
z 0.000 0.000 7.541


<r2> (average value of r2) Å2
<r2> 80.546
(<r2>)1/2 8.975