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/cc-pVDZ

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/cc-pVDZ
 hartrees
Energy at 0K-230.037009
Energy at 298.15K 
HF Energy-230.037009
Nuclear repulsion energy160.427337
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/cc-pVDZ
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 3287 3189 0.02 220.18 0.13 0.23
2 A1 3258 3160 0.58 32.50 0.28 0.44
3 A1 1517 1472 19.17 36.31 0.21 0.34
4 A1 1415 1373 2.11 13.34 0.46 0.63
5 A1 1159 1125 1.02 27.40 0.24 0.39
6 A1 1091 1058 12.38 6.90 0.28 0.44
7 A1 1005 975 40.77 1.18 0.31 0.47
8 A1 881 855 13.40 0.19 0.68 0.81
9 A2 885 859 0.00 1.03 0.75 0.86
10 A2 732 710 0.00 1.98 0.75 0.86
11 A2 615 596 0.00 0.03 0.75 0.86
12 B1 845 819 0.00 0.03 0.75 0.86
13 B1 756 734 80.13 1.07 0.75 0.86
14 B1 623 604 18.00 2.23 0.75 0.86
15 B2 3281 3182 0.88 15.65 0.75 0.86
16 B2 3247 3149 2.60 110.00 0.75 0.86
17 B2 1599 1551 0.41 0.34 0.75 0.86
18 B2 1270 1232 0.20 0.88 0.75 0.86
19 B2 1205 1168 16.95 0.82 0.75 0.86
20 B2 1052 1021 2.48 5.45 0.75 0.86
21 B2 887 860 0.32 3.42 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15305.1 cm-1
Scaled (by 0.97) Zero Point Vibrational Energy (zpe) 14846.0 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/cc-pVDZ
ABC
0.31481 0.30725 0.15549

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.162
C2 0.000 1.095 0.349
C3 0.000 -1.095 0.349
C4 0.000 0.719 -0.962
C5 0.000 -0.719 -0.962
H6 0.000 2.057 0.853
H7 0.000 -2.057 0.853
H8 0.000 1.380 -1.825
H9 0.000 -1.380 -1.825

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9
O11.36371.36372.24252.24252.07962.07963.29033.2903
C21.36372.19011.36432.23831.08573.19172.19273.2946
C31.36372.19012.23831.36433.19171.08573.29462.1927
C42.24251.36432.23831.43782.25523.31661.08702.2696
C52.24252.23831.36431.43783.31662.25522.26961.0870
H62.07961.08573.19172.25523.31664.11322.76224.3572
H72.07963.19171.08573.31662.25524.11324.35722.7622
H83.29032.19273.29461.08702.26962.76224.35722.7608
H93.29033.29462.19272.26961.08704.35722.76222.7608

picture of Furan state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C4 110.576 O1 C2 H6 115.751
O1 C3 C5 110.576 O1 C3 H7 115.751
C2 O1 C3 106.838 C2 C4 C5 106.005
C2 C4 H8 126.512 C3 C5 C4 106.005
C3 C5 H9 126.512 C4 C2 H6 133.673
C4 C5 H9 127.484 C5 C3 H7 133.673
C5 C4 H8 127.484
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.165      
2 C 0.122      
3 C 0.122      
4 C -0.015      
5 C -0.015      
6 H -0.002      
7 H -0.002      
8 H -0.023      
9 H -0.023      


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 -0.511 0.511
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.413 0.000 0.000
y 0.000 -24.220 0.000
z 0.000 0.000 -27.823
Traceless
 xyz
x -5.392 0.000 0.000
y 0.000 5.398 0.000
z 0.000 0.000 -0.006
Polar
3z2-r2-0.012
x2-y2-7.194
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.887 0.000 0.000
y 0.000 7.600 0.000
z 0.000 0.000 6.972


<r2> (average value of r2) Å2
<r2> 81.726
(<r2>)1/2 9.040