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All results from a given calculation for C4H6O (Furan, 2,5-dihydro-)

using model chemistry: G4

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at G4
 hartrees
Energy at 0K-231.078361
Energy at 298.15K-231.072896
HF Energy-231.234800
Nuclear repulsion energy174.163301
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/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 3233 3120 9.45      
2 A1 2971 2867 10.13      
3 A1 1693 1634 0.02      
4 A1 1529 1476 0.83      
5 A1 1397 1348 6.32      
6 A1 1121 1082 1.36      
7 A1 993 958 6.20      
8 A1 919 887 16.17      
9 A1 758 731 6.35      
10 A2 2980 2876 0.00      
11 A2 1225 1182 0.00      
12 A2 1060 1023 0.00      
13 A2 958 924 0.00      
14 A2 400 386 0.00      
15 B1 2983 2878 107.30      
16 B1 1175 1134 2.23      
17 B1 1033 996 15.84      
18 B1 689 665 23.73      
19 B1 123 118 5.79      
20 B2 3208 3096 2.74      
21 B2 2963 2860 157.17      
22 B2 1516 1463 3.03      
23 B2 1371 1323 2.75      
24 B2 1329 1282 0.11      
25 B2 1120 1081 100.62      
26 B2 920 888 0.07      
27 B2 813 785 3.42      

Unscaled Zero Point Vibrational Energy (zpe) 20238.2 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 19529.9 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/6-31G(2df,p)
ABC
0.26810 0.26381 0.13995

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.187
C2 0.000 1.169 0.371
C3 0.000 0.664 -1.044
C4 0.000 -0.664 -1.044
C5 0.000 -1.169 0.371
H6 0.886 1.785 0.598
H7 -0.886 1.785 0.598
H8 -0.886 -1.785 0.598
H9 0.886 -1.785 0.598
H10 0.000 1.318 -1.906
H11 0.000 -1.318 -1.906

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
O11.42522.32752.32751.42522.07742.07742.07742.07743.36223.3622
C21.42521.50302.31582.33801.10231.10233.09193.09192.28253.3727
C32.32751.50301.32762.31582.17682.17683.07853.07851.08252.1616
C42.32752.31581.32761.50303.07853.07852.17682.17682.16161.0825
C51.42522.33802.31581.50303.09193.09191.10231.10233.37272.2825
H62.07741.10232.17683.07853.09191.77143.98473.56932.69724.0849
H72.07741.10232.17683.07853.09191.77143.56933.98472.69724.0849
H82.07743.09193.07852.17681.10233.98473.56931.77144.08492.6972
H92.07743.09193.07852.17681.10233.56933.98471.77144.08492.6972
H103.36222.28251.08252.16163.37272.69722.69724.08494.08492.6369
H113.36223.37272.16161.08252.28254.08494.08492.69722.69722.6369

picture of Furan, 2,5-dihydro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 105.140 O1 C2 H6 110.231
O1 C2 H7 110.231 O1 C5 C4 105.140
O1 C5 H8 110.231 O1 C5 H9 110.231
C2 O1 C5 110.595 C2 C3 C4 109.563
C2 C3 H10 123.247 C3 C2 H6 112.125
C3 C2 H7 112.125 C3 C4 C5 109.563
C3 C4 H11 127.190 C4 C3 H10 127.190
C4 C5 H8 112.125 C4 C5 H9 112.125
C5 C4 H11 123.247 H6 C2 H7 107.028
H8 C5 H9 107.028
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/6-31G(2df,p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.261      
2 C -0.100      
3 C -0.081      
4 C -0.081      
5 C -0.100      
6 H 0.104      
7 H 0.104      
8 H 0.104      
9 H 0.104      
10 H 0.104      
11 H 0.104      


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 -1.570 1.570
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


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


<r2> (average value of r2) Å2
<r2> 94.084
(<r2>)1/2 9.700