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 C4H6O (Furan, 2,5-dihydro-)

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-230.942715
Energy at 298.15K-230.949776
Nuclear repulsion energy173.453743
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 3170 3137 8.88      
2 A1 2892 2862 8.83      
3 A1 1643 1626 0.01      
4 A1 1475 1460 1.38      
5 A1 1346 1332 4.23      
6 A1 1083 1072 1.77      
7 A1 980 970 4.45      
8 A1 897 888 15.21      
9 A1 739 731 5.89      
10 A2 2899 2869 0.00      
11 A2 1185 1173 0.00      
12 A2 1018 1007 0.00      
13 A2 913 904 0.00      
14 A2 387 383 0.00      
15 B1 2901 2871 104.83      
16 B1 1128 1117 3.70      
17 B1 989 979 12.42      
18 B1 659 652 24.75      
19 B1 110 109 4.86      
20 B2 3145 3113 2.31      
21 B2 2883 2853 164.15      
22 B2 1460 1445 2.31      
23 B2 1326 1312 1.69      
24 B2 1277 1264 0.30      
25 B2 1085 1074 92.59      
26 B2 903 893 0.14      
27 B2 788 780 3.18      

Unscaled Zero Point Vibrational Energy (zpe) 19639.6 cm-1
Scaled (by 0.9897) Zero Point Vibrational Energy (zpe) 19437.3 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
0.26608 0.26192 0.13897

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 1.194
C2 0.000 1.170 0.370
C3 0.000 0.669 -1.046
C4 0.000 -0.669 -1.046
C5 0.000 -1.170 0.370
H6 0.892 1.795 0.598
H7 -0.892 1.795 0.598
H8 -0.892 -1.795 0.598
H9 0.892 -1.795 0.598
H10 0.000 1.328 -1.915
H11 0.000 -1.328 -1.915

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
O11.43082.33752.33751.43082.09072.09072.09072.09073.38053.3805
C21.43081.50282.32152.34071.11221.11223.10453.10452.29103.3862
C32.33751.50281.33772.32152.18312.18313.09313.09311.09072.1779
C42.33752.32151.33771.50283.09313.09312.18312.18312.17791.0907
C51.43082.34072.32151.50283.10453.10451.11221.11223.38622.2910
H62.09071.11222.18313.09313.10451.78394.00803.58912.70714.1064
H72.09071.11222.18313.09313.10451.78393.58914.00802.70714.1064
H82.09073.10453.09312.18311.11224.00803.58911.78394.10642.7071
H92.09073.10453.09312.18311.11223.58914.00801.78394.10642.7071
H103.38052.29101.09072.17793.38622.70712.70714.10644.10642.6563
H113.38053.38622.17791.09072.29104.10644.10642.70712.70712.6563

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 105.627 O1 C2 H6 109.962
O1 C2 H7 109.962 O1 C5 C4 105.627
O1 C5 H8 109.962 O1 C5 H9 109.962
C2 O1 C5 109.758 C2 C3 C4 109.494
C2 C3 H10 123.316 C3 C2 H6 112.339
C3 C2 H7 112.339 C3 C4 C5 109.494
C3 C4 H11 127.190 C4 C3 H10 127.190
C4 C5 H8 112.339 C4 C5 H9 112.339
C5 C4 H11 123.316 H6 C2 H7 106.641
H8 C5 H9 106.641
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 -0.226      
2 C -0.136      
3 C -0.088      
4 C -0.088      
5 C -0.136      
6 H 0.114      
7 H 0.114      
8 H 0.114      
9 H 0.114      
10 H 0.110      
11 H 0.110      


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 -1.470 1.470
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.531 0.000 0.000
y 0.000 -26.236 0.000
z 0.000 0.000 -31.223
Traceless
 xyz
x -1.801 0.000 0.000
y 0.000 4.642 0.000
z 0.000 0.000 -2.840
Polar
3z2-r2-5.681
x2-y2-4.295
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.852 0.000 0.000
y 0.000 8.884 0.000
z 0.000 0.000 6.389


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000