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

using model chemistry: HF/CEP-121G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/CEP-121G*
 hartrees
Energy at 0K-41.111666
Energy at 298.15K-41.119053
Nuclear repulsion energy94.330466
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 HF/CEP-121G*
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 3391 3063 15.16      
2 A1 3188 2880 18.63      
3 A1 1812 1637 0.07      
4 A1 1673 1511 0.43      
5 A1 1544 1395 19.54      
6 A1 1202 1086 0.71      
7 A1 1050 949 27.99      
8 A1 1007 909 15.30      
9 A1 800 723 8.07      
10 A2 3213 2903 0.00      
11 A2 1329 1200 0.00      
12 A2 1162 1050 0.00      
13 A2 1052 950 0.00      
14 A2 414 374 0.00      
15 B1 3217 2906 155.37      
16 B1 1296 1171 1.68      
17 B1 1134 1024 37.87      
18 B1 749 677 45.68      
19 B1 111 100 11.21      
20 B2 3365 3040 9.66      
21 B2 3182 2875 193.95      
22 B2 1661 1500 5.89      
23 B2 1505 1359 2.40      
24 B2 1441 1302 0.07      
25 B2 1261 1139 143.95      
26 B2 978 884 0.02      
27 B2 869 785 1.78      

Unscaled Zero Point Vibrational Energy (zpe) 21802.3 cm-1
Scaled (by 0.9034) Zero Point Vibrational Energy (zpe) 19696.2 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 HF/CEP-121G*
ABC
0.26994 0.26398 0.14042

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 0.000 0.000 1.178
C2 0.000 1.169 0.378
C3 0.000 0.661 -1.047
C4 0.000 -0.661 -1.047
C5 0.000 -1.169 0.378
H6 0.881 1.768 0.605
H7 -0.881 1.768 0.605
H8 -0.881 -1.768 0.605
H9 0.881 -1.768 0.605
H10 0.000 1.309 -1.907
H11 0.000 -1.309 -1.907

Atom - Atom Distances (Å)
  O1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11
O11.41622.32122.32121.41622.05672.05672.05672.05673.35053.3505
C21.41621.51382.31952.33791.08911.08913.07473.07472.28923.3704
C32.32121.51381.32102.31952.17572.17573.06683.06681.07622.1485
C42.32122.31951.32101.51383.06683.06682.17572.17572.14851.0762
C51.41622.33792.31951.51383.07473.07471.08911.08913.37042.2892
H62.05671.08912.17573.06683.07471.76163.95073.53622.70104.0683
H72.05671.08912.17573.06683.07471.76163.53623.95072.70104.0683
H82.05673.07473.06682.17571.08913.95073.53621.76164.06832.7010
H92.05673.07473.06682.17571.08913.53623.95071.76164.06832.7010
H103.35052.28921.07622.14853.37042.70102.70104.06834.06832.6174
H113.35053.37042.14851.07622.28924.06834.06832.70102.70102.6174

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 104.741 O1 C2 H6 109.666
O1 C2 H7 109.666 O1 C5 C4 104.741
O1 C5 H8 109.666 O1 C5 H9 109.666
C2 O1 C5 111.266 C2 C3 C4 109.626
C2 C3 H10 123.339 C3 C2 H6 112.388
C3 C2 H7 112.388 C3 C4 C5 109.626
C3 C4 H11 127.035 C4 C3 H10 127.035
C4 C5 H8 112.388 C4 C5 H9 112.388
C5 C4 H11 123.339 H6 C2 H7 107.945
H8 C5 H9 107.945
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 O -0.419      
2 C -0.097      
3 C -0.218      
4 C -0.218      
5 C -0.097      
6 H 0.147      
7 H 0.147      
8 H 0.147      
9 H 0.147      
10 H 0.231      
11 H 0.231      


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 -1.879 1.879
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.352 0.000 0.000
y 0.000 -25.553 0.000
z 0.000 0.000 -32.512
Traceless
 xyz
x -2.319 0.000 0.000
y 0.000 6.379 0.000
z 0.000 0.000 -4.060
Polar
3z2-r2-8.120
x2-y2-5.798
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.815 0.000 0.000
y 0.000 8.607 0.000
z 0.000 0.000 5.873


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