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 C4H8O2 (1,4-Dioxane)

using model chemistry: HF/CEP-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2H 1Ag
Energy calculated at HF/CEP-31G*
 hartrees
Energy at 0K-57.977653
Energy at 298.15K-57.989170
Nuclear repulsion energy148.222091
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-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Ag 3304 2967 0.00      
2 Ag 3220 2891 0.00      
3 Ag 1648 1480 0.00      
4 Ag 1585 1424 0.00      
5 Ag 1444 1297 0.00      
6 Ag 1258 1130 0.00      
7 Ag 1121 1007 0.00      
8 Ag 918 824 0.00      
9 Ag 468 420 0.00      
10 Ag 441 396 0.00      
11 Au 3296 2960 173.62      
12 Au 3211 2884 84.59      
13 Au 1633 1466 0.04      
14 Au 1544 1387 59.03      
15 Au 1392 1250 95.81      
16 Au 1293 1161 206.65      
17 Au 1211 1087 4.74      
18 Au 969 870 26.39      
19 Au 263 236 1.38      
20 Bg 3301 2964 0.00      
21 Bg 3214 2886 0.00      
22 Bg 1623 1457 0.00      
23 Bg 1483 1332 0.00      
24 Bg 1345 1208 0.00      
25 Bg 1279 1149 0.00      
26 Bg 941 845 0.00      
27 Bg 522 469 0.00      
28 Bu 3306 2969 143.79      
29 Bu 3222 2893 234.26      
30 Bu 1639 1472 7.92      
31 Bu 1546 1388 22.28      
32 Bu 1433 1287 17.52      
33 Bu 1149 1032 13.03      
34 Bu 992 891 95.19      
35 Bu 659 592 19.16      
36 Bu 291 261 27.92      

Unscaled Zero Point Vibrational Energy (zpe) 29082.0 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 26115.6 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-31G*
ABC
0.17052 0.15695 0.09171

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G*

Point Group is C2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.766 1.166
C2 0.000 0.766 -1.166
C3 0.000 -0.766 1.166
C4 0.000 -0.766 -1.166
O5 -0.626 -1.258 0.000
O6 0.626 1.258 0.000
H7 -1.028 1.137 1.221
H8 -1.028 1.137 -1.221
H9 1.028 -1.137 -1.221
H10 1.028 -1.137 1.221
H11 0.558 1.152 -2.017
H12 0.558 1.152 2.017
H13 -0.558 -1.152 -2.017
H14 -0.558 -1.152 2.017

Atom - Atom Distances (Å)
  C1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13 H14
C12.33131.53242.78992.41831.41141.09422.62533.22122.16363.25381.08833.75722.1711
C22.33132.78991.53242.41831.41142.62531.09422.16363.22121.08833.25382.17113.7572
C31.53242.78992.33131.41142.41832.16363.22122.62531.09423.75722.17113.25381.0883
C42.78991.53242.33131.41142.41833.22122.16361.09422.62532.17113.75721.08833.2538
O52.41832.41831.41141.41142.81022.71842.71842.05942.05943.35793.35792.02062.0206
O61.41141.41142.41832.41832.81022.05942.05942.71842.71842.02062.02063.35793.3579
H71.09422.62532.16363.22122.71842.05942.44283.91973.06543.60581.77473.99272.4677
H82.62531.09423.22122.16362.71842.05942.44283.06543.91971.77473.60582.46773.9927
H93.22122.16362.62531.09422.05942.71843.91973.06542.44282.46773.99271.77473.6058
H102.16363.22121.09422.62532.05942.71843.06543.91972.44283.99272.46773.60581.7747
H113.25381.08833.75722.17113.35792.02063.60581.77472.46773.99274.03332.55964.7769
H121.08833.25382.17113.75723.35792.02061.77473.60583.99272.46774.03334.77692.5596
H133.75722.17113.25381.08832.02063.35793.99272.46771.77473.60582.55964.77694.0333
H142.17113.75721.08833.25382.02063.35792.46773.99273.60581.77474.77692.55964.0333

picture of 1,4-Dioxane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 O5 110.399 C1 C3 H10 109.793
C1 C3 H14 110.737 C1 O6 C2 111.357
C2 C4 O5 110.399 C2 C4 H9 109.793
C2 C4 H13 110.737 C3 C1 O6 110.399
C3 C1 H7 109.793 C3 C1 H12 110.737
C3 O5 C4 111.357 C4 C2 O6 110.399
C4 C2 H8 109.793 C4 C2 H11 110.737
O5 C3 H10 109.904 O5 C3 H14 107.157
O5 C4 H9 109.904 O5 C4 H13 107.157
O6 C1 H7 109.904 O6 C1 H12 107.157
O6 C2 H8 109.904 O6 C2 H11 107.157
H7 C1 H12 108.803 H8 C2 H11 108.803
H9 C4 H13 108.803 H10 C3 H14 108.803
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.067      
2 C -0.067      
3 C -0.067      
4 C -0.067      
5 O -0.372      
6 O -0.372      
7 H 0.091      
8 H 0.091      
9 H 0.091      
10 H 0.091      
11 H 0.162      
12 H 0.162      
13 H 0.162      
14 H 0.162      


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 0.000 0.000
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 5.663 -0.079 0.000
y -0.079 6.078 0.000
z 0.000 0.000 7.251


<r2> (average value of r2) Å2
<r2> 115.862
(<r2>)1/2 10.764