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 (1,3-Dioxane)

using model chemistry: HF/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/3-21G
 hartrees
Energy at 0K-304.140521
Energy at 298.15K-304.151982
Nuclear repulsion energy263.125299
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/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3342 3027 37.09      
2 A' 3302 2990 25.09      
3 A' 3282 2973 22.20      
4 A' 3231 2926 16.41      
5 A' 3184 2884 122.15      
6 A' 3165 2866 45.60      
7 A' 1697 1537 8.69      
8 A' 1677 1519 2.24      
9 A' 1630 1477 4.67      
10 A' 1536 1391 21.47      
11 A' 1432 1297 3.22      
12 A' 1301 1178 40.59      
13 A' 1267 1147 160.28      
14 A' 1195 1082 23.84      
15 A' 1076 975 55.13      
16 A' 946 857 8.15      
17 A' 879 796 8.95      
18 A' 681 617 9.84      
19 A' 518 469 1.58      
20 A' 415 375 19.64      
21 A' 267 242 4.46      
22 A" 3298 2987 41.15      
23 A" 3175 2876 20.85      
24 A" 1672 1514 1.16      
25 A" 1584 1434 9.39      
26 A" 1516 1373 5.01      
27 A" 1515 1372 0.76      
28 A" 1438 1303 0.57      
29 A" 1379 1249 26.61      
30 A" 1343 1216 8.03      
31 A" 1169 1059 81.40      
32 A" 1098 994 29.23      
33 A" 1005 911 18.10      
34 A" 940 851 7.78      
35 A" 476 431 13.43      
36 A" 249 225 3.07      

Unscaled Zero Point Vibrational Energy (zpe) 28941.0 cm-1
Scaled (by 0.9056) Zero Point Vibrational Energy (zpe) 26209.0 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 HF/3-21G
ABC
0.16273 0.15940 0.09010

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.606 -1.259 0.000
O2 0.007 -0.759 1.179
O3 0.007 -0.759 -1.179
C4 0.007 0.684 1.247
C5 0.007 0.684 -1.247
C6 0.694 1.256 0.000
H7 -0.476 -2.325 0.000
H8 -1.660 -0.998 0.000
H9 0.530 0.945 2.153
H10 -1.015 1.049 1.308
H11 0.530 0.945 -2.153
H12 -1.015 1.049 -1.308
H13 1.731 0.948 0.000
H14 0.641 2.338 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.42041.42042.38962.38962.83121.07341.08663.28452.68503.28452.68503.21423.8073
O21.42042.35881.44482.82342.43332.01932.05652.03132.08123.77933.24072.69693.3738
O31.42042.35882.82341.44482.43332.01932.05653.77933.24072.03132.08122.69693.3738
C42.38961.44482.82342.49451.53423.29332.67691.07801.08723.45022.77632.14382.1660
C52.38962.82341.44482.49451.53423.29332.67693.45022.77631.07801.08722.14382.1660
C62.83122.43332.43331.53421.53423.76713.25902.18142.16192.18142.16191.08181.0833
H71.07342.01932.01933.29333.29333.76711.77904.04283.65904.04283.65903.94724.7948
H81.08662.05652.05652.67692.67693.25901.77903.63462.51363.63462.51363.90964.0526
H93.28452.03133.77931.07803.45022.18144.04283.63461.76424.30603.79182.46512.5664
H102.68502.08123.24071.08722.77632.16193.65902.51361.76423.79182.61623.04322.4727
H113.28453.77932.03133.45021.07802.18144.04283.63464.30603.79181.76422.46512.5664
H122.68503.24072.08122.77631.08722.16193.65902.51363.79182.61621.76423.04322.4727
H133.21422.69692.69692.14382.14381.08183.94723.90962.46513.04322.46513.04321.7663
H143.80733.37383.37382.16602.16601.08334.79484.05262.56642.47272.56642.47271.7663

picture of 1,3-Dioxane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O2 C4 113.020 C1 O3 C5 113.020
O2 C1 O3 112.267 O2 C1 H7 107.318
O2 C1 H8 109.512 O2 C4 C6 109.505
O2 C4 H9 106.345 O2 C4 H10 109.759
O3 C1 H7 107.318 O3 C1 H8 109.512
O3 C5 C6 109.505 O3 C5 H11 106.345
O3 C5 H12 109.759 C4 C6 C5 108.779
C4 C6 H13 108.836 C4 C6 H14 110.507
C5 C6 H13 108.836 C5 C6 H14 110.507
C6 C4 H9 112.068 C6 C4 H10 109.951
C6 C5 H11 112.068 C6 C5 H12 109.951
H7 C1 H8 110.887 H9 C4 H10 109.138
H11 C5 H12 109.138 H13 C6 H14 109.335
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.251      
2 O -0.658      
3 O -0.658      
4 C -0.082      
5 C -0.082      
6 C -0.494      
7 H 0.239      
8 H 0.175      
9 H 0.235      
10 H 0.190      
11 H 0.235      
12 H 0.190      
13 H 0.248      
14 H 0.210      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.052 2.425 0.000 2.643
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -35.868 2.056 0.000
y 2.056 -34.702 0.000
z 0.000 0.000 -40.058
Traceless
 xyz
x 1.513 2.056 0.000
y 2.056 3.260 0.000
z 0.000 0.000 -4.773
Polar
3z2-r2-9.545
x2-y2-1.165
xy2.056
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.639 0.383 0.000
y 0.383 6.665 0.000
z 0.000 0.000 6.024


<r2> (average value of r2) Å2
<r2> 141.323
(<r2>)1/2 11.888