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: MP2/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-306.945502
Energy at 298.15K-306.956879
Nuclear repulsion energy266.081722
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 MP2/6-31G(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 A' 3196 3018 25.49      
2 A' 3187 3010 16.52      
3 A' 3174 2998 15.81      
4 A' 3115 2942 12.05      
5 A' 3048 2879 70.11      
6 A' 2995 2829 61.22      
7 A' 1542 1456 5.75      
8 A' 1525 1440 0.20      
9 A' 1488 1405 4.61      
10 A' 1429 1350 16.78      
11 A' 1341 1266 5.24      
12 A' 1231 1163 85.45      
13 A' 1207 1140 88.38      
14 A' 1132 1069 12.17      
15 A' 1026 969 31.98      
16 A' 942 890 8.01      
17 A' 867 819 9.08      
18 A' 651 615 4.37      
19 A' 487 460 1.24      
20 A' 455 430 9.00      
21 A' 271 256 1.83      
22 A" 3175 2999 28.75      
23 A" 3042 2873 16.46      
24 A" 1525 1440 3.71      
25 A" 1464 1382 11.18      
26 A" 1404 1326 1.65      
27 A" 1384 1307 0.22      
28 A" 1357 1281 1.33      
29 A" 1275 1204 32.83      
30 A" 1247 1178 0.00      
31 A" 1118 1056 60.97      
32 A" 1058 999 59.80      
33 A" 939 887 16.59      
34 A" 913 863 0.01      
35 A" 462 436 6.34      
36 A" 276 261 1.84      

Unscaled Zero Point Vibrational Energy (zpe) 27472.4 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 25947.6 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 MP2/6-31G(2df,p)
ABC
0.16885 0.16143 0.09308

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.632 -1.182 0.000
O2 0.016 -0.764 1.168
O3 0.016 -0.764 -1.168
C4 0.016 0.654 1.233
C5 0.016 0.654 -1.233
C6 0.700 1.233 0.000
H7 -0.618 -2.271 0.000
H8 -1.671 -0.806 0.000
H9 0.533 0.923 2.154
H10 -1.019 1.023 1.295
H11 0.533 0.923 -2.154
H12 -1.019 1.023 -1.295
H13 1.751 0.938 0.000
H14 0.640 2.324 0.000

Atom - Atom Distances (Å)
  C1 O2 O3 C4 C5 C6 H7 H8 H9 H10 H11 H12 H13 H14
C11.39981.39982.30492.30492.75791.08861.10463.22982.58673.22982.58673.18973.7304
O21.39982.33591.42002.78852.41232.00892.05232.02182.06963.76193.21452.69643.3606
O31.39982.33592.78851.42002.41232.00892.05233.76193.21452.02182.06962.69643.3606
C42.30491.42002.78852.46561.52373.23682.54901.09021.10063.43682.75622.14702.1677
C52.30492.78851.42002.46561.52373.23682.54903.43682.75621.09021.10062.14702.1677
C62.75792.41232.41231.52371.52373.74313.12662.18282.16202.18282.16201.09171.0934
H71.08862.00892.00893.23683.23683.74311.80384.02083.56204.02083.56203.98844.7643
H81.10462.05232.05232.54902.54903.12661.80383.53372.33413.53372.33413.84043.8909
H93.22982.02183.76191.09023.43682.18284.02083.53371.77654.30863.78342.47492.5721
H102.58672.06963.21451.10062.75622.16203.56202.33411.77653.78342.58973.05862.4741
H113.22983.76192.02183.43681.09022.18284.02083.53374.30863.78341.77652.47492.5721
H122.58673.21452.06962.75621.10062.16203.56202.33413.78342.58971.77653.05862.4741
H133.18972.69642.69642.14702.14701.09173.98843.84042.47493.05862.47493.05861.7767
H143.73043.36063.36062.16772.16771.09344.76433.89092.57212.47412.57212.47411.7767

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 109.652 C1 O3 C5 109.652
O2 C1 O3 113.106 O2 C1 H7 107.011
O2 C1 H8 109.504 O2 C4 C6 110.018
O2 C4 H9 106.568 O2 C4 H10 109.739
O3 C1 H7 107.011 O3 C1 H8 109.504
O3 C5 C6 110.018 O3 C5 H11 106.568
O3 C5 H12 109.739 C4 C6 C5 108.007
C4 C6 H13 109.234 C4 C6 H14 110.768
C5 C6 H13 109.234 C5 C6 H14 110.768
C6 C4 H9 112.182 C6 C4 H10 109.887
C6 C5 H11 112.182 C6 C5 H12 109.887
H7 C1 H8 110.658 H9 C4 H10 108.369
H11 C5 H12 108.369 H13 C6 H14 108.802
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability