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 C3H6O3 (1,3,5-Trioxane)

using model chemistry: MP2/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A1
Energy calculated at MP2/6-31G**
 hartrees
Energy at 0K-342.613388
Energy at 298.15K 
HF Energy-341.660488
Nuclear repulsion energy270.387363
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**
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 3254 3047 12.89      
2 A1 3050 2857 168.58      
3 A1 1582 1481 3.82      
4 A1 1270 1189 22.12      
5 A1 1007 943 80.27      
6 A1 763 714 0.96      
7 A1 483 452 20.24      
8 A2 1426 1335 0.00      
9 A2 1275 1194 0.00      
10 A2 1017 953 0.00      
11 E 3251 3044 30.86      
11 E 3251 3044 30.86      
12 E 3036 2843 21.77      
12 E 3036 2843 21.77      
13 E 1562 1463 0.01      
13 E 1562 1463 0.01      
14 E 1481 1387 38.70      
14 E 1481 1387 38.70      
15 E 1359 1273 1.37      
15 E 1359 1273 1.37      
16 E 1221 1143 227.73      
16 E 1221 1143 227.73      
17 E 1110 1040 54.05      
17 E 1110 1040 54.05      
18 E 984 922 36.92      
18 E 984 922 36.92      
19 E 529 495 9.87      
19 E 529 495 9.87      
20 E 307 288 0.12      
20 E 307 288 0.12      

Unscaled Zero Point Vibrational Energy (zpe) 22401.1 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 20978.6 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**
ABC
0.17561 0.17561 0.09779

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G**

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 1.325 0.185
C2 -1.147 -0.662 0.185
C3 1.147 -0.662 0.185
O4 -1.168 0.674 -0.271
O5 1.168 0.674 -0.271
O6 0.000 -1.349 -0.271
H7 0.000 2.327 -0.230
H8 0.000 1.352 1.286
H9 -2.015 -1.163 -0.230
H10 -1.171 -0.676 1.286
H11 2.015 -1.163 -0.230
H12 1.171 -0.676 1.286

Atom - Atom Distances (Å)
  C1 C2 C3 O4 O5 O6 H7 H8 H9 H10 H11 H12
C12.29442.29441.41251.41252.71221.08471.10123.22852.56643.22852.5664
C22.29442.29441.41252.71221.41253.22852.56641.08471.10123.22852.5664
C32.29442.29442.71221.41251.41253.22852.56643.22852.56641.08471.1012
O41.41251.41252.71222.33642.33642.02402.06092.02402.06093.67593.1176
O51.41252.71221.41252.33642.33642.02402.06093.67593.11762.02402.0609
O62.71221.41251.41252.33642.33643.67593.11762.02402.06092.02402.0609
H71.08473.22853.22852.02402.02403.67591.80214.03013.56194.03013.5619
H81.10122.56642.56642.06092.06093.11761.80213.56192.34223.56192.3422
H93.22851.08473.22852.02403.67592.02404.03013.56191.80214.03013.5619
H102.56641.10122.56642.06093.11762.06093.56192.34221.80213.56192.3422
H113.22853.22851.08473.67592.02402.02404.03013.56194.03013.56191.8021
H122.56642.56641.10123.11762.06092.06093.56192.34223.56192.34221.8021

picture of 1,3,5-Trioxane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O4 C2 108.615 C1 O5 C3 108.615
C2 O6 C3 108.615 O4 C1 O5 111.587
O4 C1 H7 107.565 O4 C1 H8 109.520
O4 C2 O6 111.587 O4 C2 H9 107.565
O4 C2 H10 109.520 O5 C1 H7 107.565
O5 C1 H8 109.520 O5 C3 O6 111.587
O5 C3 H11 107.565 O5 C3 H12 109.520
O6 C2 H9 107.565 O6 C2 H10 109.520
O6 C3 H11 107.565 O6 C3 H12 109.520
H7 C1 H8 111.064 H9 C2 H10 111.064
H11 C3 H12 111.064
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability