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-Dioxolane, 2-methyl-)

using model chemistry: MP2/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/6-311G**
 hartrees
Energy at 0K-306.893888
Energy at 298.15K-306.904446
HF Energy-305.913995
Nuclear repulsion energy263.485521
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 MP2/6-311G**
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 3200 3041 13.92      
2 A 3194 3035 11.44      
3 A 3181 3023 28.93      
4 A 3146 2989 29.55      
5 A 3094 2940 6.87      
6 A 3090 2936 60.02      
7 A 3058 2906 50.43      
8 A 2993 2844 91.08      
9 A 1554 1476 0.52      
10 A 1536 1459 4.59      
11 A 1508 1433 4.55      
12 A 1506 1431 5.93      
13 A 1474 1400 73.63      
14 A 1422 1351 11.84      
15 A 1409 1339 1.38      
16 A 1402 1332 1.58      
17 A 1368 1300 0.20      
18 A 1275 1211 19.91      
19 A 1248 1186 1.60      
20 A 1205 1145 71.97      
21 A 1183 1124 23.29      
22 A 1156 1098 73.87      
23 A 1134 1077 40.37      
24 A 1099 1044 23.12      
25 A 1072 1019 54.60      
26 A 974 926 13.21      
27 A 905 860 43.73      
28 A 894 849 9.08      
29 A 869 826 9.27      
30 A 707 672 2.28      
31 A 691 656 3.37      
32 A 524 498 4.70      
33 A 336 319 5.29      
34 A 236 224 0.93      
35 A 218 207 4.30      
36 A 65 61 3.56      

Unscaled Zero Point Vibrational Energy (zpe) 26961.9 cm-1
Scaled (by 0.9502) Zero Point Vibrational Energy (zpe) 25619.2 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 MP2/6-311G**
ABC
0.23501 0.11532 0.08528

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G**

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.082 0.012 -0.160
H2 -2.622 -0.899 0.110
H3 -2.605 0.877 0.253
H4 -2.032 0.101 -1.246
C5 -0.679 -0.041 0.384
H6 -0.666 -0.149 1.483
O7 0.024 1.141 0.029
O8 0.031 -1.110 -0.193
C9 1.384 -0.762 0.058
H10 2.017 -1.304 -0.644
H11 1.659 -1.025 1.088
C12 1.391 0.763 -0.144
H13 1.702 1.039 -1.155
H14 2.027 1.273 0.587

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 H6 O7 O8 C9 H10 H11 C12 H13 H14
C11.09231.09191.09151.50542.17512.39712.39193.55734.33224.07783.55324.04514.3622
H21.09231.78191.78502.14152.50553.34192.67804.00814.71724.39354.35084.90395.1531
H31.09191.78191.78212.13722.51532.65143.33024.31615.18864.74324.01664.53354.6600
H41.09151.78501.78212.12363.06302.63382.61373.75694.32864.51083.65683.85124.6054
C51.50542.14152.13722.12361.10461.42011.40672.20913.14992.63302.28263.03373.0147
H62.17512.50552.51533.06301.10462.06232.05392.57023.61342.51582.77643.73853.1738
O72.39713.34192.65142.63381.42012.06232.26132.33823.22512.91311.42832.05602.0828
O82.39192.67803.33022.61371.40672.05392.26131.41932.04632.07412.31532.88693.2047
C93.55734.00814.31613.75692.20912.57022.33821.41931.09011.09861.53832.19422.1986
H104.33224.71725.18864.32863.14993.61343.22512.04631.09011.79062.21742.41882.8562
H114.07784.39354.74324.51082.63302.51582.91312.07411.09861.79062.18843.04882.3809
C123.55324.35084.01663.65682.28262.77641.42832.31531.53832.21742.18841.09321.0946
H134.04514.90394.53353.85123.03373.73852.05602.88692.19422.41883.04881.09321.7875
H144.36225.15314.66004.60543.01473.17382.08283.20472.19862.85622.38091.09461.7875

picture of 1,3-Dioxolane, 2-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C5 H6 111.974 C1 C5 O7 110.011
C1 C5 O8 110.391 H2 C1 H3 109.339
H2 C1 H4 109.648 H2 C1 C5 110.035
H3 C1 H4 109.416 H3 C1 C5 109.715
H4 C1 C5 108.672 C5 O7 C12 106.520
C5 O8 C9 102.827 H6 C5 O7 108.896
H6 C5 O8 109.148 O7 C5 O8 106.244
O7 C12 C9 103.971 O7 C12 H13 108.521
O7 C12 H14 110.596 O8 C9 H10 108.546
O8 C9 H11 110.264 O8 C9 C12 102.966
C9 C12 H13 111.873 C9 C12 H14 112.141
H10 C9 H11 109.790 H10 C9 C12 113.958
H11 C9 C12 111.080 H13 C12 H14 109.572
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability