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 C5H10O (2H-Pyran, tetrahydro-)

using model chemistry: MP2/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-271.215637
Energy at 298.15K-271.228564
HF Energy-270.121833
Nuclear repulsion energy261.189713
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/Def2TZVPP
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' 3149 2996 30.76      
2 A' 3138 2986 39.60      
3 A' 3126 2974 24.55      
4 A' 3077 2928 12.68      
5 A' 3065 2916 22.98      
6 A' 3014 2868 83.35      
7 A' 1518 1444 4.06      
8 A' 1499 1427 6.02      
9 A' 1488 1415 6.96      
10 A' 1426 1356 6.05      
11 A' 1385 1318 2.01      
12 A' 1338 1273 5.04      
13 A' 1293 1231 4.64      
14 A' 1185 1128 2.56      
15 A' 1063 1011 9.67      
16 A' 1036 986 8.22      
17 A' 905 861 21.23      
18 A' 871 828 4.64      
19 A' 842 802 3.01      
20 A' 562 534 3.82      
21 A' 431 410 1.10      
22 A' 413 393 4.36      
23 A' 253 241 3.69      
24 A" 3147 2994 34.02      
25 A" 3134 2982 29.24      
26 A" 3078 2928 27.85      
27 A" 3011 2865 21.17      
28 A" 1505 1432 0.99      
29 A" 1479 1407 2.46      
30 A" 1399 1331 4.57      
31 A" 1384 1317 0.74      
32 A" 1359 1293 0.01      
33 A" 1314 1250 6.96      
34 A" 1238 1178 39.43      
35 A" 1198 1140 0.11      
36 A" 1147 1091 61.56      
37 A" 1077 1024 17.34      
38 A" 987 939 2.96      
39 A" 906 862 0.70      
40 A" 825 785 0.55      
41 A" 459 437 0.02      
42 A" 245 233 0.38      

Unscaled Zero Point Vibrational Energy (zpe) 32481.8 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 30906.4 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/Def2TZVPP
ABC
0.15773 0.15122 0.08774

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 -0.680 -1.254 0.000
C2 0.638 1.310 0.000
H3 1.700 1.049 0.000
H4 0.577 2.398 0.000
C5 -0.020 0.728 1.246
C6 -0.020 0.728 -1.246
C7 -0.020 -0.789 -1.169
C8 -0.020 -0.789 1.169
H9 0.499 1.048 2.150
H10 0.499 1.048 -2.150
H11 -1.053 1.074 1.315
H12 -1.053 1.074 -1.315
H13 1.013 -1.161 -1.176
H14 1.013 -1.161 1.176
H15 -0.549 -1.232 -2.009
H16 -0.549 -1.232 2.009

Atom - Atom Distances (Å)
  O1 C2 H3 H4 C5 C6 C7 C8 H9 H10 H11 H12 H13 H14 H15 H16
O12.88253.31113.86192.43192.43191.41991.41993.36363.36362.69932.69932.06272.06272.01362.0136
C22.88251.09351.09001.52491.52492.49092.49092.17062.17062.15552.15552.76212.76213.45123.4512
H33.31111.09351.75592.14842.14842.77532.77532.46282.46283.05143.05142.59592.59593.78163.7816
H43.86191.09001.75592.16772.16773.44673.44672.54002.54002.47792.47793.77383.77384.29964.2996
C52.43191.52492.14842.16772.49222.85161.51891.09113.45091.09142.78323.24062.15433.83672.1692
C62.43191.52492.14842.16772.49221.51892.85163.45091.09112.78321.09142.15433.24062.16923.8367
C71.41992.49092.77533.44672.85161.51892.33703.82902.14723.27192.13501.09812.58871.08783.2519
C81.41992.49092.77533.44671.51892.85162.33702.14723.82902.13503.27192.58871.09813.25191.0878
H93.36362.17062.46282.54001.09113.45093.82902.14724.30061.76323.79754.02602.46904.85842.5144
H103.36362.17062.46282.54003.45091.09112.14723.82904.30063.79751.76322.46904.02602.51444.8584
H112.69932.15553.05142.47791.09142.78323.27192.13501.76323.79752.63033.93293.04684.07732.4606
H122.69932.15553.05142.47792.78321.09142.13503.27193.79751.76322.63033.04683.93292.46064.0773
H132.06272.76212.59593.77383.24062.15431.09812.58874.02602.46903.93293.04682.35151.77193.5481
H142.06272.76212.59593.77382.15433.24062.58871.09812.46904.02603.04683.93292.35153.54811.7719
H152.01363.45123.78164.29963.83672.16921.08783.25194.85842.51444.07732.46061.77193.54814.0186
H162.01363.45123.78164.29962.16923.83673.25191.08782.51444.85842.46064.07733.54811.77194.0186

picture of 2H-Pyran, tetrahydro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C7 C6 111.647 O1 C7 H13 109.347
O1 C7 H15 106.077 O1 C8 C5 111.647
O1 C8 H14 109.347 O1 C8 H16 106.077
C2 C5 C8 109.841 C2 C5 H9 111.061
C2 C5 H11 109.847 C2 C6 C7 109.841
C2 C6 H10 111.061 C2 C6 H12 109.847
H3 C2 H4 107.057 H3 C2 C5 109.161
H3 C2 C6 109.161 H4 C2 C5 110.895
H4 C2 C6 110.895 C5 C2 C6 109.610
C5 C8 H14 109.768 C5 C8 H16 111.572
C6 C7 H13 109.768 C6 C7 H15 111.572
C7 O1 C8 110.770 C7 C6 H10 109.615
C7 C6 H12 108.643 C8 C5 H9 109.615
C8 C5 H11 108.643 H9 C5 H11 107.777
H10 C6 H12 107.777 H13 C7 H15 108.307
H14 C8 H16 108.307
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability