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All results from a given calculation for C3H8O2 (Propylene glycol)

using model chemistry: QCISD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at QCISD/3-21G
 hartrees
Energy at 0K-267.037374
Energy at 298.15K-267.047321
HF Energy-266.478104
Nuclear repulsion energy192.426606
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 QCISD/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 3459 3353 0.09      
2 A 3450 3344 19.03      
3 A 3117 3021 33.93      
4 A 3114 3018 14.43      
5 A 3103 3008 13.89      
6 A 3037 2944 30.12      
7 A 3033 2940 15.39      
8 A 2952 2861 59.44      
9 A 1580 1531 5.15      
10 A 1566 1517 3.20      
11 A 1561 1513 2.53      
12 A 1491 1445 53.39      
13 A 1473 1427 11.87      
14 A 1416 1372 20.30      
15 A 1412 1368 9.62      
16 A 1398 1355 42.53      
17 A 1350 1309 29.64      
18 A 1250 1211 15.62      
19 A 1175 1139 0.83      
20 A 1113 1079 16.93      
21 A 1057 1025 32.82      
22 A 999 969 47.17      
23 A 958 928 13.06      
24 A 919 891 16.86      
25 A 838 812 10.27      
26 A 636 617 179.67      
27 A 514 498 11.25      
28 A 466 452 21.06      
29 A 376 364 89.71      
30 A 359 348 9.20      
31 A 265 257 2.90      
32 A 224 217 0.39      
33 A 158 154 4.15      

Unscaled Zero Point Vibrational Energy (zpe) 24909.3 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 24142.1 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 QCISD/3-21G
ABC
0.28271 0.11846 0.09174

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 -0.348 1.391 -0.152
H2 0.638 1.532 -0.203
O3 1.945 -0.048 -0.019
H4 2.192 -0.138 0.941
C5 0.680 -0.803 -0.218
H6 0.557 -0.862 -1.305
H7 0.725 -1.816 0.209
C8 -0.476 0.027 0.377
H9 -0.386 0.018 1.480
C10 -1.857 -0.497 -0.042
H11 -1.924 -0.486 -1.139
H12 -2.021 -1.518 0.329
H13 -2.636 0.164 0.359

Atom - Atom Distances (Å)
  O1 H2 O3 H4 C5 H6 H7 C8 H9 C10 H11 H12 H13
O10.99792.71083.15992.42382.68793.40081.46842.13312.41912.64223.39002.6457
H20.99792.05892.55202.33552.63663.37431.96052.48493.22023.39344.08163.5928
O32.71082.05890.99551.48692.05992.16002.45442.77183.82914.05184.24434.6018
H43.15992.55200.99552.01822.87112.34592.73192.63764.18254.62474.47524.8723
C52.42382.33551.48692.01821.09551.10011.54242.16622.56192.77992.84733.5021
H62.68792.63662.05992.87111.09551.79752.16503.06922.74962.51533.12293.7445
H73.40083.37432.16002.34591.10011.79752.20602.49212.91093.25582.76493.9040
C81.46841.96052.45442.73191.54242.16502.20601.10691.53562.15792.18552.1645
H92.13312.48492.77182.63762.16623.06922.49211.10692.17903.07852.52122.5185
C102.41913.22023.82914.18252.56192.74962.91091.53562.17901.09831.09941.0973
H112.64223.39344.05184.62472.77992.51533.25582.15793.07851.09831.79691.7814
H123.39004.08164.24434.47522.84733.12292.76492.18552.52121.09941.79691.7915
H132.64573.59284.60184.87233.50213.74453.90402.16452.51851.09731.78141.7915

picture of Propylene glycol state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C8 C5 107.202 O1 C8 H9 111.070
O1 C8 C10 107.255 H2 O1 C8 103.645
O3 C5 H6 104.803 O3 C5 H7 112.358
O3 C5 C8 108.227 H4 O3 C5 107.121
C5 C8 H9 108.587 C5 C8 C10 112.676
H6 C5 H7 109.908 H6 C5 C8 109.141
H7 C5 C8 112.109 C8 C10 H11 108.894
C8 C10 H12 110.996 C8 C10 H13 109.469
H9 C8 C10 110.035 H11 C10 H12 109.700
H11 C10 H13 108.457 H12 C10 H13 109.281
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability