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 CH2CH2OH (2-hydroxy ethyl radical)

using model chemistry: G3

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no CS 2A'
1 2 yes C1 2A

Conformer 1 (CS)

Jump to S1C2
Energy calculated at G3
 hartrees
Energy at 0K-154.241154
Energy at 298.15K-154.235372
HF Energy-153.440971
Nuclear repulsion energy75.285880
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 HF/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 A' 4101 3864 34.76      
2 A' 3320 3128 12.60      
3 A' 3184 3000 78.20      
4 A' 1679 1582 2.64      
5 A' 1626 1532 7.35      
6 A' 1571 1480 10.01      
7 A' 1344 1267 108.30      
8 A' 1172 1104 118.18      
9 A' 1073 1011 2.62      
10 A' 648 610 12.40      
11 A' 398 375 34.83      
12 A" 3422 3225 22.78      
13 A" 3213 3027 85.55      
14 A" 1416 1334 0.96      
15 A" 1281 1207 2.58      
16 A" 868 818 1.15      
17 A" 302 284 154.92      
18 A" 80 75 0.14      

Unscaled Zero Point Vibrational Energy (zpe) 15348.7 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 14461.5 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=FULL/6-31G*
ABC
1.24129 0.33092 0.29118

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 -1.104 -0.377 0.000
C2 0.000 0.544 0.000
C3 1.259 -0.245 0.000
H4 -1.919 0.155 0.000
H5 -0.038 1.191 0.887
H6 -0.038 1.191 -0.887
H7 1.637 -0.658 -0.926
H8 1.637 -0.658 0.926

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8
O11.43812.36760.97282.09342.09342.90732.9073
C21.43811.48631.95761.09841.09842.23222.2322
C32.36761.48633.20322.12902.12901.08181.0818
H40.97281.95763.20322.32282.32283.76323.7632
H52.09341.09842.12902.32281.77393.08412.4954
H62.09341.09842.12902.32281.77392.49543.0841
H72.90732.23221.08183.76323.08412.49541.8516
H82.90732.23221.08183.76322.49543.08411.8516

picture of 2-hydroxy ethyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 109.010 O1 C2 H5 110.221
O1 C2 H6 110.221 C2 O1 H4 109.179
C2 C3 H7 119.718 C2 C3 H8 119.718
C3 C2 H5 109.871 C3 C2 H6 109.871
H5 C2 H6 107.637 H7 C3 H8 117.639
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C1)

Jump to S1C1
Energy calculated at G3
 hartrees
Energy at 0K-154.242732
Energy at 298.15K-154.247785
HF Energy-153.441817
Nuclear repulsion energy75.477990
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 HF/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 A 4116 3878 42.21      
2 A 3437 3238 14.31      
3 A 3328 3135 10.16      
4 A 3175 2991 87.66      
5 A 3123 2942 91.45      
6 A 1668 1571 3.94      
7 A 1620 1526 12.28      
8 A 1565 1475 3.96      
9 A 1393 1313 87.55      
10 A 1359 1280 28.09      
11 A 1224 1153 31.87      
12 A 1159 1092 50.58      
13 A 1057 996 7.33      
14 A 948 893 15.96      
15 A 482 454 17.73      
16 A 418 394 37.24      
17 A 303 285 137.11      
18 A 173 163 14.39      

Unscaled Zero Point Vibrational Energy (zpe) 15273.4 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 14390.6 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=FULL/6-31G*
ABC
1.32040 0.33681 0.28469

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 -1.104 -0.383 -0.056
C2 -0.010 0.528 0.040
C3 1.246 -0.258 -0.033
H4 -1.921 0.126 0.075
H5 -0.059 1.091 0.990
H6 -0.038 1.274 -0.769
H7 2.190 0.237 -0.214
H8 1.245 -1.280 0.319

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8
O11.42742.35330.97112.08802.09583.35592.5425
C21.42741.48251.95301.10511.10102.23322.2180
C32.35331.48253.19122.13732.12931.08161.0809
H40.97111.95303.19122.28772.36094.12213.4727
H52.08801.10512.13732.28771.76802.69002.7882
H62.09581.10102.12932.36091.76802.51873.0577
H73.35592.23321.08164.12212.69002.51871.8651
H82.54252.21801.08093.47272.78823.05771.8651

picture of 2-hydroxy ethyl radical state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
O1 C2 C3 108.346 O1 C2 H5 109.819
O1 C2 H6 110.324 C2 O1 H4 108.563
C2 C3 H7 120.133 C2 C3 H8 119.707
C3 C2 H5 111.007 C3 C2 H6 110.558
H5 C2 H6 106.791 H7 C3 H8 119.431
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability