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: QCISD/3-21G*

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 QCISD/3-21G*
 hartrees
Energy at 0K-152.897730
Energy at 298.15K 
HF Energy-152.585618
Nuclear repulsion energy73.200217
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' 3431 3298 5.54      
2 A' 3134 3012 8.09      
3 A' 2988 2872 44.99      
4 A' 1601 1539 2.23      
5 A' 1522 1463 0.30      
6 A' 1472 1415 4.63      
7 A' 1268 1218 57.18      
8 A' 992 953 25.19      
9 A' 940 904 39.27      
10 A' 617 593 20.01      
11 A' 356 342 31.44      
12 A" 3239 3113 14.13      
13 A" 3014 2897 59.00      
14 A" 1324 1273 0.01      
15 A" 1175 1130 1.07      
16 A" 844 811 0.15      
17 A" 284 273 144.43      
18 A" 55i 53i 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 14073.0 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 13525.5 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 QCISD/3-21G*
ABC
1.18430 0.31842 0.27882

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 -1.125 -0.412 0.000
C2 0.000 0.565 0.000
C3 1.286 -0.227 0.000
H4 -1.965 0.125 0.000
H5 -0.039 1.212 0.892
H6 -0.039 1.212 -0.892
H7 1.666 -0.638 -0.933
H8 1.666 -0.638 0.933

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8
O11.49022.41780.99662.14792.14792.95142.9514
C21.49021.51002.01351.10281.10282.25632.2563
C32.41781.51003.26942.14992.14991.08771.0877
H40.99662.01353.26942.38462.38463.82533.8253
H52.14791.10282.14992.38461.78413.10772.5159
H62.14791.10282.14992.38461.78412.51593.1077
H72.95142.25631.08773.82533.10772.51591.8655
H82.95142.25631.08773.82532.51593.10771.8655

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 107.392 O1 C2 H5 110.977
O1 C2 H6 110.977 C2 O1 H4 106.432
C2 C3 H7 119.707 C2 C3 H8 119.707
C3 C2 H5 109.758 C3 C2 H6 109.758
H5 C2 H6 107.979 H7 C3 H8 118.091
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C1)

Jump to S1C1
Energy calculated at QCISD/3-21G*
 hartrees
Energy at 0K-152.899003
Energy at 298.15K-152.903565
HF Energy-152.587187
Nuclear repulsion energy73.557129
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 3471 3336 1.85      
2 A 3261 3135 6.32      
3 A 3146 3023 5.95      
4 A 2959 2844 57.67      
5 A 2917 2803 57.20      
6 A 1590 1528 2.62      
7 A 1490 1432 2.83      
8 A 1472 1414 2.73      
9 A 1291 1241 58.08      
10 A 1231 1183 2.41      
11 A 1092 1049 1.24      
12 A 1029 989 40.15      
13 A 987 949 7.06      
14 A 867 833 14.59      
15 A 423 406 16.13      
16 A 376 361 63.99      
17 A 281 270 112.05      
18 A 132 127 21.92      

Unscaled Zero Point Vibrational Energy (zpe) 14006.9 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 13462.0 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
1.24873 0.32796 0.27412

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 -1.130 -0.383 -0.055
C2 0.002 0.545 0.034
C3 1.261 -0.272 -0.017
H4 -1.969 0.117 0.099
H5 -0.024 1.138 0.976
H6 0.012 1.287 -0.791
H7 2.220 0.200 -0.218
H8 1.226 -1.316 0.279

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8
O11.46652.39450.98812.14442.15233.40442.5560
C21.46651.50202.01771.11351.10882.25862.2408
C32.39451.50203.25542.15092.14201.08731.0860
H40.98812.01773.25542.36492.46624.20143.5057
H52.14441.11352.15092.36491.77282.70952.8407
H62.15231.10882.14202.46621.77282.52633.0646
H73.40442.25861.08734.20142.70952.52631.8803
H82.55602.24081.08603.50572.84073.06461.8803

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 107.531 O1 C2 H5 111.711
O1 C2 H6 112.652 C2 O1 H4 109.015
C2 C3 H7 120.609 C2 C3 H8 119.089
C3 C2 H5 109.760 C3 C2 H6 109.339
H5 C2 H6 105.830 H7 C3 H8 119.806
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability