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: CCD/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 CCD/3-21G
 hartrees
Energy at 0K-152.894349
Energy at 298.15K 
HF Energy-152.586026
Nuclear repulsion energy73.322162
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 CCD/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' 3469 3373 4.37      
2 A' 3152 3065 7.97      
3 A' 3003 2920 42.84      
4 A' 1606 1562 1.97      
5 A' 1529 1487 0.45      
6 A' 1483 1442 4.70      
7 A' 1275 1240 58.07      
8 A' 1004 976 37.25      
9 A' 964 937 27.39      
10 A' 619 602 20.26      
11 A' 359 349 32.40      
12 A" 3257 3167 13.71      
13 A" 3030 2946 56.88      
14 A" 1332 1295 0.00      
15 A" 1181 1148 1.22      
16 A" 847 823 0.13      
17 A" 295 287 145.84      
18 A" 48i 47i 0.28      

Unscaled Zero Point Vibrational Energy (zpe) 14177.4 cm-1
Scaled (by 0.9723) Zero Point Vibrational Energy (zpe) 13784.6 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 CCD/3-21G
ABC
1.18906 0.31934 0.27973

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 -1.124 -0.407 0.000
C2 0.000 0.563 0.000
C3 1.284 -0.231 0.000
H4 -1.962 0.127 0.000
H5 -0.037 1.211 0.891
H6 -0.037 1.211 -0.891
H7 1.661 -0.644 -0.932
H8 1.661 -0.644 0.932

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8
O11.48462.41430.99422.14292.14292.94662.9466
C21.48461.50982.01031.10211.10212.25512.2551
C32.41431.50983.26612.14862.14861.08681.0868
H40.99422.01033.26612.38252.38253.82043.8204
H52.14291.10212.14862.38251.78253.10572.5147
H62.14291.10212.14862.38251.78252.51473.1057
H72.94662.25511.08683.82043.10572.51471.8637
H82.94662.25511.08683.82042.51473.10571.8637

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 107.462 O1 C2 H5 111.011
O1 C2 H6 111.011 C2 O1 H4 106.709
C2 C3 H7 119.681 C2 C3 H8 119.681
C3 C2 H5 109.713 C3 C2 H6 109.713
H5 C2 H6 107.929 H7 C3 H8 118.054
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (C1)

Jump to S1C1
Energy calculated at CCD/3-21G
 hartrees
Energy at 0K-152.895674
Energy at 298.15K-152.900250
HF Energy-152.587525
Nuclear repulsion energy73.651353
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 CCD/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 3505 3407 1.37      
2 A 3280 3189 6.03      
3 A 3164 3076 5.78      
4 A 2978 2895 56.18      
5 A 2940 2858 52.84      
6 A 1596 1552 2.12      
7 A 1498 1456 3.38      
8 A 1481 1440 2.30      
9 A 1298 1262 58.29      
10 A 1240 1206 2.19      
11 A 1099 1069 1.62      
12 A 1038 1010 39.66      
13 A 995 967 7.14      
14 A 876 852 13.11      
15 A 424 413 14.73      
16 A 373 363 66.03      
17 A 282 274 114.62      
18 A 130 127 21.08      

Unscaled Zero Point Vibrational Energy (zpe) 14097.9 cm-1
Scaled (by 0.9723) Zero Point Vibrational Energy (zpe) 13707.4 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 CCD/3-21G
ABC
1.25351 0.32862 0.27469

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
O1 -1.129 -0.383 -0.055
C2 0.001 0.545 0.034
C3 1.261 -0.271 -0.018
H4 -1.967 0.115 0.096
H5 -0.026 1.137 0.975
H6 0.008 1.284 -0.791
H7 2.218 0.201 -0.218
H8 1.226 -1.314 0.279

Atom - Atom Distances (Å)
  O1 C2 C3 H4 H5 H6 H7 H8
O11.46442.39230.98682.14142.14803.40152.5543
C21.46441.50172.01531.11231.10772.25772.2398
C32.39231.50173.25272.15022.14141.08641.0851
H40.98682.01533.25272.36272.46094.19803.5033
H52.14141.11232.15022.36271.77232.70822.8390
H62.14801.10772.14142.46091.77232.52693.0627
H73.40152.25771.08644.19802.70822.52691.8784
H82.55432.23981.08513.50332.83903.06271.8784

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 107.517 O1 C2 H5 111.689
O1 C2 H6 112.517 C2 O1 H4 109.049
C2 C3 H7 120.623 C2 C3 H8 119.093
C3 C2 H5 109.791 C3 C2 H6 109.371
H5 C2 H6 105.944 H7 C3 H8 119.772
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability