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 CH2CH2Cl (2-chloroethyl radical)

using model chemistry: MP2/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 2A'
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-535.092786
Energy at 298.15K-535.096467
HF Energy-534.885513
Nuclear repulsion energy91.130151
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 MP2/3-21G
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' 3214 3068 2.34      
2 A' 3181 3037 6.16      
3 A' 1581 1509 2.10      
4 A' 1556 1485 4.24      
5 A' 1278 1220 18.69      
6 A' 1077 1028 13.51      
7 A' 681 650 97.48      
8 A' 542 518 63.39      
9 A' 306 292 12.97      
10 A" 3328 3176 3.98      
11 A" 3256 3108 0.74      
12 A" 1322 1262 0.06      
13 A" 1083 1033 0.28      
14 A" 819 782 3.44      
15 A" 280 267 1.15      

Unscaled Zero Point Vibrational Energy (zpe) 11752.0 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 11217.3 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 MP2/3-21G
ABC
1.04224 0.17732 0.16133

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.466 0.897 0.000
C2 0.000 0.945 0.000
Cl3 0.702 -0.900 0.000
H4 -2.004 0.762 0.929
H5 -2.004 0.762 -0.929
H6 0.438 1.365 -0.901
H7 0.438 1.365 0.901

Atom - Atom Distances (Å)
  C1 C2 Cl3 H4 H5 H6 H7
C11.46682.81581.08221.08222.15822.1582
C21.46681.97412.21652.21651.08681.0868
Cl32.81581.97413.30873.30872.45252.4525
H41.08222.21653.30871.85843.11112.5158
H51.08222.21653.30871.85842.51583.1111
H62.15821.08682.45253.11112.51581.8024
H72.15821.08682.45252.51583.11111.8024

picture of 2-chloroethyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Cl3 108.948 C1 C2 H6 114.559
C1 C2 H7 114.559 C2 C1 H4 120.064
C2 C1 H5 120.064 Cl3 C2 H6 102.614
Cl3 C2 H7 102.614 H4 C1 H5 118.334
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability