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 C2H5Br (Ethyl bromide)

using model chemistry: CID/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CID/3-21G
 hartrees
Energy at 0K-2638.502600
Energy at 298.15K 
HF Energy-2638.271318
Nuclear repulsion energy161.123214
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 CID/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' 3176 2959 22.64      
2 A' 3158 2942 3.63      
3 A' 3096 2884 13.96      
4 A' 1602 1493 3.64      
5 A' 1576 1468 4.81      
6 A' 1513 1409 5.92      
7 A' 1365 1272 50.76      
8 A' 1114 1037 3.05      
9 A' 1002 933 10.41      
10 A' 584 544 10.62      
11 A' 294 273 1.56      
12 A" 3235 3013 11.32      
13 A" 3178 2961 9.73      
14 A" 1593 1484 7.79      
15 A" 1349 1256 0.64      
16 A" 1092 1018 0.01      
17 A" 806 751 6.22      
18 A" 265 247 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 14998.3 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 13972.4 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 CID/3-21G
ABC
0.98561 0.12133 0.11263

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.583 -2.065 0.000
C2 0.611 -1.104 0.000
Br3 0.000 0.811 0.000
H4 1.225 -1.218 0.890
H5 1.225 -1.218 -0.890
H6 -0.217 -3.098 0.000
H7 -1.202 -1.912 0.887
H8 -1.202 -1.912 -0.887

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.53262.93402.18602.18601.09601.09261.0926
C21.53262.00921.08771.08772.15992.17362.1736
Br32.93402.00922.53142.53143.91503.10493.1049
H42.18601.08772.53141.78072.53182.52403.0870
H52.18601.08772.53141.78072.53183.08702.5240
H61.09602.15993.91502.53182.53181.77891.7789
H71.09262.17363.10492.52403.08701.77891.7742
H81.09262.17363.10493.08702.52401.77891.7742

picture of Ethyl bromide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 Br3 111.160 C1 C2 H4 111.958
C1 C2 H5 111.958 C2 C1 H6 109.390
C2 C1 H7 110.673 C2 C1 H8 110.673
Br3 C2 H4 105.768 Br3 C2 H5 105.768
H4 C2 H5 109.873 H6 C1 H7 108.743
H6 C1 H8 108.743 H7 C1 H8 108.571
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability