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: CCD/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCD/6-31G**
 hartrees
Energy at 0K-2648.990279
Energy at 298.15K 
HF Energy-2648.547242
Nuclear repulsion energy163.699542
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/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' 3208 3008 21.38      
2 A' 3182 2984 9.49      
3 A' 3122 2927 17.83      
4 A' 1561 1463 1.52      
5 A' 1549 1452 0.86      
6 A' 1474 1382 2.68      
7 A' 1337 1254 57.55      
8 A' 1120 1050 0.09      
9 A' 1013 949 8.83      
10 A' 593 556 12.50      
11 A' 296 277 1.65      
12 A" 3256 3053 13.20      
13 A" 3224 3023 7.16      
14 A" 1549 1452 6.27      
15 A" 1314 1232 0.30      
16 A" 1073 1006 0.22      
17 A" 790 741 2.61      
18 A" 273 256 0.03      

Unscaled Zero Point Vibrational Energy (zpe) 14966.5 cm-1
Scaled (by 0.9376) Zero Point Vibrational Energy (zpe) 14032.6 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/6-31G**
ABC
1.00211 0.12581 0.11666

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.577 -2.030 0.000
C2 0.603 -1.077 0.000
Br3 0.000 0.795 0.000
H4 1.221 -1.184 0.887
H5 1.221 -1.184 -0.887
H6 -0.213 -3.059 0.000
H7 -1.195 -1.880 0.883
H8 -1.195 -1.880 -0.883

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51662.88342.17572.17571.09151.08831.0883
C21.51661.96701.08581.08582.14382.15822.1582
Br32.88341.96702.48852.48853.86033.06013.0601
H42.17571.08582.48851.77322.52212.51433.0746
H52.17571.08582.48851.77322.52213.07462.5143
H61.09152.14383.86032.52212.52211.77031.7703
H71.08832.15823.06012.51433.07461.77031.7659
H81.08832.15823.06013.07462.51431.77031.7659

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 111.065 C1 C2 H4 112.387
C1 C2 H5 112.387 C2 C1 H6 109.482
C2 C1 H7 110.819 C2 C1 H8 110.819
Br3 C2 H4 105.542 Br3 C2 H5 105.542
H4 C2 H5 109.480 H6 C1 H7 108.607
H6 C1 H8 108.607 H7 C1 H8 108.447
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability