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: CCSD(T)/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 CCSD(T)/6-31G**
 hartrees
Energy at 0K-2649.004581
Energy at 298.15K 
HF Energy-2648.547106
Nuclear repulsion energy163.184535
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 CCSD(T)/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' 3183 3019        
2 A' 3158 2995        
3 A' 3098 2938        
4 A' 1550 1470        
5 A' 1535 1456        
6 A' 1458 1383        
7 A' 1316 1248        
8 A' 1107 1050        
9 A' 1000 948        
10 A' 574 545        
11 A' 291 276        
12 A" 3232 3066        
13 A" 3200 3035        
14 A" 1537 1458        
15 A" 1300 1233        
16 A" 1057 1003        
17 A" 781 741        
18 A" 272 258        

Unscaled Zero Point Vibrational Energy (zpe) 14823.6 cm-1
Scaled (by 0.9485) Zero Point Vibrational Energy (zpe) 14060.2 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 CCSD(T)/6-31G**
ABC
0.99603 0.12505 0.11595

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.579 -2.035 0.000
C2 0.606 -1.084 0.000
Br3 0.000 0.798 0.000
H4 1.224 -1.189 0.889
H5 1.224 -1.189 -0.889
H6 -0.217 -3.067 0.000
H7 -1.197 -1.881 0.884
H8 -1.197 -1.881 -0.884

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51862.89092.18012.18011.09321.08991.0899
C21.51861.97691.08751.08752.14662.16032.1603
Br32.89091.97692.49682.49683.87033.06463.0646
H42.18011.08752.49681.77752.52822.51743.0792
H52.18011.08752.49681.77752.52823.07922.5174
H61.09322.14663.87032.52822.52821.77371.7737
H71.08992.16033.06462.51743.07921.77371.7688
H81.08992.16033.06463.07922.51741.77371.7688

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 110.909 C1 C2 H4 112.497
C1 C2 H5 112.497 C2 C1 H6 109.467
C2 C1 H7 110.748 C2 C1 H8 110.748
Br3 C2 H4 105.424 Br3 C2 H5 105.424
H4 C2 H5 109.624 H6 C1 H7 108.674
H6 C1 H8 108.674 H7 C1 H8 108.475
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability