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: PBEPBE/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at PBEPBE/6-311G*
 hartrees
Energy at 0K-2652.858697
Energy at 298.15K 
HF Energy-2652.858697
Nuclear repulsion energy162.483678
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 PBEPBE/6-311G*
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' 3043 3011 29.47      
2 A' 3026 2994 4.59      
3 A' 2968 2937 21.50      
4 A' 1469 1453 3.84      
5 A' 1449 1434 1.60      
6 A' 1373 1359 8.47      
7 A' 1244 1231 56.73      
8 A' 1061 1050 0.07      
9 A' 955 945 20.33      
10 A' 543 537 15.40      
11 A' 277 274 2.48      
12 A" 3094 3061 16.96      
13 A" 3060 3028 6.63      
14 A" 1451 1436 12.07      
15 A" 1235 1222 1.06      
16 A" 1009 999 0.36      
17 A" 755 747 6.22      
18 A" 259 256 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 14134.4 cm-1
Scaled (by 0.9896) Zero Point Vibrational Energy (zpe) 13987.4 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 PBEPBE/6-311G*
ABC
1.00115 0.12357 0.11480

See section I.F.4 to change rotational constant units
Geometric Data calculated at PBEPBE/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.574 -2.047 0.000
C2 0.599 -1.087 0.000
Br3 0.000 0.803 0.000
H4 1.227 -1.188 0.894
H5 1.227 -1.188 -0.894
H6 -0.197 -3.084 0.000
H7 -1.204 -1.914 0.891
H8 -1.204 -1.914 -0.891

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51522.90632.18562.18561.10381.09931.0993
C21.51521.98211.09681.09682.14982.17412.1741
Br32.90631.98212.50332.50333.89163.10163.1016
H42.18561.09682.50331.78742.53362.53643.1013
H52.18561.09682.50331.78742.53363.10132.5364
H61.10382.14983.89162.53362.53361.78271.7827
H71.09932.17413.10162.53643.10131.78271.7818
H81.09932.17413.10163.10132.53641.78271.7818

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 111.710 C1 C2 H4 112.612
C1 C2 H5 112.612 C2 C1 H6 109.330
C2 C1 H7 111.528 C2 C1 H8 111.528
Br3 C2 H4 105.125 Br3 C2 H5 105.125
H4 C2 H5 109.133 H6 C1 H7 108.026
H6 C1 H8 108.026 H7 C1 H8 108.276
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.631      
2 C -0.530      
3 Br -0.062      
4 H 0.262      
5 H 0.262      
6 H 0.224      
7 H 0.237      
8 H 0.237      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.468 -2.104 0.000 2.155
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.128 -1.036 0.000
y -1.036 -30.070 0.000
z 0.000 0.000 -32.399
Traceless
 xyz
x -0.893 -1.036 0.000
y -1.036 2.193 0.000
z 0.000 0.000 -1.300
Polar
3z2-r2-2.600
x2-y2-2.058
xy-1.036
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.046 -0.207 0.000
y -0.207 8.135 0.000
z 0.000 0.000 4.594


<r2> (average value of r2) Å2
<r2> 107.372
(<r2>)1/2 10.362