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: B3LYP/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/aug-cc-pVDZ
 hartrees
Energy at 0K-2653.394764
Energy at 298.15K 
HF Energy-2653.394764
Nuclear repulsion energy162.330255
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 B3LYP/aug-cc-pVDZ
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' 3109 3017 25.79      
2 A' 3097 3005 0.45      
3 A' 3031 2941 19.21      
4 A' 1469 1426 2.03      
5 A' 1456 1413 0.94      
6 A' 1387 1346 5.20      
7 A' 1254 1217 54.08      
8 A' 1074 1042 0.22      
9 A' 967 938 17.74      
10 A' 546 530 18.72      
11 A' 284 275 2.43      
12 A" 3170 3076 7.21      
13 A" 3128 3035 8.56      
14 A" 1453 1410 9.45      
15 A" 1248 1211 0.28      
16 A" 1020 989 0.06      
17 A" 765 742 3.40      
18 A" 250 243 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 14352.9 cm-1
Scaled (by 0.9704) Zero Point Vibrational Energy (zpe) 13928.1 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 B3LYP/aug-cc-pVDZ
ABC
1.00066 0.12326 0.11453

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.575 -2.049 0.000
C2 0.600 -1.091 0.000
Br3 0.000 0.804 0.000
H4 1.222 -1.189 0.895
H5 1.222 -1.189 -0.895
H6 -0.193 -3.082 0.000
H7 -1.201 -1.913 0.891
H8 -1.201 -1.913 -0.891

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51652.91012.18432.18431.10161.09721.0972
C21.51651.98721.09401.09402.14362.17122.1712
Br32.91011.98722.50282.50283.89063.10113.1011
H42.18431.09402.50281.78912.52752.52913.0959
H52.18431.09402.50281.78912.52753.09592.5291
H61.10162.14363.89062.52752.52751.78221.7822
H71.09722.17123.10112.52913.09591.78221.7821
H81.09722.17123.10113.09592.52911.78221.7821

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 111.610 C1 C2 H4 112.587
C1 C2 H5 112.587 C2 C1 H6 108.892
C2 C1 H7 111.328 C2 C1 H8 111.328
Br3 C2 H4 104.906 Br3 C2 H5 104.906
H4 C2 H5 109.704 H6 C1 H7 108.296
H6 C1 H8 108.296 H7 C1 H8 108.607
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.851      
2 C 0.237      
3 Br 0.123      
4 H -0.257      
5 H -0.257      
6 H -0.241      
7 H -0.229      
8 H -0.229      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.475 -2.233 0.000 2.283
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.315 -0.999 0.000
y -0.999 -30.411 0.000
z 0.000 0.000 -32.592
Traceless
 xyz
x -0.813 -0.999 0.000
y -0.999 2.042 0.000
z 0.000 0.000 -1.230
Polar
3z2-r2-2.459
x2-y2-1.904
xy-0.999
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.644 -0.077 0.000
y -0.077 9.312 0.000
z 0.000 0.000 6.226


<r2> (average value of r2) Å2
<r2> 107.668
(<r2>)1/2 10.376