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: B2PLYP=FULLultrafine/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 B2PLYP=FULLultrafine/6-311G*
 hartrees
Energy at 0K-2652.947488
Energy at 298.15K 
HF Energy-2652.687212
Nuclear repulsion energy163.330587
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 B2PLYP=FULLultrafine/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' 3138 3138 33.14 62.90 0.44 0.61
2 A' 3124 3124 2.78 130.27 0.26 0.41
3 A' 3062 3062 21.79 157.35 0.07 0.13
4 A' 1534 1534 3.37 8.14 0.75 0.86
5 A' 1519 1519 1.64 11.84 0.72 0.84
6 A' 1445 1445 6.72 3.32 0.75 0.86
7 A' 1314 1314 61.50 3.95 0.65 0.79
8 A' 1099 1099 0.30 4.05 0.41 0.58
9 A' 991 991 15.59 5.00 0.74 0.85
10 A' 572 572 16.62 19.39 0.27 0.43
11 A' 290 290 2.04 2.44 0.49 0.66
12 A" 3192 3192 15.09 30.65 0.75 0.86
13 A" 3155 3155 9.32 88.97 0.75 0.86
14 A" 1520 1520 10.80 11.68 0.75 0.86
15 A" 1292 1292 0.89 3.57 0.75 0.86
16 A" 1061 1061 0.54 5.56 0.75 0.86
17 A" 788 788 5.04 0.25 0.75 0.86
18 A" 271 271 0.01 0.06 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14682.7 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 14682.7 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 B2PLYP=FULLultrafine/6-311G*
ABC
1.00836 0.12485 0.11592

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULLultrafine/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.573 -2.038 0.000
C2 0.599 -1.079 0.000
Br3 0.000 0.798 0.000
H4 1.220 -1.185 0.886
H5 1.220 -1.185 -0.886
H6 -0.200 -3.066 0.000
H7 -1.197 -1.901 0.884
H8 -1.197 -1.901 -0.884

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51472.89372.17452.17451.09391.08981.0898
C21.51471.97081.08691.08692.14182.16372.1637
Br32.89371.97082.49112.49113.86973.08223.0822
H42.17451.08692.49111.77232.51812.52033.0796
H52.17451.08692.49111.77232.51813.07962.5203
H61.09392.14183.86972.51812.51811.76941.7694
H71.08982.16373.08222.52033.07961.76941.7670
H81.08982.16373.08223.07962.52031.76941.7670

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 111.567 C1 C2 H4 112.358
C1 C2 H5 112.358 C2 C1 H6 109.317
C2 C1 H7 111.305 C2 C1 H8 111.305
Br3 C2 H4 105.436 Br3 C2 H5 105.436
H4 C2 H5 109.236 H6 C1 H7 108.245
H6 C1 H8 108.245 H7 C1 H8 108.323
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP=FULLultrafine/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.618      
2 C -0.496      
3 Br -0.077      
4 H 0.255      
5 H 0.255      
6 H 0.218      
7 H 0.231      
8 H 0.231      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.496 -2.140 0.000 2.197
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.254 -1.094 0.001
y -1.094 -30.355 0.023
z 0.001 0.023 -32.499
Traceless
 xyz
x -0.827 -1.094 0.001
y -1.094 2.022 0.023
z 0.001 0.023 -1.195
Polar
3z2-r2-2.390
x2-y2-1.899
xy-1.094
xz0.001
yz0.023


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.840 -0.286 -0.000
y -0.286 7.780 -0.001
z -0.000 -0.001 4.434


<r2> (average value of r2) Å2
<r2> 106.591
(<r2>)1/2 10.324