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All results from a given calculation for C2H5Br (Ethyl bromide)

using model chemistry: HSEh1PBE/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HSEh1PBE/3-21G
 hartrees
Energy at 0K-2640.169753
Energy at 298.15K 
HF Energy-2640.169753
Nuclear repulsion energy162.359556
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 HSEh1PBE/3-21G
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' 3151 3036 20.54 51.05 0.26 0.42
2 A' 3136 3021 0.56 122.39 0.32 0.49
3 A' 3069 2957 12.34 133.51 0.07 0.14
4 A' 1562 1505 5.62 18.07 0.74 0.85
5 A' 1531 1475 6.62 16.42 0.75 0.86
6 A' 1467 1413 12.25 6.98 0.66 0.79
7 A' 1321 1273 47.43 5.25 0.65 0.79
8 A' 1099 1059 2.64 6.32 0.60 0.75
9 A' 1008 971 20.56 4.59 0.74 0.85
10 A' 585 564 12.97 18.66 0.33 0.49
11 A' 292 282 2.31 3.27 0.56 0.72
12 A" 3212 3094 8.74 32.20 0.75 0.86
13 A" 3165 3049 5.50 79.85 0.75 0.86
14 A" 1549 1492 12.05 22.82 0.75 0.86
15 A" 1313 1265 1.21 8.09 0.75 0.86
16 A" 1066 1027 0.14 10.31 0.75 0.86
17 A" 795 766 9.66 1.36 0.75 0.86
18 A" 266 256 0.00 0.04 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 14794.0 cm-1
Scaled (by 0.9633) Zero Point Vibrational Energy (zpe) 14251.0 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 HSEh1PBE/3-21G
ABC
0.99066 0.12377 0.11481

See section I.F.4 to change rotational constant units
Geometric Data calculated at HSEh1PBE/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.579 -2.041 0.000
C2 0.608 -1.096 0.000
Br3 0.000 0.802 0.000
H4 1.224 -1.207 0.892
H5 1.224 -1.207 -0.892
H6 -0.220 -3.078 0.000
H7 -1.199 -1.887 0.888
H8 -1.199 -1.887 -0.888

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51732.90192.17802.17801.09781.09381.0938
C21.51731.99321.09021.09022.14822.16282.1628
Br32.90191.99322.51632.51633.88703.07533.0753
H42.17801.09022.51631.78472.52652.51663.0826
H52.17801.09022.51631.78472.52653.08262.5166
H61.09782.14823.88702.52652.52651.77981.7798
H71.09382.16283.07532.51663.08261.77981.7758
H81.09382.16283.07533.08262.51661.77981.7758

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 110.785 C1 C2 H4 112.262
C1 C2 H5 112.262 C2 C1 H6 109.416
C2 C1 H7 110.810 C2 C1 H8 110.810
Br3 C2 H4 105.623 Br3 C2 H5 105.623
H4 C2 H5 109.875 H6 C1 H7 108.602
H6 C1 H8 108.602 H7 C1 H8 108.542
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HSEh1PBE/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.620      
2 C -0.664      
3 Br 0.031      
4 H 0.275      
5 H 0.275      
6 H 0.228      
7 H 0.238      
8 H 0.238      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.453 -2.034 0.000 2.084
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -31.498 -0.846 0.000
y -0.846 -29.862 0.000
z 0.000 0.000 -31.851
Traceless
 xyz
x -0.641 -0.846 0.000
y -0.846 1.812 0.000
z 0.000 0.000 -1.171
Polar
3z2-r2-2.342
x2-y2-1.636
xy-0.846
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.690 -0.494 0.000
y -0.494 6.819 0.000
z 0.000 0.000 3.364


<r2> (average value of r2) Å2
<r2> 106.970
(<r2>)1/2 10.343