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

using model chemistry: HF/cc-pVQZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/cc-pVQZ
 hartrees
Energy at 0K-2651.150983
Energy at 298.15K 
HF Energy-2651.150983
Nuclear repulsion energy164.268260
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 HF/cc-pVQZ
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' 3249 2952 32.39 96.08 0.05 0.09
2 A' 3223 2928 9.11 94.26 0.51 0.67
3 A' 3161 2872 27.89 176.83 0.07 0.13
4 A' 1615 1467 1.80 2.13 0.75 0.85
5 A' 1611 1464 1.49 7.86 0.70 0.82
6 A' 1539 1398 2.74 0.83 0.74 0.85
7 A' 1398 1270 71.99 6.34 0.41 0.58
8 A' 1158 1052 0.66 4.66 0.12 0.21
9 A' 1038 943 13.92 4.33 0.72 0.84
10 A' 603 547 28.53 26.86 0.23 0.38
11 A' 307 279 2.35 2.93 0.30 0.46
12 A" 3309 3006 10.00 38.85 0.75 0.86
13 A" 3247 2950 15.69 62.85 0.75 0.86
14 A" 1603 1456 8.33 6.05 0.75 0.86
15 A" 1372 1246 0.16 1.23 0.75 0.86
16 A" 1128 1025 0.15 1.30 0.75 0.86
17 A" 831 755 2.78 0.00 0.75 0.86
18 A" 275 250 0.04 0.01 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 15333.2 cm-1
Scaled (by 0.9084) Zero Point Vibrational Energy (zpe) 13928.7 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 HF/cc-pVQZ
ABC
1.02202 0.12604 0.11704

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/cc-pVQZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.571 -2.032 0.000
C2 0.596 -1.070 0.000
Br3 0.000 0.794 0.000
H4 1.209 -1.171 0.878
H5 1.209 -1.171 -0.878
H6 -0.192 -3.048 0.000
H7 -1.188 -1.898 0.877
H8 -1.188 -1.898 -0.877

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.51252.88322.16392.16391.08491.08081.0808
C21.51251.95741.07581.07582.12922.15382.1538
Br32.88321.95742.46882.46883.84723.07063.0706
H42.16391.07582.46881.75682.50182.50513.0591
H52.16391.07582.46881.75682.50183.05912.5051
H61.08492.12923.84722.50182.50181.75661.7566
H71.08082.15383.07062.50513.05911.75661.7546
H81.08082.15383.07063.05912.50511.75661.7546

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 111.741 C1 C2 H4 112.351
C1 C2 H5 112.351 C2 C1 H6 109.007
C2 C1 H7 111.209 C2 C1 H8 111.209
Br3 C2 H4 105.227 Br3 C2 H5 105.227
H4 C2 H5 109.473 H6 C1 H7 108.406
H6 C1 H8 108.406 H7 C1 H8 108.521
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVQZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.194      
2 C -0.126      
3 Br -0.177      
4 H 0.119      
5 H 0.119      
6 H 0.079      
7 H 0.090      
8 H 0.090      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.545 -2.387 0.000 2.449
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.090 -1.040 0.000
y -1.040 -30.411 0.000
z 0.000 0.000 -32.393
Traceless
 xyz
x -0.688 -1.040 0.000
y -1.040 1.830 0.000
z 0.000 0.000 -1.142
Polar
3z2-r2-2.284
x2-y2-1.679
xy-1.040
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.917 -0.189 0.000
y -0.189 8.498 0.000
z 0.000 0.000 5.535


<r2> (average value of r2) Å2
<r2> 105.669
(<r2>)1/2 10.280