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

using model chemistry: CID/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 CID/3-21G*
 hartrees
Energy at 0K-2638.797353
Energy at 298.15K 
HF Energy-2638.485076
Nuclear repulsion energy163.229202
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 CID/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' 3182 2961 24.25      
2 A' 3170 2949 0.45      
3 A' 3110 2894 14.33      
4 A' 1610 1498 3.46      
5 A' 1591 1480 3.80      
6 A' 1517 1412 6.86      
7 A' 1369 1274 47.63      
8 A' 1124 1046 3.26      
9 A' 994 925 9.17      
10 A' 611 569 12.45      
11 A' 299 279 1.82      
12 A" 3236 3011 9.59      
13 A" 3195 2973 6.66      
14 A" 1600 1489 8.85      
15 A" 1349 1255 0.53      
16 A" 1106 1029 0.02      
17 A" 820 763 5.51      
18 A" 271 252 0.05      

Unscaled Zero Point Vibrational Energy (zpe) 15076.5 cm-1
Scaled (by 0.9305) Zero Point Vibrational Energy (zpe) 14028.7 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 CID/3-21G*
ABC
0.97893 0.12563 0.11623

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.586 -2.032 0.000
C2 0.615 -1.076 0.000
Br3 0.000 0.796 0.000
H4 1.229 -1.192 0.891
H5 1.229 -1.192 -0.891
H6 -0.231 -3.068 0.000
H7 -1.201 -1.870 0.887
H8 -1.201 -1.870 -0.887

Atom - Atom Distances (Å)
  C1 C2 Br3 H4 H5 H6 H7 H8
C11.53542.88782.18942.18941.09481.09121.0912
C21.53541.97041.08781.08782.16362.17142.1714
Br32.88781.97042.50092.50093.87013.05483.0548
H42.18941.08782.50091.78162.53812.52263.0859
H52.18941.08782.50091.78162.53813.08592.5226
H61.09482.16363.87012.53812.53811.77841.7784
H71.09122.17143.05482.52263.08591.77841.7734
H81.09122.17143.05483.08592.52261.77841.7734

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 110.302 C1 C2 H4 112.031
C1 C2 H5 112.031 C2 C1 H6 109.559
C2 C1 H7 110.382 C2 C1 H8 110.382
Br3 C2 H4 106.096 Br3 C2 H5 106.096
H4 C2 H5 109.952 H6 C1 H7 108.893
H6 C1 H8 108.893 H7 C1 H8 108.697
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability