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All results from a given calculation for CH3CHBrCH3 (i-propyl bromide)

using model chemistry: QCISD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/6-31G(2df,p)
 hartrees
Energy at 0K-2688.478239
Energy at 298.15K-2688.488795
HF Energy-2687.771218
Nuclear repulsion energy252.816509
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 QCISD/6-31G(2df,p)
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' 3185 3018 16.63      
2 A' 3164 2998 28.19      
3 A' 3139 2974 0.65      
4 A' 3083 2921 19.53      
5 A' 1535 1454 5.82      
6 A' 1524 1444 7.11      
7 A' 1451 1374 4.05      
8 A' 1289 1221 39.77      
9 A' 1205 1142 18.37      
10 A' 1082 1025 7.71      
11 A' 919 871 4.50      
12 A' 585 554 11.69      
13 A' 408 387 0.86      
14 A' 310 293 0.84      
15 A' 275 260 0.37      
16 A" 3181 3013 8.18      
17 A" 3158 2992 1.05      
18 A" 3079 2917 9.88      
19 A" 1515 1435 0.73      
20 A" 1513 1433 1.83      
21 A" 1436 1361 7.80      
22 A" 1380 1308 0.61      
23 A" 1168 1107 0.57      
24 A" 974 923 0.01      
25 A" 952 902 1.18      
26 A" 296 281 0.47      
27 A" 254 240 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 21029.6 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 19923.4 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 QCISD/6-31G(2df,p)
ABC
0.26861 0.09882 0.07756

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.897 -0.411 0.000
Br2 -0.666 0.744 0.000
H3 1.747 0.271 0.000
C4 0.897 -1.253 1.268
C5 0.897 -1.253 -1.268
H6 0.018 -1.901 1.298
H7 1.792 -1.883 1.289
H8 0.893 -0.626 2.161
H9 0.018 -1.901 -1.298
H10 1.792 -1.883 -1.289
H11 0.893 -0.626 -2.161

Atom - Atom Distances (Å)
  C1 Br2 H3 C4 C5 H6 H7 H8 H9 H10 H11
C11.94351.09041.52251.52252.16292.15152.17132.16292.15152.1713
Br21.94352.45902.83582.83583.02483.82182.99603.02483.82182.9960
H31.09042.45902.15802.15803.06542.51122.49073.06542.51122.4907
C41.52252.83582.15802.53651.09251.09471.09102.78912.78123.4859
C51.52252.83582.15802.53652.78912.78123.48591.09251.09471.0910
H62.16293.02483.06541.09252.78911.77451.77092.59643.13693.7889
H72.15153.82182.51121.09472.78121.77451.77493.13692.57713.7798
H82.17132.99602.49071.09103.48591.77091.77493.78893.77984.3213
H92.16293.02483.06542.78911.09252.59643.13693.78891.77451.7709
H102.15153.82182.51122.78121.09473.13692.57713.77981.77451.7749
H112.17132.99602.49073.48591.09103.78893.77984.32131.77091.7749

picture of i-propyl bromide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C4 H6 110.528 C1 C4 H7 109.504
C1 C4 H8 111.294 C1 C5 H9 110.528
C1 C5 H10 109.504 C1 C5 H11 111.294
Br2 C1 H3 104.768 Br2 C1 C4 109.204
Br2 C1 C5 109.204 H3 C1 C4 110.260
H3 C1 C5 110.260 C4 C1 C5 112.821
H6 C4 H7 108.452 H6 C4 H8 108.398
H7 C4 H8 108.595 H9 C5 H10 108.452
H9 C5 H11 108.398 H10 C5 H11 108.595
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability