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

using model chemistry: QCISD/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 QCISD/3-21G
 hartrees
Energy at 0K-2677.453732
Energy at 298.15K-2677.464255
HF Energy-2677.093861
Nuclear repulsion energy246.598112
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/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' 3126 3030 31.44      
2 A' 3104 3009 9.33      
3 A' 3089 2994 12.93      
4 A' 3026 2933 22.70      
5 A' 1580 1531 8.25      
6 A' 1571 1523 6.65      
7 A' 1488 1443 4.70      
8 A' 1311 1271 42.85      
9 A' 1227 1190 25.17      
10 A' 1098 1064 5.79      
11 A' 884 857 5.01      
12 A' 552 535 10.38      
13 A' 410 398 0.77      
14 A' 302 292 1.21      
15 A' 268 260 0.49      
16 A" 3111 3015 12.35      
17 A" 3088 2993 4.86      
18 A" 3022 2929 9.28      
19 A" 1563 1515 2.27      
20 A" 1560 1512 1.96      
21 A" 1473 1428 9.68      
22 A" 1399 1356 0.87      
23 A" 1142 1107 2.10      
24 A" 998 967 2.16      
25 A" 977 947 0.24      
26 A" 286 277 0.49      
27 A" 257 249 0.02      

Unscaled Zero Point Vibrational Energy (zpe) 20957.2 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 20311.8 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/3-21G
ABC
0.26368 0.09242 0.07331

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.937 -0.435 0.000
Br2 -0.694 0.767 0.000
H3 1.781 0.262 0.000
C4 0.937 -1.289 1.281
C5 0.937 -1.289 -1.281
H6 0.053 -1.941 1.300
H7 1.842 -1.916 1.297
H8 0.927 -0.656 2.178
H9 0.053 -1.941 -1.300
H10 1.842 -1.916 -1.297
H11 0.927 -0.656 -2.178

Atom - Atom Distances (Å)
  C1 Br2 H3 C4 C5 H6 H7 H8 H9 H10 H11
C12.02591.09431.53961.53962.17742.16732.18872.17742.16732.1887
Br22.02592.52612.92022.92023.09563.91343.06523.09563.91343.0652
H31.09432.52612.18132.18133.08682.53592.51253.08682.53592.5125
C41.53962.92022.18132.56191.09841.10151.09752.80532.80363.5159
C51.53962.92022.18132.56192.80532.80363.51591.09841.10151.0975
H62.17743.09563.08681.09842.80531.78901.78462.60083.15413.8094
H72.16733.91342.53591.10152.80361.78901.78893.15412.59453.8078
H82.18873.06522.51251.09753.51591.78461.78893.80943.80784.3550
H92.17743.09563.08682.80531.09842.60083.15413.80941.78901.7846
H102.16733.91342.53592.80361.10153.15412.59453.80781.78901.7889
H112.18873.06522.51253.51591.09753.80943.80784.35501.78461.7889

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 110.129 C1 C4 H7 109.165
C1 C4 H8 111.080 C1 C5 H9 110.129
C1 C5 H10 109.165 C1 C5 H11 111.080
Br2 C1 H3 104.087 Br2 C1 C4 109.210
Br2 C1 C5 109.210 H3 C1 C4 110.681
H3 C1 C5 110.681 C4 C1 C5 112.607
H6 C4 H7 108.825 H6 C4 H8 108.719
H7 C4 H8 108.881 H9 C5 H10 108.825
H9 C5 H11 108.719 H10 C5 H11 108.881
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability