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

using model chemistry: MP2/CEP-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/CEP-31G
 hartrees
Energy at 0K-33.900887
Energy at 298.15K-33.911288
HF Energy-33.623392
Nuclear repulsion energy68.883460
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 MP2/CEP-31G
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' 3159 3052 77.23      
2 A' 3136 3031 73.52      
3 A' 3120 3015 1.21      
4 A' 3031 2929 47.07      
5 A' 1527 1476 8.76      
6 A' 1517 1465 9.70      
7 A' 1464 1415 5.02      
8 A' 1299 1256 63.57      
9 A' 1212 1171 27.87      
10 A' 1086 1050 11.43      
11 A' 896 866 6.93      
12 A' 536 518 16.99      
13 A' 398 384 1.27      
14 A' 293 283 1.20      
15 A' 258 250 0.59      
16 A" 3151 3045 23.31      
17 A" 3128 3022 6.96      
18 A" 3029 2927 28.79      
19 A" 1512 1461 1.47      
20 A" 1505 1454 2.45      
21 A" 1446 1397 9.06      
22 A" 1370 1324 3.17      
23 A" 1161 1122 1.29      
24 A" 981 948 0.22      
25 A" 955 923 2.06      
26 A" 277 268 0.29      
27 A" 234 226 0.04      

Unscaled Zero Point Vibrational Energy (zpe) 20840.2 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 20137.9 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 MP2/CEP-31G
ABC
0.25468 0.09047 0.07144

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.939 -0.452 0.000
Br2 -0.696 0.780 0.000
H3 1.791 0.256 0.000
C4 0.939 -1.308 1.306
C5 0.939 -1.308 -1.306
H6 0.050 -1.974 1.341
H7 1.856 -1.939 1.323
H8 0.934 -0.665 2.209
H9 0.050 -1.974 -1.341
H10 1.856 -1.939 -1.323
H11 0.934 -0.665 -2.209

Atom - Atom Distances (Å)
  C1 Br2 H3 C4 C5 H6 H7 H8 H9 H10 H11
C12.04761.10881.56141.56142.21402.19122.21932.21402.19122.2193
Br22.04762.54212.95662.95663.15273.95723.10273.15273.95723.1027
H31.10882.54212.20922.20923.13092.56382.54253.13092.56382.5425
C41.56142.95662.20922.61181.11041.11351.10892.87022.85463.5734
C51.56142.95662.20922.61182.87022.85463.57341.11041.11351.1089
H62.21403.15273.13091.11042.87021.80641.80182.68223.21843.8855
H72.19123.95722.56381.11352.85461.80641.80543.21842.64523.8661
H82.21933.10272.54251.10893.57341.80181.80543.88553.86614.4182
H92.21403.15273.13092.87021.11042.68223.21843.88551.80641.8018
H102.19123.95722.56382.85461.11353.21842.64523.86611.80641.8054
H112.21933.10272.54253.57341.10893.88553.86614.41821.80181.8054

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 110.784 C1 C4 H7 108.847
C1 C4 H8 111.295 C1 C5 H9 110.784
C1 C5 H10 108.847 C1 C5 H11 111.295
Br2 C1 H3 103.248 Br2 C1 C4 109.274
Br2 C1 C5 109.274 H3 C1 C4 110.512
H3 C1 C5 110.512 C4 C1 C5 113.513
H6 C4 H7 108.637 H6 C4 H8 108.559
H7 C4 H8 108.656 H9 C5 H10 108.637
H9 C5 H11 108.559 H10 C5 H11 108.656
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability