return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: QCISD(T)/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD(T)/6-31G*
 hartrees
Energy at 0K-2688.150218
Energy at 298.15K-2688.160723
HF Energy-2687.576464
Nuclear repulsion energy249.580314
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(T)/6-31G*
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' 3157 3028        
2 A' 3132 3004        
3 A' 3114 2987        
4 A' 3051 2927        
5 A' 1546 1483        
6 A' 1536 1474        
7 A' 1463 1403        
8 A' 1287 1234        
9 A' 1213 1163        
10 A' 1077 1034        
11 A' 913 876        
12 A' 552 529        
13 A' 410 393        
14 A' 305 293        
15 A' 274 263        
16 A" 3152 3024        
17 A" 3125 2998        
18 A" 3047 2923        
19 A" 1528 1465        
20 A" 1524 1462        
21 A" 1451 1391        
22 A" 1392 1336        
23 A" 1175 1127        
24 A" 978 938        
25 A" 960 921        
26 A" 293 281        
27 A" 257 246        

Unscaled Zero Point Vibrational Energy (zpe) 20954.4 cm-1
Scaled (by 0.9593) Zero Point Vibrational Energy (zpe) 20101.5 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(T)/6-31G*
ABC
0.26618 0.09561 0.07544

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.458 -0.913 0.000
Br2 -0.066 1.014 0.000
H3 1.552 -0.878 0.000
C4 -0.066 -1.562 1.274
C5 -0.066 -1.562 -1.274
H6 -1.163 -1.525 1.300
H7 0.250 -2.616 1.302
H8 0.321 -1.056 2.166
H9 -1.163 -1.525 -1.300
H10 0.250 -2.616 -1.302
H11 0.321 -1.056 -2.166

Atom - Atom Distances (Å)
  C1 Br2 H3 C4 C5 H6 H7 H8 H9 H10 H11
C11.99761.09531.52251.52252.16582.15322.17492.16582.15322.1749
Br21.99762.49032.87382.87383.05653.86913.02093.05653.86913.0209
H31.09532.49032.17042.17043.07922.53212.49793.07922.53212.4979
C41.52252.87382.17042.54801.09731.10041.09602.79822.80133.4984
C51.52252.87382.17042.54802.79822.80133.49841.09731.10041.0960
H62.16583.05653.07921.09732.79821.78401.78062.60043.15523.7993
H72.15323.86912.53211.10042.80131.78401.78423.15522.60453.8034
H82.17493.02092.49791.09603.49841.78061.78423.79933.80344.3318
H92.16583.05653.07922.79821.09732.60043.15523.79931.78401.7806
H102.15323.86912.53212.80131.10043.15522.60453.80341.78401.7842
H112.17493.02092.49793.49841.09603.79933.80344.33181.78061.7842

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 110.472 C1 C4 H7 109.296
C1 C4 H8 111.274 C1 C5 H9 110.472
C1 C5 H10 109.296 C1 C5 H11 111.274
Br2 C1 H3 103.368 Br2 C1 C4 108.701
Br2 C1 C5 108.701 H3 C1 C4 110.957
H3 C1 C5 110.957 C4 C1 C5 113.605
H6 C4 H7 108.533 H6 C4 H8 108.553
H7 C4 H8 108.649 H9 C5 H10 108.533
H9 C5 H11 108.553 H10 C5 H11 108.649
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability