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All results from a given calculation for CH2CH(CH3)2 (Isobutyl radical)

using model chemistry: CID/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 2A'
Energy calculated at CID/6-31G*
 hartrees
Energy at 0K-157.145137
Energy at 298.15K-157.154035
HF Energy-156.666502
Nuclear repulsion energy126.712214
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/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3259 3010 15.64      
2 A 3225 2979 64.05      
3 A 3223 2977 43.45      
4 A 3146 2906 15.01      
5 A 3064 2830 33.76      
6 A 1601 1479 8.13      
7 A 1592 1471 4.35      
8 A 1551 1432 1.05      
9 A 1507 1392 4.16      
10 A 1419 1311 4.27      
11 A 1275 1178 0.95      
12 A 1160 1071 1.58      
13 A 1041 962 0.77      
14 A 861 795 0.01      
15 A 538 497 21.10      
16 A 418 386 18.57      
17 A 380 351 1.08      
18 A 276 255 0.15      
19 A 3360 3104 17.53      
20 A 3221 2975 22.25      
21 A 3220 2974 0.53      
22 A 3141 2902 32.97      
23 A 1582 1461 2.63      
24 A 1579 1458 0.06      
25 A 1494 1380 5.32      
26 A 1429 1320 0.55      
27 A 1251 1155 0.19      
28 A 1025 947 0.07      
29 A 994 918 0.75      
30 A 958 885 0.45      
31 A 388 359 0.08      
32 A 246 227 0.00      
33 A 154 143 0.58      

Unscaled Zero Point Vibrational Energy (zpe) 26787.4 cm-1
Scaled (by 0.9237) Zero Point Vibrational Energy (zpe) 24743.5 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 CID/6-31G*
ABC
0.28202 0.26638 0.15531

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.359 0.000
C2 1.477 0.116 0.000
H3 -0.172 1.445 0.000
H4 2.038 0.143 0.923
H5 2.038 0.143 -0.923
C6 -0.654 -0.206 -1.261
C7 -0.654 -0.206 1.261
H8 -0.532 -1.290 -1.302
H9 -1.721 0.016 -1.280
H10 -0.206 0.217 -2.161
H11 -0.532 -1.290 1.302
H12 -1.721 0.016 1.280
H13 -0.206 0.217 2.161

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 C6 C7 H8 H9 H10 H11 H12 H13
C11.49671.09952.24822.24821.52901.52902.16772.17272.17532.16772.17272.1753
C21.49672.11781.08101.08102.49692.49692.77673.44662.74052.77673.44662.7405
H31.09952.11782.72692.72692.13302.13303.05052.46622.48583.05052.46622.4858
H42.24821.08102.72691.84673.48452.73573.68974.36003.81492.96713.77892.5637
H52.24821.08102.72691.84672.73573.48452.96713.77892.56373.68974.36003.8149
C61.52902.49692.13303.48452.73572.52231.09101.09071.09072.78582.76573.4771
C71.52902.49692.13302.73573.48452.52232.78582.76573.47711.09101.09071.0907
H82.16772.77673.05053.68972.96711.09102.78581.76641.76452.60503.12913.7910
H92.17273.44662.46624.36003.77891.09072.76571.76641.76453.12912.56093.7658
H102.17532.74052.48583.81492.56371.09073.47711.76451.76453.79103.76584.3217
H112.16772.77673.05052.96713.68972.78581.09102.60503.12913.79101.76641.7645
H122.17273.44662.46623.77894.36002.76571.09073.12912.56093.76581.76641.7645
H132.17532.74052.48582.56373.81493.47711.09073.79103.76584.32171.76451.7645

picture of Isobutyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 120.573 C1 C2 H5 120.573
C1 C6 H8 110.541 C1 C6 H9 110.963
C1 C6 H10 111.168 C1 C7 H11 110.541
C1 C7 H12 110.963 C1 C7 H13 111.168
C2 C1 H3 108.349 C2 C1 C6 111.221
C2 C1 C7 111.221 H3 C1 C6 107.358
H3 C1 C7 107.358 H4 C2 H5 117.332
C6 C1 C7 111.138 H8 C6 H9 108.118
H8 C6 H10 107.956 H9 C6 H10 107.970
H11 C7 H12 108.118 H11 C7 H13 107.956
H12 C7 H13 107.970
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability