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

using model chemistry: MP2/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 2A'
Energy calculated at MP2/aug-cc-pVDZ
 hartrees
Energy at 0K-157.262885
Energy at 298.15K-157.271621
Nuclear repulsion energy125.930246
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/aug-cc-pVDZ
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 3182 3051 17.32      
2 A 3149 3020 42.44      
3 A 3144 3015 44.40      
4 A 3052 2927 17.21      
5 A 2980 2858 24.81      
6 A 1505 1443 7.57      
7 A 1492 1431 5.02      
8 A 1476 1415 3.06      
9 A 1397 1339 4.04      
10 A 1322 1268 3.92      
11 A 1207 1158 0.23      
12 A 1086 1042 0.84      
13 A 997 956 0.54      
14 A 832 798 0.04      
15 A 527 506 30.22      
16 A 406 389 13.83      
17 A 361 346 0.57      
18 A 267 256 0.22      
19 A 3298 3163 12.48      
20 A 3147 3018 14.92      
21 A 3142 3013 6.39      
22 A 3051 2926 33.69      
23 A 1481 1420 2.55      
24 A 1477 1417 0.00      
25 A 1381 1324 4.45      
26 A 1324 1270 0.54      
27 A 1191 1142 0.21      
28 A 980 939 0.00      
29 A 939 900 0.60      
30 A 903 866 0.34      
31 A 372 357 0.21      
32 A 234 224 0.00      
33 A 134 128 0.14      

Unscaled Zero Point Vibrational Energy (zpe) 25717.0 cm-1
Scaled (by 0.959) Zero Point Vibrational Energy (zpe) 24662.6 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/aug-cc-pVDZ
ABC
0.27922 0.26338 0.15386

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.363 0.000
C2 1.482 0.125 0.000
H3 -0.177 1.461 0.000
H4 2.047 0.130 0.935
H5 2.047 0.130 -0.935
C6 -0.656 -0.209 -1.267
C7 -0.656 -0.209 1.267
H8 -0.534 -1.304 -1.299
H9 -1.734 0.019 -1.289
H10 -0.199 0.213 -2.177
H11 -0.534 -1.304 1.299
H12 -1.734 0.019 1.289
H13 -0.199 0.213 2.177

Atom - Atom Distances (Å)
  C1 C2 H3 H4 H5 C6 C7 H8 H9 H10 H11 H12 H13
C11.50071.11172.26222.26221.53731.53732.18032.18772.19102.18032.18772.1910
C21.50072.12931.09221.09222.50762.50762.79193.46602.75162.79193.46602.7516
H31.11172.12932.75482.75482.15002.15003.07582.48262.50903.07582.48262.5090
H42.26221.09222.75481.86933.50272.74443.70254.38763.83832.97503.79912.5679
H52.26221.09222.75481.86932.74443.50272.97503.79912.56793.70254.38763.8383
C61.53732.50762.15003.50272.74442.53431.10271.10201.10192.79322.78323.4996
C71.53732.50762.15002.74443.50272.53432.79322.78323.49961.10271.10201.1019
H82.18032.79193.07583.70252.97501.10272.79321.78661.78452.59873.14483.8076
H92.18773.46602.48264.38763.79911.10202.78321.78661.78393.14482.57743.7951
H102.19102.75162.50903.83832.56791.10193.49961.78451.78393.80763.79514.3535
H112.18032.79193.07582.97503.70252.79321.10272.59873.14483.80761.78661.7845
H122.18773.46602.48263.79914.38762.78321.10203.14482.57743.79511.78661.7839
H132.19102.75162.50902.56793.83833.49961.10193.80763.79514.35351.78451.7839

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 120.673 C1 C2 H5 120.673
C1 C6 H8 110.262 C1 C6 H9 110.893
C1 C6 H10 111.156 C1 C7 H11 110.262
C1 C7 H12 110.893 C1 C7 H13 111.156
C2 C1 H3 108.272 C2 C1 C6 111.251
C2 C1 C7 111.251 H3 C1 C6 107.422
H3 C1 C7 107.422 H4 C2 H5 117.684
C6 C1 C7 111.029 H8 C6 H9 108.266
H8 C6 H10 108.079 H9 C6 H10 108.080
H11 C7 H12 108.266 H11 C7 H13 108.079
H12 C7 H13 108.080
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability