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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: CCD/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCD/6-31+G**
 hartrees
Energy at 0K-156.732987
Energy at 298.15K-156.741670
HF Energy-156.111037
Nuclear repulsion energy124.285751
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 CCD/6-31+G**
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' 3305 3114 27.47      
2 A' 3222 3036 15.97      
3 A' 3212 3027 16.54      
4 A' 3176 2993 21.94      
5 A' 3096 2917 35.66      
6 A' 1578 1487 0.95      
7 A' 1552 1462 7.30      
8 A' 1482 1396 3.28      
9 A' 1442 1359 2.57      
10 A' 1272 1198 0.07      
11 A' 1247 1175 0.15      
12 A' 1115 1051 7.38      
13 A' 1033 973 11.22      
14 A' 970 914 2.01      
15 A' 823 775 4.23      
16 A' 797 751 4.50      
17 A' 373 351 0.21      
18 A" 3292 3102 0.20      
19 A" 3206 3021 23.33      
20 A" 3176 2993 32.41      
21 A" 1540 1452 1.74      
22 A" 1522 1434 1.36      
23 A" 1239 1167 0.65      
24 A" 1192 1124 0.00      
25 A" 1145 1079 3.20      
26 A" 1121 1056 1.12      
27 A" 907 855 10.65      
28 A" 855 805 5.03      
29 A" 352 331 0.54      
30 A" 226 213 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24731.9 cm-1
Scaled (by 0.9423) Zero Point Vibrational Energy (zpe) 23304.9 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 CCD/6-31+G**
ABC
0.52137 0.21172 0.18593

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.348 0.404 0.000
C2 -0.884 1.280 0.000
H3 1.288 0.944 0.000
C4 0.348 -0.898 0.755
C5 0.348 -0.898 -0.755
H6 1.252 -1.202 1.265
H7 1.252 -1.202 -1.265
H8 -0.567 -1.185 1.259
H9 -0.567 -1.185 -1.259
H10 -1.787 0.666 0.000
H11 -0.914 1.920 0.885
H12 -0.914 1.920 -0.885

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.51191.08441.50591.50592.23592.23592.22422.22422.15112.16102.1610
C21.51192.19872.61462.61463.51123.51122.78642.78641.09201.09191.0919
H31.08442.19872.20222.20222.49162.49163.09183.09183.08822.56592.5659
C41.50592.61462.20221.51071.08162.23431.08262.23042.75263.09023.4960
C51.50592.61462.20221.51072.23431.08162.23041.08262.75263.49603.0902
H62.23593.51122.49161.08162.23432.53011.81893.11083.78543.81854.3656
H72.23593.51122.49162.23431.08162.53013.11081.81893.78544.36563.8185
H82.22422.78643.09181.08262.23041.81893.11082.51732.54983.14643.7887
H92.22422.78643.09182.23041.08263.11081.81892.51732.54983.78873.1464
H102.15111.09203.08822.75262.75263.78543.78542.54982.54981.76561.7656
H112.16101.09192.56593.09023.49603.81854.36563.14643.78871.76561.7694
H122.16101.09192.56593.49603.09024.36563.81853.78873.14641.76561.7694

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.361 C1 C2 H11 111.165
C1 C2 H12 111.165 C1 C4 H5 59.894
C1 C4 H6 118.652 C1 C4 H8 117.540
C1 H5 C4 59.894 C1 H5 H7 118.652
C1 H5 H9 117.540 C2 C1 C3 114.745
C2 C1 C4 120.086 C2 C1 H5 120.086
C3 C1 C4 115.499 C3 C1 H5 115.499
C4 C1 H5 60.212 C4 H5 H7 118.117
C4 H5 H9 117.704 H5 C4 H6 118.117
H5 C4 H8 117.704 H6 C4 H8 114.377
H7 H5 H9 114.377 H10 C2 H11 107.889
H10 C2 H12 107.889 H11 C2 H12 108.242
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability