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All results from a given calculation for C4H8 (methylcyclopropane)

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 CS 1A'
Energy calculated at CID/6-31G*
 hartrees
Energy at 0K-156.583614
Energy at 298.15K-156.592358
HF Energy-156.095765
Nuclear repulsion energy124.635446
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' 3337 3083 27.34      
2 A' 3259 3011 12.17      
3 A' 3251 3003 20.93      
4 A' 3215 2970 19.78      
5 A' 3142 2902 29.91      
6 A' 1617 1494 1.07      
7 A' 1591 1469 7.06      
8 A' 1522 1406 3.14      
9 A' 1480 1367 1.84      
10 A' 1306 1206 0.13      
11 A' 1278 1180 0.07      
12 A' 1147 1059 5.54      
13 A' 1059 978 10.28      
14 A' 993 917 3.30      
15 A' 843 779 5.23      
16 A' 817 754 2.48      
17 A' 381 352 0.19      
18 A" 3324 3070 0.25      
19 A" 3244 2997 21.69      
20 A" 3217 2971 30.75      
21 A" 1582 1462 1.71      
22 A" 1557 1438 1.85      
23 A" 1269 1172 0.40      
24 A" 1226 1132 0.39      
25 A" 1175 1086 4.54      
26 A" 1153 1065 1.29      
27 A" 938 866 8.63      
28 A" 872 805 4.95      
29 A" 358 330 0.65      
30 A" 230 213 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 25190.9 cm-1
Scaled (by 0.9237) Zero Point Vibrational Energy (zpe) 23268.8 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
0.52577 0.21264 0.18683

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 0.345 0.400 0.000
C2 -0.879 1.280 0.000
H3 1.285 0.939 0.000
C4 0.345 -0.897 0.751
C5 0.345 -0.897 -0.751
H6 1.248 -1.200 1.263
H7 1.248 -1.200 -1.263
H8 -0.566 -1.186 1.257
H9 -0.566 -1.186 -1.257
H10 -1.788 0.677 0.000
H11 -0.904 1.920 0.883
H12 -0.904 1.920 -0.883

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.50821.08371.49841.49842.22902.22902.21942.21942.15092.15732.1573
C21.50822.19082.60832.60833.50293.50292.78602.78601.09101.09101.0910
H31.08372.19082.19522.19522.48452.48453.08633.08633.08402.55652.5565
C41.49842.60832.19521.50191.08122.22811.08202.22402.75493.08483.4884
C51.49842.60832.19521.50192.22811.08122.22401.08202.75493.48843.0848
H62.22903.50292.48451.08122.22812.52701.81433.10553.78573.80934.3559
H72.22903.50292.48452.22811.08122.52703.10551.81433.78574.35593.8093
H82.21942.78603.08631.08202.22401.81433.10552.51392.55773.14723.7875
H92.21942.78603.08632.22401.08203.10551.81432.51392.55773.78753.1472
H102.15091.09103.08402.75492.75493.78573.78572.55772.55771.76291.7629
H112.15731.09102.55653.08483.48843.80934.35593.14723.78751.76291.7662
H122.15731.09102.55653.48843.08484.35593.80933.78753.14721.76291.7662

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.667 C1 C2 H11 111.182
C1 C2 H12 111.182 C1 C4 H5 59.921
C1 C4 H6 118.673 C1 C4 H8 117.756
C1 H5 C4 59.921 C1 H5 H7 118.673
C1 H5 H9 117.756 C2 C1 C3 114.406
C2 C1 C4 120.354 C2 C1 H5 120.354
C3 C1 C4 115.523 C3 C1 H5 115.523
C4 C1 H5 60.158 C4 H5 H7 118.297
C4 H5 H9 117.881 H5 C4 H6 118.297
H5 C4 H8 117.881 H6 C4 H8 114.007
H7 H5 H9 114.007 H10 C2 H11 107.787
H10 C2 H12 107.787 H11 C2 H12 108.090
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability