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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: MP2=FULL/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2=FULL/cc-pVTZ
 hartrees
Energy at 0K-156.907137
Energy at 298.15K-156.915807
HF Energy-156.151259
Nuclear repulsion energy125.255921
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=FULL/cc-pVTZ
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' 3286 3120 13.65      
2 A' 3215 3052 11.10      
3 A' 3201 3039 7.14      
4 A' 3150 2990 19.02      
5 A' 3080 2924 26.60      
6 A' 1538 1460 0.89      
7 A' 1526 1449 9.15      
8 A' 1445 1372 3.89      
9 A' 1408 1337 2.04      
10 A' 1257 1194 0.03      
11 A' 1231 1169 0.09      
12 A' 1055 1001 6.75      
13 A' 1026 974 13.17      
14 A' 958 910 1.91      
15 A' 816 774 6.13      
16 A' 788 748 1.27      
17 A' 366 347 0.20      
18 A" 3273 3107 0.23      
19 A" 3195 3033 14.80      
20 A" 3154 2994 20.80      
21 A" 1516 1439 2.14      
22 A" 1488 1413 2.83      
23 A" 1209 1148 0.77      
24 A" 1159 1101 0.00      
25 A" 1125 1068 4.07      
26 A" 1072 1018 1.52      
27 A" 901 856 9.00      
28 A" 834 792 4.63      
29 A" 347 329 0.60      
30 A" 244 231 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24430.8 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 23194.6 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=FULL/cc-pVTZ
ABC
0.52556 0.21639 0.19008

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.350 0.409 0.000
C2 -0.887 1.253 0.000
H3 1.282 0.949 0.000
C4 0.350 -0.885 0.752
C5 0.350 -0.885 -0.752
H6 1.252 -1.189 1.252
H7 1.252 -1.189 -1.252
H8 -0.563 -1.162 1.248
H9 -0.563 -1.162 -1.248
H10 -1.770 0.619 0.000
H11 -0.934 1.888 0.881
H12 -0.934 1.888 -0.881

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.49781.07681.49641.49642.22122.22122.20502.20502.13042.14792.1479
C21.49782.18962.58222.58223.47933.47932.73842.73841.08721.08651.0865
H31.07682.18962.19032.19032.47812.47813.06953.06953.06922.56262.5626
C41.49642.58222.19031.50361.07482.21811.07622.21642.70593.05883.4647
C51.49642.58222.19031.50362.21811.07482.21641.07622.70593.46473.0588
H62.22123.47932.47811.07482.21812.50401.81513.08983.73713.79274.3353
H72.22123.47932.47812.21811.07482.50403.08981.81513.73714.33533.7927
H82.20502.73843.06951.07622.21641.81513.08982.49682.48753.09493.7384
H92.20502.73843.06952.21641.07623.08981.81512.49682.48753.73843.0949
H102.13041.08723.06922.70592.70593.73713.73712.48752.48751.75601.7560
H112.14791.08652.56263.05883.46473.79274.33533.09493.73841.75601.7611
H122.14791.08652.56263.46473.05884.33533.79273.73843.09491.75601.7611

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 109.994 C1 C2 H11 111.435
C1 C2 H12 111.435 C1 C4 H5 59.842
C1 C4 H6 118.584 C1 C4 H8 117.047
C1 H5 C4 59.842 C1 H5 H7 118.584
C1 H5 H9 117.047 C2 C1 C3 115.559
C2 C1 C4 119.174 C2 C1 H5 119.174
C3 C1 C4 115.718 C3 C1 H5 115.718
C4 C1 H5 60.316 C4 H5 H7 117.735
C4 H5 H9 117.482 H5 C4 H6 117.735
H5 C4 H8 117.482 H6 C4 H8 115.102
H7 H5 H9 115.102 H10 C2 H11 107.776
H10 C2 H12 107.776 H11 C2 H12 108.279
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability