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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: MP2=FULL/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 MP2=FULL/6-31G**
 hartrees
Energy at 0K-156.703044
Energy at 298.15K-156.711742
HF Energy-156.108991
Nuclear repulsion energy124.749420
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/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' 3335 3117 19.58      
2 A' 3246 3033 17.11      
3 A' 3235 3022 11.89      
4 A' 3213 3002 15.41      
5 A' 3120 2915 27.44      
6 A' 1580 1477 0.62      
7 A' 1564 1461 6.07      
8 A' 1482 1385 2.65      
9 A' 1443 1349 2.72      
10 A' 1279 1195 0.20      
11 A' 1253 1171 0.12      
12 A' 1111 1038 7.08      
13 A' 1043 975 8.78      
14 A' 974 910 2.37      
15 A' 828 773 4.75      
16 A' 801 749 1.62      
17 A' 371 347 0.22      
18 A" 3323 3105 0.19      
19 A" 3229 3017 16.89      
20 A" 3214 3004 25.34      
21 A" 1555 1453 1.34      
22 A" 1528 1428 1.05      
23 A" 1240 1158 0.50      
24 A" 1195 1117 0.02      
25 A" 1152 1076 3.92      
26 A" 1112 1039 1.30      
27 A" 917 857 7.06      
28 A" 851 795 4.36      
29 A" 351 328 0.62      
30 A" 238 222 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24891.2 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 23258.4 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/6-31G**
ABC
0.52469 0.21360 0.18766

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.347 0.405 0.000
C2 -0.882 1.272 0.000
H3 1.286 0.944 0.000
C4 0.347 -0.894 0.752
C5 0.347 -0.894 -0.752
H6 1.249 -1.196 1.262
H7 1.249 -1.196 -1.262
H8 -0.566 -1.178 1.254
H9 -0.566 -1.178 -1.254
H10 -1.779 0.654 0.000
H11 -0.917 1.910 0.882
H12 -0.917 1.910 -0.882

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.50491.08251.50051.50052.22892.22892.21592.21592.14142.15462.1546
C21.50492.19302.60172.60173.49683.49682.76992.76991.08941.08921.0892
H31.08252.19302.19632.19632.48452.48453.08293.08293.07912.56202.5620
C41.50052.60172.19631.50391.07942.22731.08032.22222.73573.07833.4828
C51.50052.60172.19631.50392.22731.07942.22221.08032.73573.48283.0783
H62.22893.49682.48451.07942.22732.52411.81583.10263.76673.80554.3516
H72.22893.49682.48452.22731.07942.52413.10261.81583.76674.35163.8055
H82.21592.76993.08291.08032.22221.81583.10262.50742.52943.12943.7707
H92.21592.76993.08292.22221.08033.10261.81582.50742.52943.77073.1294
H102.14141.08943.07912.73572.73573.76673.76672.52942.52941.76061.7606
H112.15461.08922.56203.07833.48283.80554.35163.12943.77071.76061.7646
H122.15461.08922.56203.48283.07834.35163.80553.77073.12941.76061.7646

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.235 C1 C2 H11 111.311
C1 C2 H12 111.311 C1 C4 H5 59.925
C1 C4 H6 118.616 C1 C4 H8 117.393
C1 H5 C4 59.925 C1 H5 H7 118.616
C1 H5 H9 117.393 C2 C1 C3 114.922
C2 C1 C4 119.919 C2 C1 H5 119.919
C3 C1 C4 115.540 C3 C1 H5 115.540
C4 C1 H5 60.150 C4 H5 H7 118.201
C4 H5 H9 117.674 H5 C4 H6 118.201
H5 C4 H8 117.674 H6 C4 H8 114.444
H7 H5 H9 114.444 H10 C2 H11 107.824
H10 C2 H12 107.824 H11 C2 H12 108.199
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability