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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: MP2=FULL/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 MP2=FULL/6-31+G**
 hartrees
Energy at 0K-156.710467
Energy at 298.15K-156.719151
HF Energy-156.111120
Nuclear repulsion energy124.612402
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/6-31+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' 3327 3125 19.18      
2 A' 3238 3041 16.52      
3 A' 3225 3029 11.55      
4 A' 3200 3006 17.36      
5 A' 3107 2918 34.36      
6 A' 1568 1473 0.97      
7 A' 1549 1455 8.95      
8 A' 1470 1381 4.02      
9 A' 1433 1346 2.42      
10 A' 1271 1193 0.05      
11 A' 1246 1170 0.16      
12 A' 1098 1031 11.76      
13 A' 1035 972 11.34      
14 A' 970 911 1.99      
15 A' 824 774 4.81      
16 A' 797 749 4.18      
17 A' 372 349 0.22      
18 A" 3314 3113 0.16      
19 A" 3220 3024 18.92      
20 A" 3201 3006 26.71      
21 A" 1537 1444 2.11      
22 A" 1517 1424 1.97      
23 A" 1232 1157 0.87      
24 A" 1182 1111 0.05      
25 A" 1142 1073 3.63      
26 A" 1104 1037 1.72      
27 A" 905 850 10.79      
28 A" 852 801 5.26      
29 A" 352 331 0.67      
30 A" 233 219 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24760.1 cm-1
Scaled (by 0.9392) Zero Point Vibrational Energy (zpe) 23254.7 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/6-31+G**
ABC
0.52287 0.21331 0.18734

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.348 0.406 0.000
C2 -0.884 1.272 0.000
H3 1.288 0.944 0.000
C4 0.348 -0.894 0.754
C5 0.348 -0.894 -0.754
H6 1.252 -1.198 1.262
H7 1.252 -1.198 -1.262
H8 -0.567 -1.178 1.255
H9 -0.567 -1.178 -1.255
H10 -1.780 0.651 0.000
H11 -0.919 1.909 0.884
H12 -0.919 1.909 -0.884

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.50621.08311.50271.50272.23172.23172.21792.21792.14242.15552.1555
C21.50622.19642.60352.60353.50063.50062.77032.77031.09021.09011.0901
H31.08312.19642.19812.19812.48672.48673.08513.08513.08202.56522.5652
C41.50272.60352.19811.50791.08002.22961.08112.22562.73603.07913.4851
C51.50272.60352.19811.50792.22961.08002.22561.08112.73603.48513.0791
H62.23173.50062.48671.08002.22962.52301.81883.10493.76873.80924.3553
H72.23173.50062.48672.22961.08002.52303.10491.81883.76874.35533.8092
H82.21792.77033.08511.08112.22561.81883.10492.50982.52783.12903.7717
H92.21792.77033.08512.22561.08113.10491.81882.50982.52783.77173.1290
H102.14241.09023.08202.73602.73603.76873.76872.52782.52781.76261.7626
H112.15551.09012.56523.07913.48513.80924.35533.12903.77171.76261.7671
H122.15551.09012.56523.48513.07914.35533.80923.77173.12901.76261.7671

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.180 C1 C2 H11 111.237
C1 C2 H12 111.237 C1 C4 H5 59.885
C1 C4 H6 118.644 C1 C4 H8 117.339
C1 H5 C4 59.885 C1 H5 H7 118.644
C1 H5 H9 117.339 C2 C1 C3 115.075
C2 C1 C4 119.828 C2 C1 H5 119.828
C3 C1 C4 115.481 C3 C1 H5 115.481
C4 C1 H5 60.230 C4 H5 H7 118.030
C4 H5 H9 117.603 H5 C4 H6 118.030
H5 C4 H8 117.603 H6 C4 H8 114.620
H7 H5 H9 114.620 H10 C2 H11 107.880
H10 C2 H12 107.880 H11 C2 H12 108.298
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability