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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: CCD/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 CCD/6-31G
 hartrees
Energy at 0K-156.438003
Energy at 298.15K-156.446671
HF Energy-156.026124
Nuclear repulsion energy122.678558
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/6-31G
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' 3222 3092 35.14      
2 A' 3143 3016 9.39      
3 A' 3135 3008 20.56      
4 A' 3075 2951 27.12      
5 A' 3006 2884 30.95      
6 A' 1559 1496 1.80      
7 A' 1556 1493 5.84      
8 A' 1476 1416 3.88      
9 A' 1448 1389 0.94      
10 A' 1258 1207 0.05      
11 A' 1245 1194 0.03      
12 A' 1148 1101 13.33      
13 A' 1018 977 3.88      
14 A' 970 931 5.89      
15 A' 826 793 1.37      
16 A' 779 748 6.92      
17 A' 378 362 0.15      
18 A" 3207 3077 0.26      
19 A" 3129 3002 20.56      
20 A" 3081 2956 35.23      
21 A" 1549 1486 1.52      
22 A" 1531 1469 2.92      
23 A" 1244 1194 0.32      
24 A" 1214 1164 0.53      
25 A" 1158 1111 5.14      
26 A" 1148 1102 1.54      
27 A" 883 847 0.44      
28 A" 863 828 13.69      
29 A" 352 338 0.78      
30 A" 216 207 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24408.1 cm-1
Scaled (by 0.9595) Zero Point Vibrational Energy (zpe) 23419.6 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 CCD/6-31G
ABC
0.50889 0.20587 0.18042

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.349 0.408 0.000
C2 -0.887 1.306 0.000
H3 1.296 0.956 0.000
C4 0.349 -0.915 0.766
C5 0.349 -0.915 -0.766
H6 1.257 -1.222 1.288
H7 1.257 -1.222 -1.288
H8 -0.570 -1.206 1.280
H9 -0.570 -1.206 -1.280
H10 -1.807 0.695 0.000
H11 -0.909 1.952 0.894
H12 -0.909 1.952 -0.894

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.52761.09401.52931.52932.26722.26722.25562.25562.17502.18252.1825
C21.52762.21122.65482.65483.55603.55602.83662.83661.10451.10341.1034
H31.09402.21122.23252.23252.53002.53003.12933.12933.11432.57932.5793
C41.52932.65482.23251.53211.09122.26641.09232.26152.79783.13333.5438
C51.52932.65482.23251.53212.26641.09122.26151.09232.79783.54383.1333
H62.26723.55602.53001.09122.26642.57541.82743.15133.83683.86214.4185
H72.26723.55602.53002.26641.09122.57543.15131.82743.83684.41853.8621
H82.25562.83663.12931.09232.26151.82743.15132.55942.60383.19893.8485
H92.25562.83663.12932.26151.09233.15131.82742.55942.60383.84853.1989
H102.17501.10453.11432.79782.79783.83683.83682.60382.60381.78541.7854
H112.18251.10342.57933.13333.54383.86214.41853.19893.84851.78541.7887
H122.18251.10342.57933.54383.13334.41853.86213.84853.19891.78541.7887

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.423 C1 C2 H11 111.075
C1 C2 H12 111.075 C1 C4 H5 59.940
C1 C4 H6 118.855 C1 C4 H8 117.756
C1 H5 C4 59.940 C1 H5 H7 118.855
C1 H5 H9 117.756 C2 C1 C3 113.997
C2 C1 C4 120.567 C2 C1 H5 120.567
C3 C1 C4 115.657 C3 C1 H5 115.657
C4 C1 H5 60.120 C4 H5 H7 118.559
C4 H5 H9 118.054 H5 C4 H6 118.559
H5 C4 H8 118.054 H6 C4 H8 113.626
H7 H5 H9 113.626 H10 C2 H11 107.926
H10 C2 H12 107.926 H11 C2 H12 108.294
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability