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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: MP2=FULL/STO-3G

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/STO-3G
 hartrees
Energy at 0K-154.462278
Energy at 298.15K-154.470785
HF Energy-154.245698
Nuclear repulsion energy122.211441
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/STO-3G
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' 3613 3211 0.26      
2 A' 3552 3157 2.48      
3 A' 3505 3115 1.46      
4 A' 3461 3077 0.55      
5 A' 3369 2994 4.13      
6 A' 1736 1543 1.28      
7 A' 1690 1502 0.15      
8 A' 1626 1445 1.76      
9 A' 1559 1386 7.17      
10 A' 1355 1205 0.62      
11 A' 1327 1180 0.89      
12 A' 1272 1131 0.34      
13 A' 1114 990 1.08      
14 A' 1044 928 2.41      
15 A' 887 788 1.50      
16 A' 858 763 0.05      
17 A' 381 339 0.14      
18 A" 3608 3207 0.00      
19 A" 3544 3150 2.69      
20 A" 3452 3068 0.95      
21 A" 1729 1537 0.58      
22 A" 1643 1461 0.20      
23 A" 1334 1186 0.25      
24 A" 1313 1168 1.19      
25 A" 1252 1113 0.28      
26 A" 1232 1095 3.13      
27 A" 1017 904 1.08      
28 A" 908 807 1.37      
29 A" 363 323 0.25      
30 A" 196 174 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 26969.1 cm-1
Scaled (by 0.8889) Zero Point Vibrational Energy (zpe) 23972.9 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/STO-3G
ABC
0.50690 0.20344 0.17909

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/STO-3G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.353 0.410 0.000
C2 -0.902 1.310 0.000
H3 1.307 0.961 0.000
C4 0.353 -0.918 0.765
C5 0.353 -0.918 -0.765
H6 1.272 -1.219 1.285
H7 1.272 -1.219 -1.285
H8 -0.572 -1.217 1.275
H9 -0.572 -1.217 -1.275
H10 -1.819 0.696 0.000
H11 -0.919 1.958 0.894
H12 -0.919 1.958 -0.894

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.54441.10111.53261.53262.26882.26882.26432.26432.19132.19432.1943
C21.54442.23572.66912.66913.57363.57362.84882.84881.10351.10441.1044
H31.10112.23572.24182.24182.53062.53063.14603.14603.13692.59742.5974
C41.53262.66912.24181.53001.09782.26661.09802.25982.81263.14753.5557
C51.53262.66912.24181.53002.26661.09782.25981.09802.81263.55573.1475
H62.26883.57362.53061.09782.26662.57001.84453.15523.85673.87874.4318
H72.26883.57362.53062.26661.09782.57003.15521.84453.85674.43183.8787
H82.26432.84883.14601.09802.25981.84453.15522.54982.61503.21583.8602
H92.26432.84883.14602.25981.09803.15521.84452.54982.61503.86023.2158
H102.19131.10353.13692.81262.81263.85673.85672.61502.61501.78911.7891
H112.19431.10442.59743.14753.55573.87874.43183.21583.86021.78911.7883
H122.19431.10442.59743.55573.14754.43183.87873.86023.21581.78911.7883

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.589 C1 C2 H11 110.770
C1 C2 H12 110.770 C1 C4 H5 60.057
C1 C4 H6 118.264 C1 C4 H8 117.859
C1 H5 C4 60.057 C1 H5 H7 118.264
C1 H5 H9 117.859 C2 C1 C3 114.323
C2 C1 C4 120.316 C2 C1 H5 120.316
C3 C1 C4 115.715 C3 C1 H5 115.715
C4 C1 H5 59.887 C4 H5 H7 118.272
C4 H5 H9 117.670 H5 C4 H6 118.272
H5 C4 H8 117.670 H6 C4 H8 114.286
H7 H5 H9 114.286 H10 C2 H11 108.252
H10 C2 H12 108.252 H11 C2 H12 108.113
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability