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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: MP3=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 MP3=FULL/6-31G*
 hartrees
Energy at 0K-156.673754
Energy at 298.15K-156.682433
HF Energy-156.095373
Nuclear repulsion energy124.289578
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 MP3=FULL/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' 3288 3085 24.25      
2 A' 3210 3012 14.01      
3 A' 3202 3004 15.39      
4 A' 3167 2972 18.60      
5 A' 3093 2902 26.31      
6 A' 1584 1486 1.08      
7 A' 1562 1466 7.55      
8 A' 1491 1399 3.55      
9 A' 1452 1362 1.69      
10 A' 1281 1202 0.13      
11 A' 1255 1178 0.06      
12 A' 1118 1049 7.12      
13 A' 1041 976 9.60      
14 A' 975 915 3.25      
15 A' 829 777 4.90      
16 A' 803 753 2.37      
17 A' 376 353 0.20      
18 A" 3276 3073 0.26      
19 A" 3196 2999 18.60      
20 A" 3171 2975 27.37      
21 A" 1554 1458 1.86      
22 A" 1528 1433 2.23      
23 A" 1242 1165 0.50      
24 A" 1199 1125 0.25      
25 A" 1151 1080 4.47      
26 A" 1119 1050 1.52      
27 A" 918 861 7.35      
28 A" 856 803 5.03      
29 A" 351 330 0.68      
30 A" 227 213 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24755.5 cm-1
Scaled (by 0.9383) Zero Point Vibrational Energy (zpe) 23228.1 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 MP3=FULL/6-31G*
ABC
0.52166 0.21192 0.18615

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.347 0.403 0.000
C2 -0.882 1.280 0.000
H3 1.290 0.945 0.000
C4 0.347 -0.898 0.754
C5 0.347 -0.898 -0.754
H6 1.253 -1.202 1.268
H7 1.253 -1.202 -1.268
H8 -0.569 -1.186 1.261
H9 -0.569 -1.186 -1.261
H10 -1.790 0.667 0.000
H11 -0.911 1.921 0.887
H12 -0.911 1.921 -0.887

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.51001.08781.50351.50352.23722.23722.22592.22592.15322.16232.1623
C21.51002.19802.61192.61193.51093.51092.78742.78741.09531.09501.0950
H31.08782.19802.20342.20342.49422.49423.09673.09673.09252.56622.5662
C41.50352.61192.20341.50731.08512.23641.08612.23162.75373.09043.4963
C51.50352.61192.20341.50732.23641.08512.23161.08612.75373.49633.0904
H62.23723.51092.49421.08512.23642.53691.82183.11693.78923.81894.3685
H72.23723.51092.49422.23641.08512.53693.11691.82183.78924.36853.8189
H82.22592.78743.09671.08612.23161.82183.11692.52132.55223.14893.7931
H92.22592.78743.09672.23161.08613.11691.82182.52132.55223.79313.1489
H102.15321.09533.09252.75372.75373.78923.78922.55222.55221.76991.7699
H112.16231.09502.56623.09043.49633.81894.36853.14893.79311.76991.7737
H122.16231.09502.56623.49633.09044.36853.81893.79313.14891.76991.7737

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.463 C1 C2 H11 111.214
C1 C2 H12 111.214 C1 C4 H5 59.917
C1 C4 H6 118.700 C1 C4 H8 117.632
C1 H5 C4 59.917 C1 H5 H7 118.700
C1 H5 H9 117.632 C2 C1 C3 114.602
C2 C1 C4 120.162 C2 C1 H5 120.162
C3 C1 C4 115.553 C3 C1 H5 115.553
C4 C1 H5 60.166 C4 H5 H7 118.322
C4 H5 H9 117.829 H5 C4 H6 118.322
H5 C4 H8 117.829 H6 C4 H8 114.084
H7 H5 H9 114.084 H10 C2 H11 107.818
H10 C2 H12 107.818 H11 C2 H12 108.175
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability