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All results from a given calculation for C4H8 (methylcyclopropane)

using model chemistry: CCD/TZVP

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/TZVP
 hartrees
Energy at 0K-156.786279
Energy at 298.15K-156.794964
HF Energy-156.145732
Nuclear repulsion energy124.432358
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/TZVP
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' 3270 3100 27.08      
2 A' 3193 3027 16.89      
3 A' 3178 3012 11.39      
4 A' 3134 2971 23.86      
5 A' 3060 2901 32.06      
6 A' 1556 1475 1.12      
7 A' 1534 1454 7.08      
8 A' 1463 1387 2.84      
9 A' 1426 1352 2.08      
10 A' 1262 1197 0.07      
11 A' 1239 1175 0.11      
12 A' 1111 1053 7.90      
13 A' 1023 970 7.79      
14 A' 968 918 2.38      
15 A' 820 777 2.49      
16 A' 792 751 5.68      
17 A' 375 355 0.25      
18 A" 3256 3087 0.25      
19 A" 3171 3006 21.48      
20 A" 3133 2970 31.69      
21 A" 1523 1444 1.46      
22 A" 1505 1427 1.86      
23 A" 1234 1170 0.64      
24 A" 1190 1128 0.00      
25 A" 1142 1083 3.53      
26 A" 1122 1064 0.70      
27 A" 896 849 9.89      
28 A" 857 812 5.11      
29 A" 355 336 0.51      
30 A" 221 210 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 24503.7 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 23229.5 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/TZVP
ABC
0.52195 0.21251 0.18673

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.349 0.405 0.000
C2 -0.886 1.275 0.000
H3 1.288 0.946 0.000
C4 0.349 -0.895 0.755
C5 0.349 -0.895 -0.755
H6 1.255 -1.200 1.261
H7 1.255 -1.200 -1.261
H8 -0.568 -1.182 1.255
H9 -0.568 -1.182 -1.255
H10 -1.787 0.656 0.000
H11 -0.917 1.915 0.885
H12 -0.917 1.915 -0.885

Atom - Atom Distances (Å)
  C1 C2 H3 C4 C5 H6 H7 H8 H9 H10 H11 H12
C11.51001.08391.50351.50352.23272.23272.22112.22112.15022.15992.1599
C21.51002.19842.60822.60823.50613.50612.77722.77721.09291.09281.0928
H31.08392.19842.20042.20042.48852.48853.08973.08973.08842.56612.5661
C41.50352.60822.20041.50931.08152.23061.08262.22692.74553.08483.4912
C51.50352.60822.20041.50932.23061.08152.22691.08262.74553.49123.0848
H62.23273.50612.48851.08152.23062.52181.82243.10633.77953.81524.3612
H72.23273.50612.48852.23061.08152.52183.10631.82243.77954.36123.8152
H82.22112.77723.08971.08262.22691.82243.10632.50922.53803.13863.7807
H92.22112.77723.08972.22691.08263.10631.82242.50922.53803.78073.1386
H102.15021.09293.08842.74552.74553.77953.77952.53802.53801.76741.7674
H112.15991.09282.56613.08483.49123.81524.36123.13863.78071.76741.7705
H122.15991.09282.56613.49123.08484.36123.81523.78073.13861.76741.7705

picture of methylcyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H10 110.365 C1 C2 H11 111.150
C1 C2 H12 111.150 C1 C4 H5 59.871
C1 C4 H6 118.563 C1 C4 H8 117.455
C1 H5 C4 59.871 C1 H5 H7 118.563
C1 H5 H9 117.455 C2 C1 C3 114.894
C2 C1 C4 119.886 C2 C1 H5 119.886
C3 C1 C4 115.564 C3 C1 H5 115.564
C4 C1 H5 60.258 C4 H5 H7 117.911
C4 H5 H9 117.503 H5 C4 H6 117.911
H5 C4 H8 117.503 H6 C4 H8 114.736
H7 H5 H9 114.736 H10 C2 H11 107.920
H10 C2 H12 107.920 H11 C2 H12 108.210
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability