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All results from a given calculation for C4H6 (1-Methylcyclopropene)

using model chemistry: CISD/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at CISD/cc-pVTZ
 hartrees
Energy at 0K-155.513499
Energy at 298.15K 
HF Energy-154.923639
Nuclear repulsion energy109.017886
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 CISD/cc-pVTZ
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' 3396 3158 1.13      
2 A' 3224 2998 16.06      
3 A' 3151 2930 72.42      
4 A' 3137 2917 22.04      
5 A' 1945 1808 14.56      
6 A' 1592 1481 4.69      
7 A' 1547 1439 8.41      
8 A' 1470 1367 0.02      
9 A' 1256 1168 4.01      
10 A' 1148 1067 6.23      
11 A' 1133 1054 32.42      
12 A' 1028 955 6.68      
13 A' 995 925 14.70      
14 A' 716 666 0.67      
15 A' 336 313 1.60      
16 A" 3216 2990 43.80      
17 A" 3201 2976 17.31      
18 A" 1545 1436 7.81      
19 A" 1172 1090 1.88      
20 A" 1104 1027 0.43      
21 A" 1035 963 1.88      
22 A" 789 733 34.48      
23 A" 317 295 12.20      
24 A" 164 152 0.29      

Unscaled Zero Point Vibrational Energy (zpe) 19308.5 cm-1
Scaled (by 0.9298) Zero Point Vibrational Energy (zpe) 17953.0 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 CISD/cc-pVTZ
ABC
0.70106 0.21469 0.17526

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.175 0.000
C2 -0.022 -1.322 0.000
C3 1.151 -0.389 0.000
C4 -0.859 1.371 0.000
H5 -0.283 -1.852 0.905
H6 -0.283 -1.852 -0.905
H7 2.216 -0.323 0.000
H8 -0.269 2.278 0.000
H9 -1.502 1.371 -0.873
H10 -1.502 1.371 0.873

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.49711.28191.47282.23812.23812.27112.12042.10922.1092
C21.49711.49872.82041.08111.08112.45033.60873.19473.1947
C31.28191.49872.67202.23982.23981.06663.02173.30123.3012
C41.47282.82042.67203.39743.39743.51091.08221.08421.0842
H52.23811.08112.23983.39741.81063.06594.22863.87813.4463
H62.23811.08112.23983.39741.81063.06594.22863.44633.8781
H72.27112.45031.06663.51093.06593.06593.59744.17764.1776
H82.12043.60873.02171.08224.22864.22863.59741.76211.7621
H92.10923.19473.30121.08423.87813.44634.17761.76211.7469
H102.10923.19473.30121.08423.44633.87814.17761.76211.7469

picture of 1-Methylcyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 C2 C3 50.666 H1 C2 C6 119.597
C2 C3 C6 24.810 C2 C3 C10 72.726
C2 C6 C3 35.569 C2 C6 H4 49.647
C2 C6 H5 33.137 C3 C2 C6 119.621
C3 C6 H4 51.763 C3 C6 H5 66.160
C3 C10 H7 9.390 C3 C10 H8 65.242
C3 C10 H9 74.658 H4 C6 H5 74.546
C6 C3 C10 86.607 H7 C10 H8 58.849
H7 C10 H9 77.932 H8 C10 H9 60.287
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability