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

using model chemistry: CISD/Def2TZVPP

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/Def2TZVPP
 hartrees
Energy at 0K-155.516644
Energy at 298.15K 
HF Energy-154.928205
Nuclear repulsion energy109.035741
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/Def2TZVPP
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' 3398 3398 1.26      
2 A' 3227 3227 15.56      
3 A' 3152 3152 71.77      
4 A' 3139 3139 21.96      
5 A' 1945 1945 15.31      
6 A' 1596 1596 4.43      
7 A' 1547 1547 8.72      
8 A' 1471 1471 0.02      
9 A' 1255 1255 4.20      
10 A' 1147 1147 6.24      
11 A' 1137 1137 31.73      
12 A' 1027 1027 6.86      
13 A' 993 993 14.34      
14 A' 716 716 0.74      
15 A' 335 335 1.63      
16 A" 3217 3217 41.14      
17 A" 3204 3204 16.58      
18 A" 1545 1545 8.08      
19 A" 1174 1174 2.05      
20 A" 1105 1105 0.37      
21 A" 1036 1036 1.84      
22 A" 796 796 37.22      
23 A" 317 317 12.81      
24 A" 166 166 0.31      

Unscaled Zero Point Vibrational Energy (zpe) 19323.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 19323.4 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/Def2TZVPP
ABC
0.70108 0.21480 0.17533

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/Def2TZVPP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.175 0.000
C2 -0.020 -1.322 0.000
C3 1.152 -0.388 0.000
C4 -0.861 1.370 0.000
H5 -0.282 -1.852 0.905
H6 -0.282 -1.852 -0.905
H7 2.216 -0.321 0.000
H8 -0.271 2.277 0.000
H9 -1.503 1.368 -0.874
H10 -1.503 1.368 0.874

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.49641.28181.47272.23752.23752.27102.12012.10862.1086
C21.49641.49822.81961.08121.08122.45033.60773.19333.1933
C31.28181.49822.67192.24032.24031.06693.02143.30063.3006
C41.47272.81962.67193.39623.39623.51071.08221.08421.0842
H52.23751.08122.24033.39621.80973.06734.22753.87603.4441
H62.23751.08122.24033.39621.80973.06734.22753.44413.8760
H72.27102.45031.06693.51073.06733.06733.59684.17704.1770
H82.12013.60773.02141.08224.22754.22753.59681.76241.7624
H92.10863.19333.30061.08423.87603.44414.17701.76241.7471
H102.10863.19333.30061.08423.44413.87604.17701.76241.7471

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 50.684 H1 C2 C6 119.599
C2 C3 C6 24.786 C2 C3 C10 72.697
C2 C6 C3 35.515 C2 C6 H4 49.668
C2 C6 H5 33.187 C3 C2 C6 119.699
C3 C6 H4 51.783 C3 C6 H5 66.178
C3 C10 H7 9.398 C3 C10 H8 65.248
C3 C10 H9 74.653 H4 C6 H5 74.548
C6 C3 C10 86.554 H7 C10 H8 58.849
H7 C10 H9 77.928 H8 C10 H9 60.287
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability