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

using model chemistry: CCSD/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at CCSD/TZVP
 hartrees
Energy at 0K-155.526484
Energy at 298.15K 
HF Energy-154.916550
Nuclear repulsion energy108.234293
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 CCSD/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' 3328 3176 0.17      
2 A' 3150 3006 19.40      
3 A' 3084 2943 67.13      
4 A' 3064 2924 26.61      
5 A' 1877 1792 13.89      
6 A' 1563 1492 6.15      
7 A' 1515 1446 7.36      
8 A' 1440 1374 0.13      
9 A' 1221 1165 3.36      
10 A' 1108 1058 1.32      
11 A' 1101 1051 38.80      
12 A' 995 949 3.90      
13 A' 959 915 12.87      
14 A' 684 653 0.61      
15 A' 330 315 1.34      
16 A" 3149 3006 46.41      
17 A" 3129 2986 19.01      
18 A" 1501 1433 7.82      
19 A" 1145 1092 2.92      
20 A" 1060 1012 0.08      
21 A" 1004 958 1.03      
22 A" 654 624 35.72      
23 A" 271 259 13.52      
24 A" 148 141 0.51      

Unscaled Zero Point Vibrational Energy (zpe) 18739.3 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 17884.8 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 CCSD/TZVP
ABC
0.68985 0.21195 0.17293

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.176 0.000
C2 -0.042 -1.331 0.000
C3 1.155 -0.408 0.000
C4 -0.844 1.392 0.000
H5 -0.312 -1.860 0.913
H6 -0.312 -1.860 -0.913
H7 2.228 -0.356 0.000
H8 -0.233 2.295 0.000
H9 -1.490 1.403 -0.881
H10 -1.490 1.403 0.881

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.50731.29411.48022.25322.25322.29042.13202.12172.1217
C21.50731.51112.83821.08921.08922.47033.63103.21623.2162
C31.29411.51112.69002.25702.25701.07433.03883.32433.3243
C41.48022.83822.69003.41933.41933.53451.09091.09271.0927
H52.25321.08922.25703.41931.82523.09014.25543.90533.4690
H62.25321.08922.25703.41931.82523.09014.25543.46903.9053
H72.29042.47031.07433.53453.09013.09013.61724.20614.2061
H82.13203.63103.03881.09094.25544.25543.61721.77601.7760
H92.12173.21623.32431.09273.90533.46904.20611.77601.7628
H102.12173.21623.32431.09273.46903.90534.20611.77601.7628

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 50.777 H1 C2 C6 119.537
C2 C3 C6 24.820 C2 C3 C10 72.685
C2 C6 C3 35.614 C2 C6 H4 49.649
C2 C6 H5 33.088 C3 C2 C6 119.566
C3 C6 H4 51.778 C3 C6 H5 66.150
C3 C10 H7 9.411 C3 C10 H8 65.106
C3 C10 H9 74.625 H4 C6 H5 74.521
C6 C3 C10 86.587 H7 C10 H8 58.701
H7 C10 H9 77.904 H8 C10 H9 60.246
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability