return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: CCSD/6-311G*

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/6-311G*
 hartrees
Energy at 0K-155.472056
Energy at 298.15K 
HF Energy-154.893547
Nuclear repulsion energy107.760744
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/6-311G*
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' 3283 3130 0.03      
2 A' 3129 2983 19.08      
3 A' 3056 2914 67.21      
4 A' 3042 2900 25.05      
5 A' 1866 1779 11.25      
6 A' 1549 1477 4.53      
7 A' 1516 1445 9.27      
8 A' 1441 1374 0.33      
9 A' 1225 1168 2.88      
10 A' 1104 1053 8.20      
11 A' 1083 1033 33.71      
12 A' 994 948 6.52      
13 A' 951 907 15.83      
14 A' 687 655 0.61      
15 A' 326 311 1.68      
16 A" 3123 2977 51.49      
17 A" 3106 2961 20.55      
18 A" 1507 1437 9.54      
19 A" 1130 1078 1.29      
20 A" 1058 1009 0.12      
21 A" 1002 956 1.76      
22 A" 688 656 35.02      
23 A" 291 277 13.89      
24 A" 150 143 0.41      

Unscaled Zero Point Vibrational Energy (zpe) 18652.6 cm-1
Scaled (by 0.9535) Zero Point Vibrational Energy (zpe) 17785.2 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/6-311G*
ABC
0.68382 0.21020 0.17145

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.178 0.000
C2 -0.050 -1.336 0.000
C3 1.158 -0.417 0.000
C4 -0.840 1.402 0.000
H5 -0.324 -1.867 0.916
H6 -0.324 -1.867 -0.916
H7 2.237 -0.369 0.000
H8 -0.222 2.306 0.000
H9 -1.490 1.417 -0.883
H10 -1.490 1.417 0.883

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.51451.30211.48412.26442.26442.30322.13942.12962.1296
C21.51451.51752.84911.09421.09422.48293.64563.22993.2299
C31.30211.51752.70172.26732.26731.08023.05273.34003.3400
C41.48412.84912.70173.43383.43383.55001.09491.09681.0968
H52.26441.09422.26733.43381.83193.10604.27373.92213.4852
H62.26441.09422.26733.43381.83193.10604.27373.48523.9221
H72.30322.48291.08023.55003.10603.10603.63364.22624.2262
H82.13943.64563.05271.09494.27374.27373.63361.78231.7823
H92.12963.22993.34001.09683.92213.48524.22621.78231.7665
H102.12963.22993.34001.09683.48523.92214.22621.78231.7665

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 50.864 H1 C2 C6 119.595
C2 C3 C6 24.806 C2 C3 C10 72.629
C2 C6 C3 35.582 C2 C6 H4 49.595
C2 C6 H5 33.162 C3 C2 C6 119.612
C3 C6 H4 51.784 C3 C6 H5 66.173
C3 C10 H7 9.430 C3 C10 H8 65.097
C3 C10 H9 74.666 H4 C6 H5 74.529
C6 C3 C10 86.540 H7 C10 H8 58.663
H7 C10 H9 77.937 H8 C10 H9 60.294
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability