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: CCD/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at CCD/aug-cc-pVDZ
 hartrees
Energy at 0K-155.484105
Energy at 298.15K 
HF Energy-154.882661
Nuclear repulsion energy107.120865
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/aug-cc-pVDZ
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' 3301 3184 0.11      
2 A' 3138 3026 17.38      
3 A' 3067 2959 68.28      
4 A' 3045 2937 25.50      
5 A' 1863 1797 12.56      
6 A' 1524 1470 4.61      
7 A' 1480 1427 7.65      
8 A' 1404 1354 0.11      
9 A' 1206 1164 3.39      
10 A' 1089 1050 6.15      
11 A' 1068 1030 24.11      
12 A' 988 953 6.68      
13 A' 942 908 12.25      
14 A' 678 654 0.66      
15 A' 320 309 1.40      
16 A" 3140 3028 42.96      
17 A" 3117 3006 16.11      
18 A" 1475 1423 6.94      
19 A" 1108 1068 1.96      
20 A" 1043 1006 0.01      
21 A" 990 955 1.52      
22 A" 690 666 33.32      
23 A" 277 267 12.60      
24 A" 161 155 0.30      

Unscaled Zero Point Vibrational Energy (zpe) 18556.1 cm-1
Scaled (by 0.9645) Zero Point Vibrational Energy (zpe) 17897.4 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 CCD/aug-cc-pVDZ
ABC
0.67508 0.20789 0.16953

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.180 0.000
C2 -0.058 -1.342 0.000
C3 1.163 -0.426 0.000
C4 -0.837 1.414 0.000
H5 -0.336 -1.875 0.922
H6 -0.336 -1.875 -0.922
H7 2.250 -0.385 0.000
H8 -0.207 2.319 0.000
H9 -1.489 1.432 -0.890
H10 -1.489 1.432 0.890

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.52321.31151.49152.27682.27682.31952.14922.13982.1398
C21.52321.52742.86441.10061.10062.49883.66423.24613.2461
C31.31151.52742.71792.28002.28001.08713.06793.35873.3587
C41.49152.86442.71793.45223.45223.57281.10211.10371.1037
H52.27681.10062.28003.45221.84493.12354.29553.94323.5020
H62.27681.10062.28003.45221.84493.12354.29553.50203.9432
H72.31952.49881.08713.57283.12353.12353.65354.25144.2514
H82.14923.66423.06791.10214.29554.29553.65351.79491.7949
H92.13983.24613.35871.10373.94323.50204.25141.79491.7803
H102.13983.24613.35871.10373.50203.94324.25141.79491.7803

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 50.927 H1 C2 C6 119.527
C2 C3 C6 24.850 C2 C3 C10 72.552
C2 C6 C3 35.677 C2 C6 H4 49.610
C2 C6 H5 33.053 C3 C2 C6 119.474
C3 C6 H4 51.828 C3 C6 H5 66.134
C3 C10 H7 9.417 C3 C10 H8 65.027
C3 C10 H9 74.631 H4 C6 H5 74.502
C6 C3 C10 86.518 H7 C10 H8 58.617
H7 C10 H9 77.914 H8 C10 H9 60.269
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability