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

using model chemistry: B2PLYP/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B2PLYP/6-31G*
 hartrees
Energy at 0K-155.745750
Energy at 298.15K 
HF Energy-155.574851
Nuclear repulsion energy108.071091
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 B2PLYP/6-31G*
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' 3317 3149 0.29 111.82 0.30 0.46
2 A' 3161 3000 18.02 82.32 0.73 0.84
3 A' 3080 2923 68.97 151.08 0.11 0.20
4 A' 3073 2917 29.07 131.83 0.02 0.04
5 A' 1874 1779 10.35 38.53 0.21 0.34
6 A' 1575 1495 9.42 16.34 0.40 0.57
7 A' 1533 1455 7.90 23.31 0.70 0.82
8 A' 1451 1378 0.26 15.12 0.62 0.76
9 A' 1224 1162 1.52 3.96 0.38 0.55
10 A' 1114 1058 8.21 1.65 0.25 0.41
11 A' 1093 1038 33.48 0.12 0.42 0.59
12 A' 998 947 3.04 9.89 0.47 0.64
13 A' 964 915 12.84 9.80 0.59 0.74
14 A' 688 653 0.18 15.93 0.59 0.74
15 A' 325 309 1.51 1.41 0.73 0.84
16 A" 3140 2980 51.31 88.57 0.75 0.86
17 A" 3135 2976 26.09 86.81 0.75 0.86
18 A" 1528 1450 7.03 18.36 0.75 0.86
19 A" 1150 1091 0.78 2.46 0.75 0.86
20 A" 1072 1017 0.86 3.83 0.75 0.86
21 A" 1011 960 2.25 13.26 0.75 0.86
22 A" 718 682 27.68 1.15 0.75 0.86
23 A" 295 280 9.96 1.29 0.75 0.86
24 A" 157 149 0.45 0.35 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18837.5 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 17880.5 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 B2PLYP/6-31G*
ABC
0.69021 0.21113 0.17237

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.179 0.000
C2 -0.043 -1.330 0.000
C3 1.156 -0.415 0.000
C4 -0.842 1.395 0.000
H5 -0.321 -1.866 0.911
H6 -0.321 -1.866 -0.911
H7 2.233 -0.365 0.000
H8 -0.233 2.303 0.000
H9 -1.493 1.411 -0.880
H10 -1.493 1.411 0.880

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.50961.29941.47882.26162.26162.29822.13632.12632.1263
C21.50961.50742.83971.09331.09332.47143.63763.22343.2234
C31.29941.50742.69562.26152.26151.07843.05203.33533.3353
C41.47882.83972.69563.42563.42563.54281.09291.09511.0951
H52.26161.09332.26153.42561.82303.09894.26783.91423.4801
H62.26161.09332.26153.42561.82303.09894.26783.48013.9142
H72.29822.47141.07843.54283.09893.09893.63284.22024.2202
H82.13633.63763.05201.09294.26784.26783.63281.77691.7769
H92.12633.22343.33531.09513.91423.48014.22021.77691.7607
H102.12633.22343.33531.09513.48013.91424.22021.77691.7607

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 51.025 H1 C2 C6 119.806
C2 C3 C6 24.757 C2 C3 C10 72.608
C2 C6 C3 35.266 C2 C6 H4 49.486
C2 C6 H5 33.519 C3 C2 C6 119.977
C3 C6 H4 51.795 C3 C6 H5 66.231
C3 C10 H7 9.422 C3 C10 H8 65.228
C3 C10 H9 74.695 H4 C6 H5 74.569
C6 C3 C10 86.513 H7 C10 H8 58.797
H7 C10 H9 77.960 H8 C10 H9 60.303
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.151      
2 C -0.354      
3 C -0.194      
4 C -0.543      
5 H 0.132      
6 H 0.132      
7 H 0.153      
8 H 0.172      
9 H 0.175      
10 H 0.175      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.114 0.861 0.000 0.869
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.367 -0.531 0.011
y -0.531 -25.045 0.004
z 0.011 0.004 -25.348
Traceless
 xyz
x 1.830 -0.531 0.011
y -0.531 -0.688 0.004
z 0.011 0.004 -1.143
Polar
3z2-r2-2.285
x2-y21.679
xy-0.531
xz0.011
yz0.004


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.380 -0.453 -0.002
y -0.453 6.703 -0.001
z -0.002 -0.001 4.144


<r2> (average value of r2) Å2
<r2> 80.439
(<r2>)1/2 8.969