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

using model chemistry: B3LYP/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B3LYP/CEP-121G
 hartrees
Energy at 0K-26.072180
Energy at 298.15K 
HF Energy-26.072180
Nuclear repulsion energy57.322422
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 B3LYP/CEP-121G
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' 3246 3163 0.93 129.95 0.31 0.47
2 A' 3080 3002 33.48 100.11 0.73 0.84
3 A' 3008 2932 84.15 162.59 0.16 0.27
4 A' 2981 2905 44.65 224.96 0.02 0.03
5 A' 1804 1758 14.18 61.83 0.16 0.28
6 A' 1520 1482 5.52 16.21 0.34 0.50
7 A' 1504 1466 10.74 22.31 0.64 0.78
8 A' 1428 1391 0.74 12.89 0.62 0.76
9 A' 1167 1137 6.13 5.60 0.39 0.56
10 A' 1079 1052 7.71 2.62 0.21 0.35
11 A' 1062 1035 49.21 2.08 0.31 0.47
12 A' 957 933 1.01 13.02 0.32 0.48
13 A' 933 909 14.54 11.82 0.42 0.59
14 A' 636 620 0.27 18.52 0.61 0.76
15 A' 316 308 2.12 1.85 0.73 0.85
16 A" 3094 3015 74.45 109.84 0.75 0.86
17 A" 3052 2974 30.46 96.78 0.75 0.86
18 A" 1500 1461 11.08 16.98 0.75 0.86
19 A" 1105 1077 0.03 1.49 0.75 0.86
20 A" 1048 1021 1.23 3.54 0.75 0.86
21 A" 983 957 2.57 11.05 0.75 0.86
22 A" 730 711 51.24 1.54 0.75 0.86
23 A" 294 287 17.00 1.60 0.75 0.86
24 A" 145 141 0.35 0.46 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18335.9 cm-1
Scaled (by 0.9745) Zero Point Vibrational Energy (zpe) 17868.3 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 B3LYP/CEP-121G
ABC
0.66419 0.20463 0.16654

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.186 0.000
C2 -0.070 -1.366 0.000
C3 1.169 -0.431 0.000
C4 -0.830 1.431 0.000
H5 -0.348 -1.894 0.917
H6 -0.348 -1.894 -0.917
H7 2.248 -0.387 0.000
H8 -0.202 2.331 0.000
H9 -1.483 1.460 -0.884
H10 -1.483 1.460 0.884

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.55361.32161.49622.30012.30012.31962.15402.14552.1455
C21.55361.55222.89851.09461.09462.51603.69903.28093.2809
C31.32161.55222.73142.29912.29911.07983.08263.37453.3745
C41.49622.89852.73143.48293.48293.57431.09721.09961.0996
H52.30011.09462.29913.48291.83453.13934.32583.97263.5409
H62.30011.09462.29913.48291.83453.13934.32583.54093.9726
H72.31962.51601.07983.57433.13933.13933.65834.25554.2555
H82.15403.69903.08261.09724.32584.32583.65831.78371.7837
H92.14553.28093.37451.09963.97263.54094.25551.78371.7683
H102.14553.28093.37451.09963.54093.97264.25551.78371.7683

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 50.367 H1 C2 C6 119.573
C2 C3 C6 24.451 C2 C3 C10 73.173
C2 C6 C3 35.943 C2 C6 H4 49.740
C2 C6 H5 33.069 C3 C2 C6 119.606
C3 C6 H4 51.562 C3 C6 H5 66.487
C3 C10 H7 9.452 C3 C10 H8 65.112
C3 C10 H9 74.811 H4 C6 H5 74.731
C6 C3 C10 86.706 H7 C10 H8 58.609
H7 C10 H9 78.009 H8 C10 H9 60.285
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.267      
2 C -0.390      
3 C -0.262      
4 C -0.554      
5 H 0.127      
6 H 0.127      
7 H 0.191      
8 H 0.163      
9 H 0.166      
10 H 0.166      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.217 0.901 0.000 0.927
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.872 -0.523 0.000
y -0.523 -25.210 0.000
z 0.000 0.000 -25.909
Traceless
 xyz
x 1.687 -0.523 0.000
y -0.523 -0.319 0.000
z 0.000 0.000 -1.368
Polar
3z2-r2-2.736
x2-y21.338
xy-0.523
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.311 -0.495 0.000
y -0.495 7.731 0.000
z 0.000 0.000 4.799


<r2> (average value of r2) Å2
<r2> 70.388
(<r2>)1/2 8.390