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: 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-26.121594
Energy at 298.15K 
HF Energy-26.121594
Nuclear repulsion energy57.735790
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' 3233 3134 1.52 134.65 0.32 0.48
2 A' 3094 2999 29.60 99.65 0.72 0.84
3 A' 3010 2917 32.19 245.95 0.01 0.02
4 A' 2999 2907 111.13 136.85 0.22 0.36
5 A' 1821 1766 15.26 61.65 0.18 0.31
6 A' 1523 1476 9.88 15.95 0.32 0.48
7 A' 1491 1445 8.94 18.32 0.62 0.77
8 A' 1407 1364 0.35 10.00 0.65 0.79
9 A' 1171 1135 2.30 6.58 0.37 0.55
10 A' 1065 1032 7.35 3.49 0.17 0.29
11 A' 1047 1015 38.53 0.40 0.68 0.81
12 A' 958 929 3.58 11.76 0.37 0.54
13 A' 928 900 14.66 8.46 0.48 0.65
14 A' 659 639 0.31 17.14 0.59 0.75
15 A' 311 301 1.94 1.73 0.74 0.85
16 A" 3066 2972 0.84 93.27 0.75 0.86
17 A" 3063 2969 104.52 124.15 0.75 0.86
18 A" 1487 1441 8.37 13.35 0.75 0.86
19 A" 1106 1072 0.75 1.74 0.75 0.86
20 A" 1039 1007 0.25 3.18 0.75 0.86
21 A" 981 951 2.28 8.82 0.75 0.86
22 A" 710 688 38.39 1.10 0.75 0.86
23 A" 293 284 13.75 1.14 0.75 0.86
24 A" 156 151 0.31 0.45 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18307.6 cm-1
Scaled (by 0.9694) Zero Point Vibrational Energy (zpe) 17747.4 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 B3LYP/CEP-121G*
ABC
0.67823 0.20771 0.16946

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 0.180 0.000
C2 -0.032 -1.346 0.000
C3 1.167 -0.404 0.000
C4 -0.862 1.400 0.000
H5 -0.303 -1.885 0.917
H6 -0.303 -1.885 -0.917
H7 2.250 -0.339 0.000
H8 -0.259 2.316 0.000
H9 -1.515 1.407 -0.884
H10 -1.515 1.407 0.884

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.52601.30511.49402.27952.27952.30852.15242.14112.1411
C21.52601.52512.86891.09791.09792.49353.66953.25023.2502
C31.30511.52512.71492.27992.27991.08403.07143.35523.3552
C41.49402.86892.71493.45633.45633.56421.09671.09901.0990
H52.27951.09792.27993.45631.83433.12204.30073.94383.5088
H62.27951.09792.27993.45631.83433.12204.30073.50883.9438
H72.30852.49351.08403.56423.12203.12203.65284.24314.2431
H82.15243.66953.07141.09674.30074.30073.65281.78461.7846
H92.14113.25023.35521.09903.94383.50884.24311.78461.7671
H102.14113.25023.35521.09903.50883.94384.24311.78461.7671

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 50.647 H1 C2 C6 119.735
C2 C3 C6 24.687 C2 C3 C10 72.840
C2 C6 C3 35.464 C2 C6 H4 49.580
C2 C6 H5 33.344 C3 C2 C6 119.848
C3 C6 H4 51.675 C3 C6 H5 66.280
C3 C10 H7 9.455 C3 C10 H8 65.275
C3 C10 H9 74.732 H4 C6 H5 74.612
C6 C3 C10 86.620 H7 C10 H8 58.800
H7 C10 H9 77.981 H8 C10 H9 60.324
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 0.246      
2 C -0.414      
3 C -0.302      
4 C -0.559      
5 H 0.139      
6 H 0.139      
7 H 0.216      
8 H 0.178      
9 H 0.180      
10 H 0.180      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.177 0.881 0.000 0.899
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.567 -0.561 0.000
y -0.561 -25.242 0.000
z 0.000 0.000 -25.722
Traceless
 xyz
x 1.915 -0.561 0.000
y -0.561 -0.597 0.000
z 0.000 0.000 -1.318
Polar
3z2-r2-2.635
x2-y21.675
xy-0.561
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.381 -0.512 0.000
y -0.512 7.786 0.000
z 0.000 0.000 4.929


<r2> (average value of r2) Å2
<r2> 69.508
(<r2>)1/2 8.337