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

using model chemistry: mPW1PW91/6-311+G(3df,2p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at mPW1PW91/6-311+G(3df,2p)
 hartrees
Energy at 0K-155.957523
Energy at 298.15K 
HF Energy-155.957523
Nuclear repulsion energy108.773496
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 mPW1PW91/6-311+G(3df,2p)
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' 3290 3290 0.52 114.85 0.30 0.46
2 A' 3130 3130 15.08 80.55 0.70 0.82
3 A' 3042 3042 19.09 325.96 0.01 0.01
4 A' 3041 3041 84.64 54.15 0.63 0.78
5 A' 1882 1882 15.60 73.92 0.12 0.22
6 A' 1527 1527 4.16 8.39 0.38 0.55
7 A' 1481 1481 11.44 10.37 0.52 0.68
8 A' 1404 1404 0.38 7.52 0.50 0.66
9 A' 1208 1208 2.51 9.83 0.37 0.54
10 A' 1097 1097 8.59 6.92 0.14 0.24
11 A' 1079 1079 29.52 1.40 0.53 0.69
12 A' 991 991 8.08 7.62 0.17 0.30
13 A' 950 950 14.19 4.03 0.47 0.64
14 A' 695 695 1.04 13.80 0.56 0.71
15 A' 325 325 1.98 1.73 0.75 0.86
16 A" 3103 3103 19.21 94.57 0.75 0.86
17 A" 3099 3099 39.20 96.64 0.75 0.86
18 A" 1477 1477 9.40 5.23 0.75 0.86
19 A" 1125 1125 1.19 0.50 0.75 0.86
20 A" 1055 1055 0.28 2.09 0.75 0.86
21 A" 991 991 2.67 0.77 0.75 0.86
22 A" 743 743 34.73 1.67 0.75 0.86
23 A" 303 303 13.48 0.21 0.75 0.86
24 A" 163 163 0.43 0.21 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18600.4 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 18600.4 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 mPW1PW91/6-311+G(3df,2p)
ABC
0.69698 0.21444 0.17495

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-311+G(3df,2p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.178 0.000
C2 -0.032 -1.321 0.000
C3 1.151 -0.400 0.000
C4 -0.846 1.376 0.000
H5 -0.304 -1.855 0.911
H6 -0.304 -1.855 -0.911
H7 2.224 -0.343 0.000
H8 -0.252 2.289 0.000
H9 -1.498 1.383 -0.876
H10 -1.498 1.383 0.876

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.49961.28751.46732.24812.24812.28372.12592.11282.1128
C21.49961.49942.81801.08991.08992.45933.61693.19843.1984
C31.28751.49942.67272.24962.24961.07473.03253.31073.3107
C41.46732.81802.67273.40083.40083.51851.08921.09191.0919
H52.24811.08992.24963.40081.82193.08294.24293.88653.4513
H62.24811.08992.24963.40081.82193.08294.24293.45133.8865
H72.28372.45931.07473.51853.08293.08293.61264.19464.1946
H82.12593.61693.03251.08924.24294.24293.61261.77241.7724
H92.11283.19843.31071.09193.88653.45134.19461.77241.7527
H102.11283.19843.31071.09193.45133.88654.19461.77241.7527

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 50.848 H1 C2 C6 119.648
C2 C3 C6 24.860 C2 C3 C10 72.537
C2 C6 C3 35.333 C2 C6 H4 49.521
C2 C6 H5 33.302 C3 C2 C6 119.807
C3 C6 H4 51.703 C3 C6 H5 66.113
C3 C10 H7 9.410 C3 C10 H8 65.288
C3 C10 H9 74.650 H4 C6 H5 74.463
C6 C3 C10 86.470 H7 C10 H8 58.878
H7 C10 H9 77.940 H8 C10 H9 60.366
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-311+G(3df,2p) Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.158      
2 C -0.539      
3 C -0.007      
4 C -0.369      
5 H 0.121      
6 H 0.121      
7 H 0.153      
8 H 0.113      
9 H 0.124      
10 H 0.124      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.187 0.905 0.000 0.924
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -23.461 -0.665 0.000
y -0.665 -25.146 0.000
z 0.000 0.000 -25.694
Traceless
 xyz
x 1.959 -0.665 0.000
y -0.665 -0.569 0.000
z 0.000 0.000 -1.390
Polar
3z2-r2-2.780
x2-y21.685
xy-0.665
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.528 -0.643 0.000
y -0.643 7.915 0.000
z 0.000 0.000 5.518


<r2> (average value of r2) Å2
<r2> 79.647
(<r2>)1/2 8.925