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

using model chemistry: B2PLYP=FULL/3-21G

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=FULL/3-21G
 hartrees
Energy at 0K-154.829489
Energy at 298.15K 
HF Energy-154.704909
Nuclear repulsion energy107.396016
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=FULL/3-21G
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' 3337 3177 0.10 92.83 0.29 0.45
2 A' 3145 2994 13.83 76.94 0.73 0.84
3 A' 3121 2971 42.26 104.59 0.14 0.25
4 A' 3067 2919 17.01 138.75 0.01 0.02
5 A' 1820 1732 8.64 28.18 0.21 0.34
6 A' 1583 1507 5.16 15.07 0.44 0.61
7 A' 1571 1496 9.63 29.38 0.71 0.83
8 A' 1481 1410 1.20 19.88 0.56 0.72
9 A' 1196 1139 6.09 1.82 0.32 0.49
10 A' 1118 1064 3.44 1.28 0.28 0.43
11 A' 1086 1034 54.55 0.86 0.59 0.74
12 A' 973 926 2.21 8.55 0.72 0.84
13 A' 934 889 6.35 12.50 0.37 0.53
14 A' 629 599 0.11 15.10 0.62 0.76
15 A' 327 311 1.95 1.75 0.71 0.83
16 A" 3200 3046 42.09 75.06 0.75 0.86
17 A" 3119 2969 11.87 79.85 0.75 0.86
18 A" 1568 1493 8.56 22.67 0.75 0.86
19 A" 1147 1092 0.01 2.29 0.75 0.86
20 A" 1092 1040 3.47 4.69 0.75 0.86
21 A" 1028 978 2.76 15.49 0.75 0.86
22 A" 765 729 39.49 1.25 0.75 0.86
23 A" 304 290 14.51 1.59 0.75 0.86
24 A" 144 137 0.42 0.35 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 18876.9 cm-1
Scaled (by 0.952) Zero Point Vibrational Energy (zpe) 17970.8 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=FULL/3-21G
ABC
0.67526 0.20908 0.17018

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.181 0.000
C2 -0.092 -1.355 0.000
C3 1.147 -0.441 0.000
C4 -0.796 1.430 0.000
H5 -0.371 -1.866 0.917
H6 -0.371 -1.866 -0.917
H7 2.217 -0.405 0.000
H8 -0.146 2.308 0.000
H9 -1.443 1.469 -0.883
H10 -1.443 1.469 0.883

Atom - Atom Distances (Å)
  C1 C2 C3 C4 H5 H6 H7 H8 H9 H10
C11.53871.30471.48082.27332.27332.29332.13252.12602.1260
C21.53871.53972.87231.08611.08612.49683.66383.25253.2525
C31.30471.53972.69692.27552.27551.07073.03793.33663.3366
C41.48082.87232.69693.44693.44693.52771.09311.09541.0954
H52.27331.08612.27553.44691.83323.11074.27983.93793.5027
H62.27331.08612.27553.44691.83323.11074.27983.50273.9379
H72.29332.49681.07073.52773.11073.11073.59804.20554.2055
H82.13253.66383.03791.09314.27984.27983.59801.77971.7797
H92.12603.25253.33661.09543.93793.50274.20551.77971.7663
H102.12603.25253.33661.09543.50273.93794.20551.77971.7663

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 50.152 H1 C2 C6 119.010
C2 C3 C6 24.643 C2 C3 C10 73.460
C2 C6 C3 36.237 C2 C6 H4 50.020
C2 C6 H5 32.436 C3 C2 C6 119.120
C3 C6 H4 51.404 C3 C6 H5 66.245
C3 C10 H7 9.582 C3 C10 H8 64.720
C3 C10 H9 74.652 H4 C6 H5 74.578
C6 C3 C10 86.965 H7 C10 H8 58.111
H7 C10 H9 77.878 H8 C10 H9 60.249
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability