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All results from a given calculation for C4H6 (Methylenecyclopropane)

using model chemistry: QCISD/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/cc-pVTZ
 hartrees
Energy at 0K-155.633897
Energy at 298.15K-155.639702
HF Energy-154.942359
Nuclear repulsion energy109.389385
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 QCISD/cc-pVTZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3156 3015 10.47      
2 A1 3148 3008 9.55      
3 A1 1855 1773 3.69      
4 A1 1511 1443 0.40      
5 A1 1466 1401 0.54      
6 A1 1075 1027 2.01      
7 A1 1060 1013 4.75      
8 A1 752 718 5.67      
9 A2 3224 3080 0.00      
10 A2 1188 1135 0.00      
11 A2 968 925 0.00      
12 A2 630 602 0.00      
13 B1 3236 3092 12.46      
14 B1 1113 1064 2.53      
15 B1 935 893 39.87      
16 B1 765 731 1.17      
17 B1 293 280 4.40      
18 B2 3239 3095 9.08      
19 B2 3144 3004 12.96      
20 B2 1471 1406 1.55      
21 B2 1163 1111 6.13      
22 B2 1094 1046 1.16      
23 B2 920 879 14.34      
24 B2 356 341 0.23      

Unscaled Zero Point Vibrational Energy (zpe) 18881.2 cm-1
Scaled (by 0.9555) Zero Point Vibrational Energy (zpe) 18041.0 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 QCISD/cc-pVTZ
ABC
0.65407 0.22913 0.18199

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/cc-pVTZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.652
C2 0.000 0.000 0.307
H3 0.000 0.895 2.170
H4 0.000 -0.895 2.170
C5 0.000 0.747 -0.893
C6 0.000 -0.747 -0.893
H7 0.917 0.927 -1.345
H8 -0.917 0.927 -1.345
H9 -0.917 -0.927 -1.345
H10 0.917 -0.927 -1.345

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 H7 H8 H9 H10
C11.34491.03431.03432.65182.65183.26853.26853.26853.2685
C21.34492.06722.06721.41321.41322.10492.10492.10492.1049
H31.03432.06721.78983.06663.47533.63333.63334.06454.0645
H41.03432.06721.78983.47533.06664.06454.06453.63333.6333
C52.65181.41323.06663.47531.49401.03871.03871.96211.9621
C62.65181.41323.47533.06661.49401.96211.96211.03871.0387
H73.26852.10493.63334.06451.03871.96211.83502.60891.8545
H83.26852.10493.63334.06451.03871.96211.83501.85452.6089
H93.26852.10494.06453.63331.96211.03872.60891.85451.8350
H103.26852.10494.06453.63331.96211.03871.85452.60891.8350

picture of Methylenecyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 148.088 C1 C2 C6 148.088
C2 C1 H3 120.091 C2 C1 H4 120.091
C2 C5 C6 58.088 C2 C5 H7 117.481
C2 C5 H8 117.481 C2 C6 C5 58.088
C2 C6 H9 117.481 C2 C6 H10 117.481
H3 C1 H4 119.817 C5 C2 C6 63.824
C5 C6 H9 99.993 C5 C6 H10 99.993
C6 C5 H7 99.993 C6 C5 H8 99.993
H7 C5 H8 124.080 H9 C6 H10 124.080
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability