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All results from a given calculation for C4H6 (Methylenecyclopropane)

using model chemistry: QCISD/3-21G

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/3-21G
 hartrees
Energy at 0K-154.415791
Energy at 298.15K-154.421616
HF Energy-154.015667
Nuclear repulsion energy107.960123
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/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 A1 3137 3040 6.40      
2 A1 3112 3016 13.07      
3 A1 1807 1752 0.11      
4 A1 1542 1495 0.00      
5 A1 1514 1468 0.40      
6 A1 1108 1074 10.57      
7 A1 984 953 1.88      
8 A1 685 663 6.26      
9 A2 3210 3111 0.00      
10 A2 1190 1153 0.00      
11 A2 996 965 0.00      
12 A2 645 625 0.00      
13 B1 3224 3125 14.82      
14 B1 1152 1116 0.21      
15 B1 942 913 40.42      
16 B1 791 767 0.86      
17 B1 315 306 5.43      
18 B2 3185 3087 13.55      
19 B2 3131 3035 9.27      
20 B2 1517 1471 1.00      
21 B2 1179 1143 10.81      
22 B2 1133 1098 3.62      
23 B2 885 858 9.58      
24 B2 373 361 0.60      

Unscaled Zero Point Vibrational Energy (zpe) 18878.3 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 18296.8 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 QCISD/3-21G
ABC
0.62967 0.22434 0.17727

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.653
C2 0.000 0.000 0.326
H3 0.000 0.928 2.226
H4 0.000 -0.928 2.226
C5 0.000 0.790 -0.944
C6 0.000 -0.790 -0.944
H7 0.920 1.286 -1.249
H8 -0.920 1.286 -1.249
H9 -0.920 -1.286 -1.249
H10 0.920 -1.286 -1.249

Atom - Atom Distances (Å)
  C1 C2 H3 H4 C5 C6 H7 H8 H9 H10
C11.32701.09071.09072.71462.71463.30413.30413.30413.3041
C21.32702.11472.11471.49571.49572.23112.23112.23112.2311
H31.09072.11471.85593.17363.60593.61223.61224.22134.2213
H41.09072.11471.85593.60593.17364.22134.22133.61223.6122
C52.71461.49573.17363.60591.57921.08841.08842.29022.2902
C62.71461.49573.60593.17361.57922.29022.29021.08841.0884
H73.30412.23113.61224.22131.08842.29021.83953.16152.5712
H83.30412.23113.61224.22131.08842.29021.83952.57123.1615
H93.30412.23114.22133.61222.29021.08843.16152.57121.8395
H103.30412.23114.22133.61222.29021.08842.57123.16151.8395

picture of Methylenecyclopropane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C5 148.135 C1 C2 C6 148.135
C2 C1 H3 121.708 C2 C1 H4 121.708
C2 C5 C6 58.135 C2 C5 H7 118.554
C2 C5 H8 118.554 C2 C6 C5 58.135
C2 C6 H9 118.554 C2 C6 H10 118.554
H3 C1 H4 116.583 C5 C2 C6 63.730
C5 C6 H9 117.113 C5 C6 H10 117.113
C6 C5 H7 117.113 C6 C5 H8 117.113
H7 C5 H8 115.362 H9 C6 H10 115.362
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability