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All results from a given calculation for C6H4 (Benzyne)

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-228.684433
Energy at 298.15K-228.687633
Nuclear repulsion energy185.448552
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 3196 3072 2.90      
2 A1 3167 3044 4.42      
3 A1 1907 1833 8.43      
4 A1 1481 1423 1.63      
5 A1 1289 1239 1.87      
6 A1 1175 1129 0.14      
7 A1 1011 971 15.96      
8 A1 983 945 3.00      
9 A1 642 617 0.00      
10 A2 935 899 0.00      
11 A2 859 825 0.00      
12 A2 625 601 0.00      
13 A2 469 451 0.00      
14 B1 914 878 0.01      
15 B1 744 715 84.01      
16 B1 397 381 6.07      
17 B2 3192 3068 23.76      
18 B2 3150 3027 1.19      
19 B2 1488 1430 12.32      
20 B2 1430 1374 3.31      
21 B2 1261 1212 1.04      
22 B2 1117 1073 0.09      
23 B2 911 875 25.54      
24 B2 570 548 41.18      

Unscaled Zero Point Vibrational Energy (zpe) 16455.7 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 15815.6 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
0.22713 0.18743 0.10269

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 0.633 -1.260
C2 0.000 -0.633 -1.260
C3 0.000 1.470 -0.128
C4 0.000 -1.470 -0.128
C5 0.000 0.714 1.072
C6 0.000 -0.714 1.072
H7 0.000 2.556 -0.134
H8 0.000 -2.556 -0.134
H9 0.000 1.239 2.027
H10 0.000 -1.239 2.027

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 H7 H8 H9 H10
C11.26571.40762.38772.33362.69322.22883.38203.34273.7830
C21.26572.38771.40762.69322.33363.38202.22883.78303.3427
C31.40762.38772.93911.41832.49171.08654.02562.16753.4617
C42.38771.40762.93912.49171.41834.02561.08653.46172.1675
C52.33362.69321.41832.49171.42802.20173.48531.09002.1744
C62.69322.33362.49171.41831.42803.48532.20172.17441.0900
H72.22883.38201.08654.02562.20173.48535.11212.53044.3675
H83.38202.22884.02561.08653.48532.20175.11214.36752.5304
H93.34273.78302.16753.46171.09002.17442.53044.36752.4789
H103.78303.34273.46172.16752.17441.09004.36752.53042.4789

picture of Benzyne state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 126.470 C1 C3 C5 111.342
C1 C3 H7 126.174 C2 C1 C3 126.470
C2 C4 C6 111.342 C2 C4 H8 126.174
C3 C5 C6 122.188 C3 C5 H9 118.993
C4 C6 C5 122.188 C4 C6 H10 118.993
C5 C3 H7 122.484 C5 C6 H10 118.819
C6 C4 H8 122.484 C6 C5 H9 118.819
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability