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All results from a given calculation for C4H4N2 (1,3-Diazine)

using model chemistry: B3PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/6-31G**
 hartrees
Energy at 0K-264.225798
Energy at 298.15K-264.231674
Nuclear repulsion energy208.989594
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 B3PW91/6-31G**
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 3229 3095 7.71      
2 A1 3189 3057 19.73      
3 A1 3176 3044 14.20      
4 A1 1640 1572 44.61      
5 A1 1450 1389 55.43      
6 A1 1172 1123 1.79      
7 A1 1086 1041 1.00      
8 A1 1015 973 5.32      
9 A1 694 665 4.18      
10 A2 1003 961 0.00      
11 A2 404 387 0.00      
12 B1 1024 981 0.00      
13 B1 981 940 0.06      
14 B1 826 791 3.05      
15 B1 738 707 37.50      
16 B1 347 332 3.19      
17 B2 3179 3046 27.50      
18 B2 1637 1569 79.36      
19 B2 1506 1443 9.12      
20 B2 1397 1339 0.17      
21 B2 1290 1236 1.64      
22 B2 1244 1192 8.51      
23 B2 1102 1056 3.16      
24 B2 629 603 11.26      

Unscaled Zero Point Vibrational Energy (zpe) 16977.2 cm-1
Scaled (by 0.9584) Zero Point Vibrational Energy (zpe) 16271.0 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 B3PW91/6-31G**
ABC
0.20999 0.20305 0.10323

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.354
C2 0.000 0.000 -1.306
C3 0.000 1.182 0.621
C4 0.000 -1.182 0.621
N5 0.000 1.197 -0.715
N6 0.000 -1.197 -0.715
H7 0.000 0.000 2.439
H8 0.000 0.000 -2.395
H9 0.000 2.152 1.117
H10 0.000 -2.152 1.117

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.66041.39151.39152.39092.39091.08493.74912.16512.1651
C22.66042.26052.26051.33491.33493.74531.08883.24043.2404
C31.39152.26052.36471.33592.72882.16933.23891.08923.3711
C41.39152.26052.36472.72881.33592.16933.23893.37111.0892
N52.39091.33491.33592.72882.39423.37412.06252.06583.8174
N62.39091.33492.72881.33592.39423.37412.06253.81742.0658
H71.08493.74532.16932.16933.37413.37414.83412.52602.5260
H83.74911.08883.23893.23892.06252.06254.83414.11834.1183
H92.16513.24041.08923.37112.06583.81742.52604.11834.3040
H102.16513.24043.37111.08923.81742.06582.52604.11834.3040

picture of 1,3-Diazine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 N5 122.458 C1 C3 H9 121.086
C1 C4 N6 122.458 C1 C4 H10 121.086
C2 N5 C3 115.631 C2 N6 C4 115.631
C3 C1 C4 116.352 C3 C1 H7 121.824
C4 C1 H7 121.824 N5 C2 N6 127.470
N5 C2 H8 116.265 N5 C3 H9 116.456
N6 C2 H8 116.265 N6 C4 H10 116.456
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.145      
2 C 0.216      
3 C 0.090      
4 C 0.090      
5 N -0.414      
6 N -0.414      
7 H 0.140      
8 H 0.146      
9 H 0.145      
10 H 0.145      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 2.312 2.312
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


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


<r2> (average value of r2) Å2
<r2> 114.426
(<r2>)1/2 10.697