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

using model chemistry: HF/SDD

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/SDD
 hartrees
Energy at 0K-262.593752
Energy at 298.15K-262.599981
Nuclear repulsion energy209.006794
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 HF/SDD
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 3464 3119 9.00      
2 A1 3451 3108 27.18      
3 A1 3421 3080 4.80      
4 A1 1751 1576 56.09      
5 A1 1552 1398 83.30      
6 A1 1244 1120 1.82      
7 A1 1156 1040 2.07      
8 A1 1072 965 3.09      
9 A1 748 673 6.00      
10 A2 1117 1006 0.00      
11 A2 479 431 0.00      
12 B1 1154 1039 0.35      
13 B1 1097 988 0.49      
14 B1 918 827 15.26      
15 B1 819 737 71.06      
16 B1 432 389 4.44      
17 B2 3428 3086 23.08      
18 B2 1748 1574 98.95      
19 B2 1615 1454 19.01      
20 B2 1510 1359 1.23      
21 B2 1345 1211 11.19      
22 B2 1211 1090 9.41      
23 B2 1175 1058 3.01      
24 B2 690 621 13.98      

Unscaled Zero Point Vibrational Energy (zpe) 18297.5 cm-1
Scaled (by 0.9004) Zero Point Vibrational Energy (zpe) 16475.1 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 HF/SDD
ABC
0.20789 0.20465 0.10313

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/SDD

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.358
C2 0.000 0.000 -1.329
C3 0.000 1.187 0.628
C4 0.000 -1.187 0.628
N5 0.000 1.184 -0.711
N6 0.000 -1.184 -0.711
H7 0.000 0.000 2.427
H8 0.000 0.000 -2.396
H9 0.000 2.144 1.107
H10 0.000 -2.144 1.107

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.68731.39391.39392.38462.38461.06903.75472.15892.1589
C22.68732.28862.28861.33571.33573.75621.06743.24483.2448
C31.39392.28862.37421.33902.72342.15593.24871.07013.3655
C41.39392.28862.37422.72341.33902.15593.24873.36551.0701
N52.38461.33571.33902.72342.36883.35472.05962.05563.7926
N62.38461.33572.72341.33902.36883.35472.05963.79262.0556
H71.06903.75622.15592.15593.35473.35474.82372.51832.5183
H83.75471.06743.24873.24872.05962.05964.82374.10704.1070
H92.15893.24481.07013.36552.05563.79262.51834.10704.2883
H102.15893.24483.36551.07013.79262.05562.51834.10704.2883

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 121.494 C1 C3 H9 121.812
C1 C4 N6 121.494 C1 C4 H10 121.812
C2 N5 C3 117.657 C2 N6 C4 117.657
C3 C1 C4 116.778 C3 C1 H7 121.611
C4 C1 H7 121.611 N5 C2 N6 124.921
N5 C2 H8 117.540 N5 C3 H9 116.695
N6 C2 H8 117.540 N6 C4 H10 116.695
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/SDD Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.214      
2 C -0.102      
3 C -0.108      
4 C -0.108      
5 N -0.205      
6 N -0.205      
7 H 0.225      
8 H 0.240      
9 H 0.239      
10 H 0.239      


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 2.881 2.881
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 3.184 0.000 0.000
y 0.000 8.046 0.000
z 0.000 0.000 8.501


<r2> (average value of r2) Å2
<r2> 115.704
(<r2>)1/2 10.757