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

using model chemistry: HF/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 HF/6-31G**
 hartrees
Energy at 0K-262.700342
Energy at 298.15K-262.706544
Nuclear repulsion energy211.146512
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/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 3393 3062 7.51      
2 A1 3370 3041 28.65      
3 A1 3348 3022 11.68      
4 A1 1798 1623 91.84      
5 A1 1569 1416 85.71      
6 A1 1258 1136 1.55      
7 A1 1162 1049 1.89      
8 A1 1103 995 6.31      
9 A1 752 678 4.52      
10 A2 1130 1020 0.00      
11 A2 461 416 0.00      
12 B1 1156 1043 0.05      
13 B1 1096 989 1.92      
14 B1 911 822 3.79      
15 B1 788 711 54.40      
16 B1 415 375 3.34      
17 B2 3352 3026 35.59      
18 B2 1799 1623 132.15      
19 B2 1637 1477 23.08      
20 B2 1512 1365 1.11      
21 B2 1355 1223 10.97      
22 B2 1212 1094 9.74      
23 B2 1161 1048 2.64      
24 B2 683 617 14.36      

Unscaled Zero Point Vibrational Energy (zpe) 18209.6 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 16436.0 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 HF/6-31G**
ABC
0.21360 0.20788 0.10535

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.346
C2 0.000 0.000 -1.297
C3 0.000 1.172 0.614
C4 0.000 -1.172 0.614
N5 0.000 1.179 -0.707
N6 0.000 -1.179 -0.707
H7 0.000 0.000 2.419
H8 0.000 0.000 -2.373
H9 0.000 2.132 1.101
H10 0.000 -2.132 1.101

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.64301.38201.38202.36752.36751.07333.71842.14622.1462
C22.64302.24182.24181.31871.31873.71631.07553.20913.2091
C31.38202.24182.34441.32092.69712.15253.20821.07673.3402
C41.38202.24182.34442.69711.32092.15253.20823.34021.0767
N52.36751.31871.32092.69712.35863.34122.04082.04403.7731
N62.36751.31872.69711.32092.35863.34122.04083.77312.0440
H71.07333.71632.15252.15253.34123.34124.79172.50662.5066
H83.71841.07553.20823.20822.04082.04084.79174.07604.0760
H92.14623.20911.07673.34022.04403.77312.50664.07604.2644
H102.14623.20913.34021.07673.77312.04402.50664.07604.2644

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 122.291 C1 C3 H9 121.097
C1 C4 N6 122.291 C1 C4 H10 121.097
C2 N5 C3 116.276 C2 N6 C4 116.276
C3 C1 C4 116.032 C3 C1 H7 121.984
C4 C1 H7 121.984 N5 C2 N6 126.833
N5 C2 H8 116.583 N5 C3 H9 116.612
N6 C2 H8 116.583 N6 C4 H10 116.612
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.246 -0.710    
2 C 0.327 0.882    
3 C 0.159 0.675    
4 C 0.159 0.675    
5 N -0.531 -0.849    
6 N -0.531 -0.849    
7 H 0.169 0.200    
8 H 0.163 -0.033    
9 H 0.166 0.005    
10 H 0.166 0.005    


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 2.419 2.419
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 3.008 0.000 0.000
y 0.000 8.042 0.000
z 0.000 0.000 8.540


<r2> (average value of r2) Å2
<r2> 112.923
(<r2>)1/2 10.627