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

using model chemistry: HF/CEP-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/CEP-31G*
 hartrees
Energy at 0K-43.629128
Energy at 298.15K-43.635285
Nuclear repulsion energy106.032461
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/CEP-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 3423 3074 7.77      
2 A1 3413 3065 44.40      
3 A1 3382 3037 22.39      
4 A1 1784 1602 109.47      
5 A1 1549 1391 82.62      
6 A1 1245 1118 0.38      
7 A1 1151 1033 1.56      
8 A1 1090 979 5.07      
9 A1 734 659 4.33      
10 A2 1129 1014 0.00      
11 A2 454 407 0.00      
12 B1 1158 1040 0.06      
13 B1 1106 993 1.48      
14 B1 912 819 12.93      
15 B1 783 703 55.58      
16 B1 409 368 3.16      
17 B2 3387 3041 47.69      
18 B2 1794 1611 155.37      
19 B2 1618 1453 17.02      
20 B2 1496 1343 1.25      
21 B2 1343 1206 11.08      
22 B2 1214 1090 15.26      
23 B2 1165 1046 0.23      
24 B2 674 606 11.94      

Unscaled Zero Point Vibrational Energy (zpe) 18206.1 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 16349.0 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/CEP-31G*
ABC
0.21009 0.20307 0.10326

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-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 -1.313
C3 0.000 1.187 0.606
C4 0.000 -1.187 0.606
N5 0.000 1.193 -0.725
N6 0.000 -1.193 -0.725
H7 0.000 0.000 2.432
H8 0.000 0.000 -2.393
H9 0.000 2.153 1.095
H10 0.000 -2.153 1.095

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.66661.40271.40272.39662.39661.07763.74742.16822.1682
C22.66662.25652.25651.33011.33013.74421.08093.22943.2294
C31.40272.25652.37391.33102.72692.17713.22621.08213.3751
C41.40272.25652.37392.72691.33102.17713.22623.37511.0821
N52.39661.33011.33102.72692.38613.37412.05152.05683.8083
N62.39661.33012.72691.33102.38613.37412.05153.80832.0568
H71.07763.74422.17712.17713.37413.37414.82502.53402.5340
H83.74741.08093.22623.22622.05152.05154.82504.09894.0989
H92.16823.22941.08213.37512.05683.80832.53404.09894.3052
H102.16823.22943.37511.08213.80832.05682.53404.09894.3052

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 122.464 C1 C3 H9 120.979
C1 C4 N6 122.464 C1 C4 H10 120.979
C2 N5 C3 115.977 C2 N6 C4 115.977
C3 C1 C4 115.598 C3 C1 H7 122.201
C4 C1 H7 122.201 N5 C2 N6 127.521
N5 C2 H8 116.240 N5 C3 H9 116.558
N6 C2 H8 116.240 N6 C4 H10 116.558
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.058      
2 C -0.396      
3 C -0.491      
4 C -0.491      
5 N 0.161      
6 N 0.161      
7 H 0.308      
8 H 0.223      
9 H 0.233      
10 H 0.233      


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 2.549 2.549
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 3.811 0.000 0.000
y 0.000 8.305 0.000
z 0.000 0.000 8.603


<r2> (average value of r2) Å2
<r2> 92.897
(<r2>)1/2 9.638