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

using model chemistry: B2PLYP/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 B2PLYP/6-31G*
 hartrees
Energy at 0K-264.047181
Energy at 298.15K-264.053053
HF Energy-263.773519
Nuclear repulsion energy208.540867
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 B2PLYP/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3251 3086 8.56      
2 A1 3227 3063 22.61      
3 A1 3208 3045 10.17      
4 A1 1633 1550 33.25      
5 A1 1454 1380 58.54      
6 A1 1173 1113 3.23      
7 A1 1090 1035 1.12      
8 A1 1012 961 4.35      
9 A1 696 661 4.13      
10 A2 1000 949 0.00      
11 A2 409 388 0.00      
12 B1 1015 964 0.03      
13 B1 971 922 0.02      
14 B1 824 783 3.83      
15 B1 737 700 36.02      
16 B1 353 335 3.16      
17 B2 3212 3048 27.46      
18 B2 1633 1550 72.28      
19 B2 1518 1441 9.38      
20 B2 1419 1347 0.24      
21 B2 1285 1220 3.08      
22 B2 1249 1185 6.32      
23 B2 1108 1052 3.14      
24 B2 633 601 11.59      

Unscaled Zero Point Vibrational Energy (zpe) 17054.3 cm-1
Scaled (by 0.9492) Zero Point Vibrational Energy (zpe) 16188.0 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 B2PLYP/6-31G*
ABC
0.20913 0.20205 0.10277

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.348
C2 0.000 0.000 -1.307
C3 0.000 1.191 0.621
C4 0.000 -1.191 0.621
N5 0.000 1.200 -0.713
N6 0.000 -1.200 -0.713
H7 0.000 0.000 2.427
H8 0.000 0.000 -2.384
H9 0.000 2.149 1.119
H10 0.000 -2.149 1.119

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.65461.39511.39512.38462.38461.07943.73202.16072.1607
C22.65462.26622.26621.33891.33893.73411.07743.24053.2405
C31.39512.26622.38191.33412.73792.16333.23281.07923.3764
C41.39512.26622.38192.73791.33412.16333.23283.37641.0792
N52.38461.33891.33412.73792.39993.36162.05752.06293.8168
N62.38461.33892.73791.33412.39993.36162.05753.81682.0629
H71.07943.73412.16332.16333.36163.36164.81142.51552.5155
H83.73201.07743.23283.23282.05752.05754.81144.10964.1096
H92.16073.24051.07923.37642.06293.81682.51554.10964.2970
H102.16073.24053.37641.07923.81682.06292.51554.10964.2970

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 121.772 C1 C3 H9 121.146
C1 C4 N6 121.772 C1 C4 H10 121.146
C2 N5 C3 115.949 C2 N6 C4 115.949
C3 C1 C4 117.228 C3 C1 H7 121.386
C4 C1 H7 121.386 N5 C2 N6 127.330
N5 C2 H8 116.335 N5 C3 H9 117.083
N6 C2 H8 116.335 N6 C4 H10 117.083
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B2PLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.202      
2 C 0.206      
3 C 0.068      
4 C 0.068      
5 N -0.437      
6 N -0.437      
7 H 0.182      
8 H 0.184      
9 H 0.184      
10 H 0.184      


Electric dipole moments


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 2.999 0.000 0.000
y 0.000 8.356 0.000
z 0.000 0.000 9.009


<r2> (average value of r2) Å2
<r2> 115.035
(<r2>)1/2 10.725