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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-264.220387
Energy at 298.15K-264.226251
Nuclear repulsion energy208.981789
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
(Å4/u)
Dep P Dep U
1 A1 3234 3094 9.15      
2 A1 3200 3061 23.04      
3 A1 3184 3046 13.38      
4 A1 1643 1572 43.78      
5 A1 1455 1392 56.74      
6 A1 1174 1123 1.88      
7 A1 1088 1041 0.95      
8 A1 1016 972 5.31      
9 A1 695 665 4.14      
10 A2 1002 959 0.00      
11 A2 405 388 0.00      
12 B1 1022 978 0.00      
13 B1 979 937 0.08      
14 B1 825 789 3.18      
15 B1 738 706 38.36      
16 B1 348 333 3.11      
17 B2 3187 3049 30.20      
18 B2 1640 1569 79.45      
19 B2 1512 1447 9.48      
20 B2 1405 1345 0.21      
21 B2 1291 1235 1.87      
22 B2 1248 1194 8.13      
23 B2 1105 1057 3.21      
24 B2 629 602 11.10      

Unscaled Zero Point Vibrational Energy (zpe) 17012.7 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 16276.1 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 B3PW91/6-31G*
ABC
0.20998 0.20304 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 1.355
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 2.440
H8 0.000 0.000 -2.395
H9 0.000 2.153 1.115
H10 0.000 -2.153 1.115

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.66051.39161.39162.39132.39131.08553.74952.16612.1661
C22.66052.26022.26021.33491.33493.74601.08903.24003.2400
C31.39162.26022.36451.33602.72882.16993.23881.08953.3716
C41.39162.26022.36452.72881.33602.16993.23883.37161.0895
N52.39131.33491.33602.72882.39433.37502.06242.06533.8176
N62.39131.33492.72881.33602.39433.37502.06243.81762.0653
H71.08553.74602.16992.16993.37503.37504.83492.52772.5277
H83.74951.08903.23883.23882.06242.06244.83494.11784.1178
H92.16613.24001.08953.37162.06533.81762.52774.11784.3056
H102.16613.24003.37161.08953.81762.06532.52774.11784.3056

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 122.479 C1 C3 H9 121.143
C1 C4 N6 122.479 C1 C4 H10 121.143
C2 N5 C3 115.613 C2 N6 C4 115.613
C3 C1 C4 116.323 C3 C1 H7 121.839
C4 C1 H7 121.839 N5 C2 N6 127.493
N5 C2 H8 116.253 N5 C3 H9 116.378
N6 C2 H8 116.253 N6 C4 H10 116.378
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 -0.186     -0.675
2 C 0.156     0.741
3 C 0.037     0.574
4 C 0.037     0.574
5 N -0.393     -0.733
6 N -0.393     -0.733
7 H 0.184     0.217
8 H 0.187     -0.010
9 H 0.186     0.022
10 H 0.186     0.022


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 2.321 2.321
CHELPG        
AIM        
ESP 0.000 0.000 2.325 2.325


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> 114.431
(<r2>)1/2 10.697