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

using model chemistry: MP2/Def2TZVPP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/Def2TZVPP
 hartrees
Energy at 0K-263.799278
Energy at 298.15K-263.805170
HF Energy-262.788052
Nuclear repulsion energy209.052731
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 MP2/Def2TZVPP
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 3251 3094 4.78      
2 A1 3223 3067 11.37      
3 A1 3207 3052 9.23      
4 A1 1610 1532 20.10      
5 A1 1439 1369 46.06      
6 A1 1161 1104 2.37      
7 A1 1081 1029 0.97      
8 A1 1011 962 3.52      
9 A1 686 653 3.80      
10 A2 989 941 0.00      
11 A2 408 388 0.00      
12 B1 1013 964 0.04      
13 B1 980 933 0.04      
14 B1 824 784 9.22      
15 B1 750 714 35.84      
16 B1 353 336 3.54      
17 B2 3211 3055 12.69      
18 B2 1618 1540 51.44      
19 B2 1495 1422 4.37      
20 B2 1399 1331 0.11      
21 B2 1332 1267 0.80      
22 B2 1242 1182 6.90      
23 B2 1094 1041 4.40      
24 B2 623 593 12.20      

Unscaled Zero Point Vibrational Energy (zpe) 16998.8 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 16174.3 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 MP2/Def2TZVPP
ABC
0.21024 0.20294 0.10326

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/Def2TZVPP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.349
C2 0.000 0.000 -1.306
C3 0.000 1.183 0.623
C4 0.000 -1.183 0.623
N5 0.000 1.199 -0.715
N6 0.000 -1.199 -0.715
H7 0.000 0.000 2.429
H8 0.000 0.000 -2.388
H9 0.000 2.147 1.116
H10 0.000 -2.147 1.116

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.65531.38811.38812.38642.38641.07963.73682.15952.1595
C22.65532.26342.26341.33671.33673.73491.08163.23693.2369
C31.38812.26342.36651.33782.73182.15863.23521.08243.3665
C41.38812.26342.36652.73181.33782.15863.23523.36651.0824
N52.38641.33671.33782.73182.39733.36392.05832.06173.8137
N62.38641.33672.73181.33782.39733.36392.05833.81372.0617
H71.07963.73492.15862.15863.36393.36394.81642.51632.5163
H83.73681.08163.23523.23522.05832.05834.81644.10944.1094
H92.15953.23691.08243.36652.06173.81372.51634.10944.2938
H102.15953.23693.36651.08243.81372.06172.51634.10944.2938

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 122.185 C1 C3 H9 121.380
C1 C4 N6 122.185 C1 C4 H10 121.380
C2 N5 C3 115.615 C2 N6 C4 115.615
C3 C1 C4 116.947 C3 C1 H7 121.526
C4 C1 H7 121.526 N5 C2 N6 127.453
N5 C2 H8 116.274 N5 C3 H9 116.435
N6 C2 H8 116.274 N6 C4 H10 116.435
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability