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

using model chemistry: MP2/LANL2DZ

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/LANL2DZ
 hartrees
Energy at 0K-263.133735
Energy at 298.15K-263.139455
HF Energy-262.582375
Nuclear repulsion energy203.323306
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/LANL2DZ
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 3240 3120 4.74      
2 A1 3232 3112 31.47      
3 A1 3198 3080 0.66      
4 A1 1527 1471 3.48      
5 A1 1386 1335 48.38      
6 A1 1123 1082 3.96      
7 A1 1055 1016 0.23      
8 A1 936 902 0.31      
9 A1 672 647 5.17      
10 A2 892 859 0.00      
11 A2 407 392 0.00      
12 B1 927 893 0.01      
13 B1 897 864 0.79      
14 B1 788 759 10.96      
15 B1 736 709 57.33      
16 B1 348 335 4.01      
17 B2 3211 3093 19.54      
18 B2 1538 1482 36.93      
19 B2 1455 1401 7.01      
20 B2 1382 1331 0.67      
21 B2 1213 1168 3.93      
22 B2 1170 1126 0.00      
23 B2 1038 1000 6.32      
24 B2 621 598 9.73      

Unscaled Zero Point Vibrational Energy (zpe) 16495.4 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 15886.8 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/LANL2DZ
ABC
0.19789 0.19243 0.09756

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/LANL2DZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.388
C2 0.000 0.000 -1.358
C3 0.000 1.217 0.649
C4 0.000 -1.217 0.649
N5 0.000 1.230 -0.734
N6 0.000 -1.230 -0.734
H7 0.000 0.000 2.480
H8 0.000 0.000 -2.447
H9 0.000 2.193 1.137
H10 0.000 -2.193 1.137

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.74521.42331.42332.45242.45241.09213.83502.20742.2074
C22.74522.34652.34651.37931.37933.83731.08983.32183.3218
C31.42332.34652.43321.38292.81062.19813.32681.09193.4446
C41.42332.34652.43322.81061.38292.19813.32683.44461.0919
N52.45241.37931.38292.81062.46053.44102.10942.10453.9015
N62.45241.37932.81061.38292.46053.44102.10943.90152.1045
H71.09213.83732.19812.19813.44103.44104.92712.57142.5714
H83.83501.08983.32683.32682.10942.10944.92714.20244.2024
H92.20743.32181.09193.44462.10453.90152.57144.20244.3864
H102.20743.32183.44461.09193.90152.10452.57144.20244.3864

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 121.827 C1 C3 H9 122.167
C1 C4 N6 121.827 C1 C4 H10 122.167
C2 N5 C3 116.320 C2 N6 C4 116.320
C3 C1 C4 117.473 C3 C1 H7 121.263
C4 C1 H7 121.263 N5 C2 N6 126.233
N5 C2 H8 116.883 N5 C3 H9 116.006
N6 C2 H8 116.883 N6 C4 H10 116.006
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability