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

using model chemistry: MP2/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/6-31G*
 hartrees
Energy at 0K-263.509482
Energy at 298.15K-263.515329
HF Energy-262.690180
Nuclear repulsion energy208.201168
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 MP2/6-31G*
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 3265 3079 5.23      
2 A1 3243 3058 18.01      
3 A1 3225 3041 8.20      
4 A1 1635 1542 16.63      
5 A1 1458 1375 48.66      
6 A1 1175 1108 3.73      
7 A1 1090 1028 1.08      
8 A1 1015 957 4.06      
9 A1 693 654 4.71      
10 A2 976 921 0.00      
11 A2 406 383 0.00      
12 B1 989 932 0.07      
13 B1 941 887 0.37      
14 B1 811 764 10.36      
15 B1 734 692 33.47      
16 B1 350 330 3.38      
17 B2 3228 3044 20.28      
18 B2 1642 1549 48.24      
19 B2 1518 1432 8.19      
20 B2 1421 1340 0.06      
21 B2 1342 1266 0.61      
22 B2 1264 1192 5.13      
23 B2 1113 1050 4.64      
24 B2 629 593 11.93      

Unscaled Zero Point Vibrational Energy (zpe) 17081.0 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 16107.4 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 MP2/6-31G*
ABC
0.20863 0.20126 0.10244

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.356
C2 0.000 0.000 -1.314
C3 0.000 1.187 0.626
C4 0.000 -1.187 0.626
N5 0.000 1.203 -0.717
N6 0.000 -1.203 -0.717
H7 0.000 0.000 2.441
H8 0.000 0.000 -2.402
H9 0.000 2.156 1.121
H10 0.000 -2.156 1.121

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.66961.39331.39332.39672.39671.08523.75762.16912.1691
C22.66962.27402.27401.34231.34233.75481.08803.25273.2527
C31.39332.27402.37371.34342.74112.16873.25211.08883.3797
C41.39332.27402.37372.74111.34342.16873.25213.37971.0888
N52.39671.34231.34342.74112.40503.37962.06962.07143.8292
N62.39671.34232.74111.34342.40503.37962.06963.82922.0714
H71.08523.75482.16872.16873.37963.37964.84282.52812.5281
H83.75761.08803.25213.25212.06962.06964.84284.13074.1307
H92.16913.25271.08883.37972.07143.82922.52814.13074.3128
H102.16913.25273.37971.08883.82922.07142.52814.13074.3128

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 122.259 C1 C3 H9 121.343
C1 C4 N6 122.259 C1 C4 H10 121.343
C2 N5 C3 115.712 C2 N6 C4 115.712
C3 C1 C4 116.818 C3 C1 H7 121.591
C4 C1 H7 121.591 N5 C2 N6 127.239
N5 C2 H8 116.380 N5 C3 H9 116.398
N6 C2 H8 116.380 N6 C4 H10 116.398
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability