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

using model chemistry: MP2/CEP-121G*

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/CEP-121G*
 hartrees
Energy at 0K-44.466791
Energy at 298.15K-44.472560
HF Energy-43.638971
Nuclear repulsion energy104.906582
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/CEP-121G*
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 3239 3086 9.59      
2 A1 3224 3072 18.10      
3 A1 3201 3050 9.21      
4 A1 1600 1524 17.45      
5 A1 1430 1362 46.72      
6 A1 1149 1095 2.07      
7 A1 1067 1016 1.11      
8 A1 994 947 2.92      
9 A1 679 647 4.37      
10 A2 935 891 0.00      
11 A2 401 382 0.00      
12 B1 953 908 0.01      
13 B1 889 847 0.09      
14 B1 799 761 27.55      
15 B1 732 697 31.04      
16 B1 328 312 3.29      
17 B2 3205 3054 20.11      
18 B2 1606 1530 49.69      
19 B2 1489 1419 6.93      
20 B2 1395 1330 0.07      
21 B2 1310 1248 0.53      
22 B2 1235 1176 6.80      
23 B2 1087 1035 5.65      
24 B2 618 589 9.96      

Unscaled Zero Point Vibrational Energy (zpe) 16780.4 cm-1
Scaled (by 0.9528) Zero Point Vibrational Energy (zpe) 15988.3 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/CEP-121G*
ABC
0.20629 0.19823 0.10109

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.354
C2 0.000 0.000 -1.329
C3 0.000 1.197 0.621
C4 0.000 -1.197 0.621
N5 0.000 1.213 -0.732
N6 0.000 -1.213 -0.732
H7 0.000 0.000 2.441
H8 0.000 0.000 -2.417
H9 0.000 2.168 1.114
H10 0.000 -2.168 1.114

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.68291.40351.40352.41292.41291.08683.77142.18162.1816
C22.68292.28752.28751.35181.35183.76971.08853.26613.2661
C31.40352.28752.39341.35262.76322.17833.26521.08953.4009
C41.40352.28752.39342.76321.35262.17833.26523.40091.0895
N52.41291.35181.35262.76322.42573.39662.07652.07823.8520
N62.41291.35182.76321.35262.42573.39662.07653.85202.0782
H71.08683.76972.17832.17833.39663.39664.85822.54222.5422
H83.77141.08853.26523.26522.07652.07654.85824.14364.1436
H92.18163.26611.08953.40092.07823.85202.54224.14364.3366
H102.18163.26613.40091.08953.85202.07822.54224.14364.3366

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 122.184 C1 C3 H9 121.597
C1 C4 N6 122.184 C1 C4 H10 121.597
C2 N5 C3 115.524 C2 N6 C4 115.524
C3 C1 C4 116.999 C3 C1 H7 121.500
C4 C1 H7 121.500 N5 C2 N6 127.584
N5 C2 H8 116.208 N5 C3 H9 116.219
N6 C2 H8 116.208 N6 C4 H10 116.219
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability