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

using model chemistry: B3LYP/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 B3LYP/CEP-121G
 hartrees
Energy at 0K-44.715587
Energy at 298.15K-44.721471
Nuclear repulsion energy104.093941
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 B3LYP/CEP-121G
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 3199 3117 0.47      
2 A1 3193 3111 44.07      
3 A1 3159 3078 5.48      
4 A1 1559 1519 21.62      
5 A1 1409 1373 64.59      
6 A1 1135 1106 2.77      
7 A1 1055 1028 0.57      
8 A1 958 934 1.81      
9 A1 677 659 4.72      
10 A2 993 967 0.00      
11 A2 415 405 0.00      
12 B1 1011 986 0.00      
13 B1 983 958 0.13      
14 B1 825 804 20.12      
15 B1 749 730 37.24      
16 B1 355 346 4.40      
17 B2 3166 3085 28.80      
18 B2 1560 1521 61.94      
19 B2 1468 1430 12.38      
20 B2 1393 1357 0.16      
21 B2 1224 1193 9.02      
22 B2 1194 1163 0.11      
23 B2 1067 1040 5.14      
24 B2 623 608 9.66      

Unscaled Zero Point Vibrational Energy (zpe) 16684.6 cm-1
Scaled (by 0.9745) Zero Point Vibrational Energy (zpe) 16259.1 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 B3LYP/CEP-121G
ABC
0.20157 0.19610 0.09940

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/CEP-121G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.369
C2 0.000 0.000 -1.353
C3 0.000 1.206 0.630
C4 0.000 -1.206 0.630
N5 0.000 1.218 -0.736
N6 0.000 -1.218 -0.736
H7 0.000 0.000 2.454
H8 0.000 0.000 -2.438
H9 0.000 2.177 1.120
H10 0.000 -2.177 1.120

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.72121.41371.41372.43182.43181.08593.80692.19122.1912
C22.72122.32072.32071.36471.36473.80701.08573.29433.2943
C31.41372.32072.41121.36682.78222.18653.29701.08783.4179
C41.41372.32072.41122.78221.36682.18653.29703.41791.0878
N52.43181.36471.36682.78222.43543.41532.09272.08953.8691
N62.43181.36472.78221.36682.43543.41532.09273.86912.0895
H71.08593.80702.18652.18653.41533.41534.89272.55352.5535
H83.80691.08573.29703.29702.09272.09274.89274.17134.1713
H92.19123.29431.08783.41792.08953.86912.55354.17134.3540
H102.19123.29433.41791.08783.86912.08952.55354.17134.3540

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 121.985 C1 C3 H9 121.777
C1 C4 N6 121.985 C1 C4 H10 121.777
C2 N5 C3 116.335 C2 N6 C4 116.335
C3 C1 C4 117.044 C3 C1 H7 121.478
C4 C1 H7 121.478 N5 C2 N6 126.318
N5 C2 H8 116.841 N5 C3 H9 116.238
N6 C2 H8 116.841 N6 C4 H10 116.238
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.019      
2 C -0.337      
3 C -0.321      
4 C -0.321      
5 N 0.136      
6 N 0.136      
7 H 0.181      
8 H 0.176      
9 H 0.165      
10 H 0.165      


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 2.739 2.739
CHELPG        
AIM        
ESP        


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 3.991 0.000 0.000
y 0.000 9.035 0.000
z 0.000 0.000 9.827


<r2> (average value of r2) Å2
<r2> 95.897
(<r2>)1/2 9.793