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

using model chemistry: B3LYP/3-21G*

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/3-21G*
 hartrees
Energy at 0K-262.851090
Energy at 298.15K-262.857038
Nuclear repulsion energy207.428621
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/3-21G*
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 3232 3110 5.07      
2 A1 3212 3090 20.99      
3 A1 3187 3066 6.62      
4 A1 1561 1501 10.93      
5 A1 1419 1365 70.40      
6 A1 1169 1125 8.61      
7 A1 1092 1050 0.03      
8 A1 980 943 1.56      
9 A1 709 682 4.88      
10 A2 1023 984 0.00      
11 A2 426 410 0.00      
12 B1 1068 1028 0.05      
13 B1 1015 976 0.10      
14 B1 849 817 6.83      
15 B1 768 739 47.58      
16 B1 368 354 3.81      
17 B2 3190 3069 24.88      
18 B2 1563 1503 59.15      
19 B2 1491 1434 6.36      
20 B2 1420 1366 0.68      
21 B2 1251 1203 6.89      
22 B2 1147 1103 0.65      
23 B2 1082 1041 2.43      
24 B2 651 626 11.89      

Unscaled Zero Point Vibrational Energy (zpe) 16935.5 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 16291.9 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/3-21G*
ABC
0.20557 0.20107 0.10165

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.361
C2 0.000 0.000 -1.331
C3 0.000 1.190 0.633
C4 0.000 -1.190 0.633
N5 0.000 1.203 -0.719
N6 0.000 -1.203 -0.719
H7 0.000 0.000 2.443
H8 0.000 0.000 -2.414
H9 0.000 2.153 1.132
H10 0.000 -2.153 1.132

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.69241.39491.39492.40332.40331.08203.77502.16482.1648
C22.69242.29622.29621.34981.34983.77441.08263.27123.2712
C31.39492.29622.37921.35222.74832.16623.27071.08463.3793
C41.39492.29622.37922.74831.35222.16623.27073.37931.0846
N52.40331.34981.35222.74832.40613.38362.07822.08053.8324
N62.40331.34982.74831.35222.40613.38362.07823.83242.0805
H71.08203.77442.16622.16623.38363.38364.85702.52062.5206
H83.77501.08263.27073.27072.07822.07824.85704.14804.1480
H92.16483.27121.08463.37932.08053.83242.52064.14804.3052
H102.16483.27123.37931.08463.83242.08052.52064.14804.3052

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 122.048 C1 C3 H9 121.127
C1 C4 N6 122.048 C1 C4 H10 121.127
C2 N5 C3 116.391 C2 N6 C4 116.391
C3 C1 C4 117.044 C3 C1 H7 121.478
C4 C1 H7 121.478 N5 C2 N6 126.077
N5 C2 H8 116.962 N5 C3 H9 116.825
N6 C2 H8 116.962 N6 C4 H10 116.825
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.255      
2 C 0.214      
3 C 0.072      
4 C 0.072      
5 N -0.494      
6 N -0.494      
7 H 0.203      
8 H 0.233      
9 H 0.224      
10 H 0.224      


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 2.346 2.346
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 2.333 0.000 0.000
y 0.000 7.725 0.000
z 0.000 0.000 8.605


<r2> (average value of r2) Å2
<r2> 116.181
(<r2>)1/2 10.779