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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-262.857049
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
(Å4/u)
Dep P Dep U
1 A1 3232 3119 5.07      
2 A1 3212 3100 20.99      
3 A1 3187 3075 6.62      
4 A1 1561 1506 10.93      
5 A1 1419 1369 70.40      
6 A1 1169 1128 8.61      
7 A1 1092 1054 0.03      
8 A1 980 946 1.56      
9 A1 709 684 4.88      
10 A2 1023 987 0.00      
11 A2 426 411 0.00      
12 B1 1068 1031 0.05      
13 B1 1015 979 0.10      
14 B1 849 819 6.83      
15 B1 768 741 47.58      
16 B1 368 355 3.81      
17 B2 3190 3078 24.88      
18 B2 1563 1508 59.15      
19 B2 1491 1438 6.36      
20 B2 1420 1370 0.68      
21 B2 1251 1207 6.89      
22 B2 1147 1106 0.65      
23 B2 1082 1044 2.43      
24 B2 651 628 11.89      

Unscaled Zero Point Vibrational Energy (zpe) 16935.5 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 16341.0 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     -0.712
2 C 0.214     0.787
3 C 0.072     0.592
4 C 0.072     0.592
5 N -0.494     -0.753
6 N -0.494     -0.753
7 H 0.203     0.231
8 H 0.233     -0.026
9 H 0.224     0.021
10 H 0.224     0.021


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 0.000 0.000 2.352 2.352


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