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

using model chemistry: B3PW91/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3PW91/6-31G
 hartrees
Energy at 0K-264.130304
Energy at 298.15K-264.136229
Nuclear repulsion energy207.469606
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 B3PW91/6-31G
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 3258 3121 3.45      
2 A1 3252 3114 26.17      
3 A1 3220 3084 4.03      
4 A1 1606 1538 21.80      
5 A1 1443 1382 66.24      
6 A1 1172 1122 3.97      
7 A1 1094 1048 0.36      
8 A1 999 957 2.11      
9 A1 700 670 4.83      
10 A2 1014 971 0.00      
11 A2 418 400 0.00      
12 B1 1044 1000 0.00      
13 B1 999 956 0.05      
14 B1 836 801 8.42      
15 B1 757 725 46.43      
16 B1 358 343 4.70      
17 B2 3225 3089 23.21      
18 B2 1608 1540 58.19      
19 B2 1500 1437 12.18      
20 B2 1413 1354 0.49      
21 B2 1262 1209 7.17      
22 B2 1242 1190 0.98      
23 B2 1101 1054 4.15      
24 B2 639 612 10.68      

Unscaled Zero Point Vibrational Energy (zpe) 17080.2 cm-1
Scaled (by 0.9577) Zero Point Vibrational Energy (zpe) 16357.7 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 B3PW91/6-31G
ABC
0.20587 0.20093 0.10169

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.362
C2 0.000 0.000 -1.330
C3 0.000 1.191 0.633
C4 0.000 -1.191 0.633
N5 0.000 1.202 -0.719
N6 0.000 -1.202 -0.719
H7 0.000 0.000 2.445
H8 0.000 0.000 -2.412
H9 0.000 2.159 1.122
H10 0.000 -2.159 1.122

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.69121.39631.39632.40252.40251.08373.77382.17272.1727
C22.69122.29522.29521.34841.34843.77491.08263.26673.2667
C31.39632.29522.38171.35112.74792.16903.26931.08503.3857
C41.39632.29522.38172.74791.35112.16903.26933.38571.0850
N52.40251.34841.35112.74792.40403.38462.07682.07433.8321
N62.40251.34842.74791.35112.40403.38462.07683.83212.0743
H71.08373.77492.16902.16903.38463.38464.85762.53282.5328
H83.77381.08263.26933.26932.07682.07684.85764.14134.1413
H92.17273.26671.08503.38572.07433.83212.53284.14134.3188
H102.17273.26673.38571.08503.83212.07432.53284.14134.3188

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 121.954 C1 C3 H9 121.725
C1 C4 N6 121.954 C1 C4 H10 121.725
C2 N5 C3 116.472 C2 N6 C4 116.472
C3 C1 C4 117.040 C3 C1 H7 121.480
C4 C1 H7 121.480 N5 C2 N6 126.109
N5 C2 H8 116.945 N5 C3 H9 116.322
N6 C2 H8 116.945 N6 C4 H10 116.322
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.143      
2 C 0.086      
3 C -0.009      
4 C -0.009      
5 N -0.353      
6 N -0.353      
7 H 0.188      
8 H 0.202      
9 H 0.196      
10 H 0.196      


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 2.648 2.648
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 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 116.207
(<r2>)1/2 10.780