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

using model chemistry: mPW1PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/6-31G*
 hartrees
Energy at 0K-264.255669
Energy at 298.15K-264.261564
Nuclear repulsion energy209.361139
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 mPW1PW91/6-31G*
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 3256 3087 7.91      
2 A1 3223 3056 22.03      
3 A1 3206 3040 12.79      
4 A1 1660 1574 46.87      
5 A1 1466 1390 57.10      
6 A1 1183 1122 1.66      
7 A1 1095 1039 0.90      
8 A1 1025 972 5.50      
9 A1 699 663 4.21      
10 A2 1012 960 0.00      
11 A2 409 388 0.00      
12 B1 1032 979 0.00      
13 B1 988 937 0.11      
14 B1 832 789 3.29      
15 B1 743 704 39.43      
16 B1 353 335 3.14      
17 B2 3209 3043 28.25      
18 B2 1657 1572 82.17      
19 B2 1524 1445 10.07      
20 B2 1413 1340 0.23      
21 B2 1301 1234 1.55      
22 B2 1256 1191 8.61      
23 B2 1113 1056 3.11      
24 B2 632 600 11.22      

Unscaled Zero Point Vibrational Energy (zpe) 17143.7 cm-1
Scaled (by 0.9483) Zero Point Vibrational Energy (zpe) 16257.4 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 mPW1PW91/6-31G*
ABC
0.21073 0.20379 0.10360

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.353
C2 0.000 0.000 -1.303
C3 0.000 1.180 0.619
C4 0.000 -1.180 0.619
N5 0.000 1.195 -0.714
N6 0.000 -1.195 -0.714
H7 0.000 0.000 2.436
H8 0.000 0.000 -2.391
H9 0.000 2.150 1.113
H10 0.000 -2.150 1.113

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.65601.38961.38962.38702.38701.08383.74322.16292.1629
C22.65602.25612.25611.33211.33213.73981.08723.23413.2341
C31.38962.25612.36071.33332.72362.16683.23301.08773.3663
C41.38962.25612.36072.72361.33332.16683.23303.36631.0877
N52.38701.33211.33332.72362.38933.36932.05872.06153.8107
N62.38701.33212.72361.33332.38933.36932.05873.81072.0615
H71.08383.73982.16682.16683.36933.36934.82702.52432.5243
H83.74321.08723.23303.23302.05872.05874.82704.11044.1104
H92.16293.23411.08773.36632.06153.81072.52434.11044.2992
H102.16293.23413.36631.08773.81072.06152.52434.11044.2992

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 122.466 C1 C3 H9 121.154
C1 C4 N6 122.466 C1 C4 H10 121.154
C2 N5 C3 115.648 C2 N6 C4 115.648
C3 C1 C4 116.295 C3 C1 H7 121.852
C4 C1 H7 121.852 N5 C2 N6 127.476
N5 C2 H8 116.262 N5 C3 H9 116.380
N6 C2 H8 116.262 N6 C4 H10 116.380
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.198      
2 C 0.161      
3 C 0.038      
4 C 0.038      
5 N -0.402      
6 N -0.402      
7 H 0.190      
8 H 0.191      
9 H 0.191      
10 H 0.191      


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 2.329 2.329
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> 114.093
(<r2>)1/2 10.681