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

using model chemistry: mPW1PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/6-311G*
 hartrees
Energy at 0K-264.308916
Energy at 298.15K-264.314831
Nuclear repulsion energy209.763001
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 mPW1PW91/6-311G*
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 3233 3085 12.19      
2 A1 3201 3055 23.31      
3 A1 3183 3037 15.19      
4 A1 1648 1573 49.61      
5 A1 1457 1390 59.94      
6 A1 1178 1124 0.95      
7 A1 1092 1042 1.36      
8 A1 1026 979 5.39      
9 A1 700 669 3.99      
10 A2 1009 963 0.00      
11 A2 410 391 0.00      
12 B1 1032 985 0.00      
13 B1 990 945 0.04      
14 B1 833 795 5.17      
15 B1 744 710 46.93      
16 B1 353 337 2.98      
17 B2 3186 3041 30.27      
18 B2 1649 1573 88.33      
19 B2 1515 1446 8.92      
20 B2 1405 1341 0.34      
21 B2 1284 1225 3.58      
22 B2 1244 1187 8.48      
23 B2 1108 1057 3.79      
24 B2 635 606 11.06      

Unscaled Zero Point Vibrational Energy (zpe) 17055.7 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 16278.0 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 mPW1PW91/6-311G*
ABC
0.21158 0.20457 0.10401

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.349
C2 0.000 0.000 -1.301
C3 0.000 1.179 0.618
C4 0.000 -1.179 0.618
N5 0.000 1.192 -0.712
N6 0.000 -1.192 -0.712
H7 0.000 0.000 2.432
H8 0.000 0.000 -2.387
H9 0.000 2.147 1.110
H10 0.000 -2.147 1.110

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.65071.38701.38702.38142.38141.08293.73672.16072.1607
C22.65072.25232.25231.32941.32943.73361.08603.22893.2289
C31.38702.25232.35701.33042.71812.16343.22821.08673.3621
C41.38702.25232.35702.71811.33042.16343.22823.36211.0867
N52.38141.32941.33042.71812.38363.36292.05572.05773.8041
N62.38141.32942.71811.33042.38363.36292.05573.80412.0577
H71.08293.73362.16342.16343.36293.36294.81962.52192.5219
H83.73671.08603.22823.22822.05572.05574.81964.10404.1040
H92.16073.22891.08673.36212.05773.80412.52194.10404.2949
H102.16073.22893.36211.08673.80412.05772.52194.10404.2949

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 122.394 C1 C3 H9 121.260
C1 C4 N6 122.394 C1 C4 H10 121.260
C2 N5 C3 115.727 C2 N6 C4 115.727
C3 C1 C4 116.355 C3 C1 H7 121.822
C4 C1 H7 121.822 N5 C2 N6 127.402
N5 C2 H8 116.299 N5 C3 H9 116.346
N6 C2 H8 116.299 N6 C4 H10 116.346
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.322      
2 C 0.039      
3 C -0.001      
4 C -0.001      
5 N -0.302      
6 N -0.302      
7 H 0.216      
8 H 0.223      
9 H 0.225      
10 H 0.225      


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 2.320 2.320
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> 113.972
(<r2>)1/2 10.676