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

using model chemistry: mPW1PW91/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at mPW1PW91/6-31+G**
 hartrees
Energy at 0K-264.270217
Energy at 298.15K-264.276119
Nuclear repulsion energy209.268654
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 mPW1PW91/6-31+G**
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 3250 3093 6.87      
2 A1 3220 3065 14.14      
3 A1 3202 3048 12.56      
4 A1 1652 1572 53.76      
5 A1 1458 1388 54.04      
6 A1 1177 1121 0.50      
7 A1 1090 1038 0.72      
8 A1 1025 976 3.99      
9 A1 697 663 3.53      
10 A2 1011 962 0.00      
11 A2 406 387 0.00      
12 B1 1034 984 0.00      
13 B1 990 942 0.01      
14 B1 828 788 7.60      
15 B1 739 703 45.70      
16 B1 350 333 3.48      
17 B2 3206 3051 18.05      
18 B2 1649 1569 88.38      
19 B2 1511 1439 6.78      
20 B2 1401 1333 0.22      
21 B2 1296 1234 1.33      
22 B2 1249 1189 11.00      
23 B2 1106 1053 3.67      
24 B2 633 602 9.96      

Unscaled Zero Point Vibrational Energy (zpe) 17089.1 cm-1
Scaled (by 0.9518) Zero Point Vibrational Energy (zpe) 16265.4 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 mPW1PW91/6-31+G**
ABC
0.21038 0.20374 0.10350

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

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 -1.306
C3 0.000 1.182 0.620
C4 0.000 -1.182 0.620
N5 0.000 1.194 -0.714
N6 0.000 -1.194 -0.714
H7 0.000 0.000 2.437
H8 0.000 0.000 -2.393
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
C12.65941.39041.39042.38692.38691.08363.74572.16372.1637
C22.65942.25982.25981.33291.33293.74301.08633.23683.2368
C31.39042.25982.36301.33392.72432.16703.23611.08703.3681
C41.39042.25982.36302.72431.33392.16703.23613.36811.0870
N52.38691.33291.33392.72432.38783.36902.06012.06203.8106
N62.38691.33292.72431.33392.38783.36902.06013.81062.0620
H71.08363.74302.16702.16703.36903.36904.82922.52502.5250
H83.74571.08633.23613.23612.06012.06014.82924.11254.1125
H92.16373.23681.08703.36812.06203.81062.52504.11254.3006
H102.16373.23683.36811.08703.81062.06202.52504.11254.3006

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 122.348 C1 C3 H9 121.217
C1 C4 N6 122.348 C1 C4 H10 121.217
C2 N5 C3 115.865 C2 N6 C4 115.865
C3 C1 C4 116.368 C3 C1 H7 121.816
C4 C1 H7 121.816 N5 C2 N6 127.207
N5 C2 H8 116.397 N5 C3 H9 116.435
N6 C2 H8 116.397 N6 C4 H10 116.435
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31+G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.137      
2 C -0.013      
3 C -0.242      
4 C -0.242      
5 N -0.158      
6 N -0.158      
7 H 0.178      
8 H 0.163      
9 H 0.168      
10 H 0.168      


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 2.471 2.471
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> 114.728
(<r2>)1/2 10.711