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

using model chemistry: B1B95/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/6-31G**
 hartrees
Energy at 0K-264.221325
Energy at 298.15K-264.227195
Nuclear repulsion energy209.437629
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 B1B95/6-31G**
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 3241 3095 7.06      
2 A1 3196 3051 19.49      
3 A1 3183 3040 15.10      
4 A1 1649 1574 47.96      
5 A1 1454 1388 53.66      
6 A1 1173 1120 1.66      
7 A1 1086 1037 0.71      
8 A1 1017 971 5.75      
9 A1 689 658 4.24      
10 A2 1005 959 0.00      
11 A2 403 385 0.00      
12 B1 1026 980 0.01      
13 B1 983 938 0.07      
14 B1 826 789 2.82      
15 B1 738 705 35.44      
16 B1 345 330 3.15      
17 B2 3186 3042 27.55      
18 B2 1648 1574 79.99      
19 B2 1509 1441 8.72      
20 B2 1397 1334 0.16      
21 B2 1294 1236 1.61      
22 B2 1245 1189 7.92      
23 B2 1103 1054 2.83      
24 B2 622 594 11.22      

Unscaled Zero Point Vibrational Energy (zpe) 17009.6 cm-1
Scaled (by 0.9548) Zero Point Vibrational Energy (zpe) 16240.8 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 B1B95/6-31G**
ABC
0.21089 0.20394 0.10368

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/6-31G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.351
C2 0.000 0.000 -1.303
C3 0.000 1.180 0.619
C4 0.000 -1.180 0.619
N5 0.000 1.194 -0.714
N6 0.000 -1.194 -0.714
H7 0.000 0.000 2.435
H8 0.000 0.000 -2.390
H9 0.000 2.148 1.115
H10 0.000 -2.148 1.115

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.65451.38851.38852.38592.38591.08313.74162.16072.1607
C22.65452.25532.25531.33191.33193.73751.08713.23383.2338
C31.38852.25532.35941.33312.72282.16503.23231.08743.3641
C41.38852.25532.35942.72281.33312.16503.23233.36411.0874
N52.38591.33191.33312.72282.38903.36742.05832.06213.8097
N62.38591.33192.72281.33312.38903.36742.05833.80972.0621
H71.08313.73752.16502.16503.36743.36744.82462.52082.5208
H83.74161.08713.23233.23232.05832.05834.82464.11054.1105
H92.16073.23381.08743.36412.06213.80972.52084.11054.2954
H102.16073.23383.36411.08743.80972.06212.52084.11054.2954

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 122.464 C1 C3 H9 121.065
C1 C4 N6 122.464 C1 C4 H10 121.065
C2 N5 C3 115.618 C2 N6 C4 115.618
C3 C1 C4 116.342 C3 C1 H7 121.829
C4 C1 H7 121.829 N5 C2 N6 127.494
N5 C2 H8 116.253 N5 C3 H9 116.471
N6 C2 H8 116.253 N6 C4 H10 116.471
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.130      
2 C 0.218      
3 C 0.093      
4 C 0.093      
5 N -0.406      
6 N -0.406      
7 H 0.130      
8 H 0.137      
9 H 0.135      
10 H 0.135      


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 2.288 2.288
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -35.076 0.000 0.000
y 0.000 -36.237 0.000
z 0.000 0.000 -30.090
Traceless
 xyz
x -1.913 0.000 0.000
y 0.000 -3.654 0.000
z 0.000 0.000 5.567
Polar
3z2-r211.134
x2-y21.161
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.079 0.000 0.000
y 0.000 8.390 0.000
z 0.000 0.000 9.065


<r2> (average value of r2) Å2
<r2> 114.018
(<r2>)1/2 10.678