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

using model chemistry: HF/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/aug-cc-pVDZ
 hartrees
Energy at 0K-262.726926
Energy at 298.15K-262.733122
Nuclear repulsion energy210.657184
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 HF/aug-cc-pVDZ
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3380 3077 7.32      
2 A1 3356 3056 20.20      
3 A1 3334 3036 11.89      
4 A1 1779 1620 100.30      
5 A1 1550 1411 82.04      
6 A1 1245 1134 0.84      
7 A1 1155 1052 2.41      
8 A1 1093 995 4.84      
9 A1 744 678 2.96      
10 A2 1120 1020 0.00      
11 A2 456 415 0.00      
12 B1 1148 1045 0.00      
13 B1 1084 987 0.35      
14 B1 896 816 9.02      
15 B1 779 709 54.52      
16 B1 408 372 3.25      
17 B2 3339 3040 24.40      
18 B2 1782 1623 140.40      
19 B2 1616 1472 19.51      
20 B2 1494 1361 1.22      
21 B2 1339 1219 11.09      
22 B2 1201 1093 13.27      
23 B2 1152 1049 3.74      
24 B2 680 619 13.23      

Unscaled Zero Point Vibrational Energy (zpe) 18063.4 cm-1
Scaled (by 0.9106) Zero Point Vibrational Energy (zpe) 16448.5 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 HF/aug-cc-pVDZ
ABC
0.21280 0.20680 0.10488

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/aug-cc-pVDZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.348
C2 0.000 0.000 -1.299
C3 0.000 1.175 0.614
C4 0.000 -1.175 0.614
N5 0.000 1.182 -0.709
N6 0.000 -1.182 -0.709
H7 0.000 0.000 2.426
H8 0.000 0.000 -2.379
H9 0.000 2.139 1.105
H10 0.000 -2.139 1.105

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.64691.38531.38532.37252.37251.07843.72712.15302.1530
C22.64692.24532.24531.32141.32143.72531.08023.21803.2180
C31.38532.24532.35021.32322.70342.15983.21581.08193.3505
C41.38532.24532.35022.70341.32322.15983.21583.35051.0819
N52.37251.32141.32322.70342.36473.35082.04642.05083.7846
N62.37251.32142.70341.32322.36473.35082.04643.78462.0508
H71.07843.72532.15982.15983.35083.35084.80562.51452.5145
H83.72711.08023.21583.21582.04642.04644.80564.08854.0885
H92.15303.21801.08193.35052.05083.78462.51454.08854.2786
H102.15303.21803.35051.08193.78462.05082.51454.08854.2786

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 122.293 C1 C3 H9 121.049
C1 C4 N6 122.293 C1 C4 H10 121.049
C2 N5 C3 116.207 C2 N6 C4 116.207
C3 C1 C4 116.042 C3 C1 H7 121.979
C4 C1 H7 121.979 N5 C2 N6 126.959
N5 C2 H8 116.521 N5 C3 H9 116.658
N6 C2 H8 116.521 N6 C4 H10 116.658
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/aug-cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.745      
2 C 0.704      
3 C 0.515      
4 C 0.515      
5 N -0.682      
6 N -0.682      
7 H -0.374      
8 H -0.207      
9 H -0.268      
10 H -0.268      


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 2.388 2.388
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> 113.697
(<r2>)1/2 10.663