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

using model chemistry: MP2/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/6-311G*
 hartrees
Energy at 0K-263.597074
Energy at 298.15K-263.602925
HF Energy-262.740498
Nuclear repulsion energy208.293772
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 MP2/6-311G*
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 3246 3085 7.15      
2 A1 3222 3062 17.08      
3 A1 3202 3043 9.69      
4 A1 1616 1536 16.65      
5 A1 1439 1368 49.36      
6 A1 1161 1103 2.23      
7 A1 1078 1025 1.41      
8 A1 1013 963 3.91      
9 A1 688 654 4.52      
10 A2 966 918 0.00      
11 A2 403 383 0.00      
12 B1 978 929 0.02      
13 B1 952 905 0.22      
14 B1 811 771 12.87      
15 B1 740 703 41.34      
16 B1 346 329 3.21      
17 B2 3206 3047 19.40      
18 B2 1624 1543 49.18      
19 B2 1500 1425 7.23      
20 B2 1401 1332 0.15      
21 B2 1322 1256 0.80      
22 B2 1248 1186 5.83      
23 B2 1100 1045 5.55      
24 B2 626 595 11.28      

Unscaled Zero Point Vibrational Energy (zpe) 16943.8 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 16101.7 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 MP2/6-311G*
ABC
0.20906 0.20116 0.10252

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.355
C2 0.000 0.000 -1.310
C3 0.000 1.188 0.624
C4 0.000 -1.188 0.624
N5 0.000 1.203 -0.717
N6 0.000 -1.203 -0.717
H7 0.000 0.000 2.440
H8 0.000 0.000 -2.397
H9 0.000 2.158 1.118
H10 0.000 -2.158 1.118

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.66501.39511.39512.39612.39611.08493.75232.17112.1711
C22.66502.26992.26991.34091.34093.74991.08733.24843.2484
C31.39512.26992.37661.34142.74162.17013.24661.08833.3827
C41.39512.26992.37662.74161.34142.17013.24663.38271.0883
N52.39611.34091.34142.74162.40563.37862.06622.06903.8293
N62.39611.34092.74161.34142.40563.37862.06623.82932.0690
H71.08493.74992.17012.17013.37863.37864.83722.53082.5308
H83.75231.08733.24663.24662.06622.06624.83724.12484.1248
H92.17113.24841.08833.38272.06903.82932.53084.12484.3162
H102.17113.24843.38271.08833.82932.06902.53084.12484.3162

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 122.217 C1 C3 H9 121.415
C1 C4 N6 122.217 C1 C4 H10 121.415
C2 N5 C3 115.614 C2 N6 C4 115.614
C3 C1 C4 116.806 C3 C1 H7 121.597
C4 C1 H7 121.597 N5 C2 N6 127.534
N5 C2 H8 116.233 N5 C3 H9 116.368
N6 C2 H8 116.233 N6 C4 H10 116.368
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability