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

using model chemistry: MP2/CEP-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 MP2/CEP-31G*
 hartrees
Energy at 0K-44.400053
Energy at 298.15K-44.405884
HF Energy-43.624664
Nuclear repulsion energy104.277838
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/CEP-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 3246 3082 7.51      
2 A1 3233 3069 21.64      
3 A1 3204 3041 13.57      
4 A1 1607 1526 18.75      
5 A1 1423 1351 48.59      
6 A1 1149 1091 1.28      
7 A1 1067 1013 1.04      
8 A1 998 947 2.34      
9 A1 676 642 5.03      
10 A2 964 915 0.00      
11 A2 406 386 0.00      
12 B1 995 945 0.05      
13 B1 967 918 0.03      
14 B1 821 780 27.94      
15 B1 752 714 37.50      
16 B1 355 337 3.73      
17 B2 3209 3046 24.51      
18 B2 1627 1544 49.58      
19 B2 1486 1411 5.79      
20 B2 1385 1315 0.13      
21 B2 1336 1269 0.66      
22 B2 1233 1171 5.96      
23 B2 1086 1031 6.51      
24 B2 619 587 9.59      

Unscaled Zero Point Vibrational Energy (zpe) 16920.5 cm-1
Scaled (by 0.9494) Zero Point Vibrational Energy (zpe) 16064.3 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/CEP-31G*
ABC
0.20402 0.19561 0.09986

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-31G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.368
C2 0.000 0.000 -1.332
C3 0.000 1.206 0.620
C4 0.000 -1.206 0.620
N5 0.000 1.220 -0.737
N6 0.000 -1.220 -0.737
H7 0.000 0.000 2.462
H8 0.000 0.000 -2.428
H9 0.000 2.185 1.115
H10 0.000 -2.185 1.115

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.69981.41851.41852.43282.43281.09373.79612.20002.2000
C22.69982.29452.29451.35721.35723.79351.09633.28063.2806
C31.41852.29452.41111.35742.77932.20083.27831.09753.4268
C41.41852.29452.41112.77931.35742.20083.27833.42681.0975
N52.43281.35721.35742.77932.43963.42322.08532.08833.8761
N62.43281.35722.77931.35742.43963.42322.08533.87612.0883
H71.09373.79352.20082.20083.42323.42324.88982.56712.5671
H83.79611.09633.27833.27832.08532.08534.88984.16284.1628
H92.20003.28061.09753.42682.08833.87612.56714.16284.3708
H102.20003.28063.42681.09753.87612.08832.56714.16284.3708

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 122.404 C1 C3 H9 121.423
C1 C4 N6 122.404 C1 C4 H10 121.423
C2 N5 C3 115.401 C2 N6 C4 115.401
C3 C1 C4 116.395 C3 C1 H7 121.803
C4 C1 H7 121.803 N5 C2 N6 127.995
N5 C2 H8 116.002 N5 C3 H9 116.173
N6 C2 H8 116.002 N6 C4 H10 116.173
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability