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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-43.991356
Energy at 298.15K-43.997096
HF Energy-43.481858
Nuclear repulsion energy102.259562
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 3247 3137 15.52      
2 A1 3218 3110 37.41      
3 A1 3186 3078 0.83      
4 A1 1517 1466 2.88      
5 A1 1370 1324 50.59      
6 A1 1113 1075 3.77      
7 A1 1048 1012 0.25      
8 A1 935 903 0.08      
9 A1 664 641 6.10      
10 A2 918 887 0.00      
11 A2 404 391 0.00      
12 B1 964 931 0.56      
13 B1 912 881 0.79      
14 B1 795 768 31.37      
15 B1 740 715 36.67      
16 B1 351 339 5.06      
17 B2 3201 3093 31.48      
18 B2 1543 1491 35.63      
19 B2 1443 1394 9.61      
20 B2 1370 1324 0.42      
21 B2 1207 1166 2.61      
22 B2 1180 1140 0.01      
23 B2 1038 1003 5.47      
24 B2 618 597 9.04      

Unscaled Zero Point Vibrational Energy (zpe) 16489.5 cm-1
Scaled (by 0.9663) Zero Point Vibrational Energy (zpe) 15933.8 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 MP2/CEP-31G
ABC
0.19494 0.18835 0.09579

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 1.403
C2 0.000 0.000 -1.364
C3 0.000 1.229 0.652
C4 0.000 -1.229 0.652
N5 0.000 1.244 -0.741
N6 0.000 -1.244 -0.741
H7 0.000 0.000 2.501
H8 0.000 0.000 -2.460
H9 0.000 2.213 1.142
H10 0.000 -2.213 1.142

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.76631.44061.44062.47902.47901.09803.86222.22822.2282
C22.76632.36072.36071.39111.39113.86431.09593.34273.3427
C31.44062.36072.45881.39332.83902.22043.34541.09883.4770
C41.44062.36072.45882.83901.39332.22043.34543.47701.0988
N52.47901.39111.39332.83902.48853.47282.12132.11783.9368
N62.47901.39112.83901.39332.48853.47282.12133.93682.1178
H71.09803.86432.22042.22043.47283.47284.96022.59682.5968
H83.86221.09593.34543.34542.12132.12134.96024.22684.2268
H92.22823.34271.09883.47702.11783.93682.59684.22684.4257
H102.22823.34273.47701.09883.93682.11782.59684.22684.4257

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 122.028 C1 C3 H9 122.097
C1 C4 N6 122.028 C1 C4 H10 122.097
C2 N5 C3 115.955 C2 N6 C4 115.955
C3 C1 C4 117.166 C3 C1 H7 121.417
C4 C1 H7 121.417 N5 C2 N6 126.869
N5 C2 H8 116.565 N5 C3 H9 115.875
N6 C2 H8 116.565 N6 C4 H10 115.875
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability