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

using model chemistry: TPSSh/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at TPSSh/6-31G(2df,p)
 hartrees
Energy at 0K-264.357543
Energy at 298.15K-264.363395
HF Energy-264.357543
Nuclear repulsion energy208.787500
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 TPSSh/6-31G(2df,p)
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 3202 3090 13.01      
2 A1 3163 3052 21.44      
3 A1 3150 3040 14.20      
4 A1 1606 1550 37.64      
5 A1 1433 1383 55.94      
6 A1 1159 1119 3.15      
7 A1 1076 1038 1.22      
8 A1 1001 966 4.83      
9 A1 682 658 3.72      
10 A2 1007 971 0.00      
11 A2 398 384 0.00      
12 B1 1026 990 0.00      
13 B1 983 948 0.11      
14 B1 828 799 2.68      
15 B1 740 714 32.00      
16 B1 339 328 2.91      
17 B2 3153 3042 30.41      
18 B2 1606 1550 77.77      
19 B2 1493 1441 8.79      
20 B2 1393 1344 0.30      
21 B2 1263 1219 3.79      
22 B2 1231 1188 5.39      
23 B2 1091 1053 2.75      
24 B2 617 595 12.11      

Unscaled Zero Point Vibrational Energy (zpe) 16818.5 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 16229.8 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 TPSSh/6-31G(2df,p)
ABC
0.20976 0.20246 0.10302

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.354
C2 0.000 0.000 -1.305
C3 0.000 1.183 0.621
C4 0.000 -1.183 0.621
N5 0.000 1.200 -0.716
N6 0.000 -1.200 -0.716
H7 0.000 0.000 2.439
H8 0.000 0.000 -2.392
H9 0.000 2.152 1.116
H10 0.000 -2.152 1.116

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.65941.39161.39162.39362.39361.08423.74682.16532.1653
C22.65942.26082.26081.33691.33693.74361.08743.23933.2393
C31.39162.26082.36601.33812.73332.16823.23781.08803.3716
C41.39162.26082.36602.73331.33812.16823.23783.37161.0880
N52.39361.33691.33812.73332.40083.37572.06152.06483.8206
N62.39361.33692.73331.33812.40083.37572.06153.82062.0648
H71.08423.74362.16822.16823.37573.37574.83102.52612.5261
H83.74681.08743.23783.23782.06152.06154.83104.11594.1159
H92.16533.23931.08803.37162.06483.82062.52614.11594.3044
H102.16533.23933.37161.08803.82062.06482.52614.11594.3044

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 122.522 C1 C3 H9 121.197
C1 C4 N6 122.522 C1 C4 H10 121.197
C2 N5 C3 115.375 C2 N6 C4 115.375
C3 C1 C4 116.446 C3 C1 H7 121.777
C4 C1 H7 121.777 N5 C2 N6 127.759
N5 C2 H8 116.120 N5 C3 H9 116.281
N6 C2 H8 116.120 N6 C4 H10 116.281
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability