return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: MP2/TZVP

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/TZVP
 hartrees
Energy at 0K-263.645256
Energy at 298.15K 
HF Energy-262.767657
Nuclear repulsion energy208.914222
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/TZVP
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 3259 3090 5.48      
2 A1 3234 3065 12.94      
3 A1 3215 3048 10.61      
4 A1 1614 1530 18.31      
5 A1 1446 1371 47.80      
6 A1 1167 1107 2.36      
7 A1 1086 1029 0.61      
8 A1 1016 963 2.71      
9 A1 693 657 3.75      
10 A2 856 811 0.00      
11 A2 377 357 0.00      
12 B1 884 838 0.17      
13 B1 803 761 0.21      
14 B1 750 711 37.80      
15 B1 518 491 10.57      
16 B1 136i 129i 0.24      
17 B2 3219 3051 15.43      
18 B2 1618 1534 48.48      
19 B2 1506 1427 5.92      
20 B2 1417 1343 0.07      
21 B2 1307 1239 1.07      
22 B2 1252 1187 6.29      
23 B2 1098 1041 4.58      
24 B2 633 600 9.52      

Unscaled Zero Point Vibrational Energy (zpe) 16415.1 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 15559.8 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/TZVP
ABC
0.20990 0.20276 0.10313

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.344
C2 0.000 0.000 -1.303
C3 0.000 1.189 0.621
C4 0.000 -1.189 0.621
N5 0.000 1.200 -0.712
N6 0.000 -1.200 -0.712
H7 0.000 0.000 2.422
H8 0.000 0.000 -2.379
H9 0.000 2.145 1.118
H10 0.000 -2.145 1.118

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.64731.39131.39132.38032.38031.07863.72302.15682.1568
C22.64732.26162.26161.33771.33773.72591.07573.23463.2346
C31.39132.26162.37721.33262.73502.15853.22671.07783.3704
C41.39132.26162.37722.73501.33262.15853.22673.37041.0778
N52.38031.33771.33262.73502.39973.35622.05412.05933.8125
N62.38031.33772.73501.33262.39973.35622.05413.81252.0593
H71.07863.72592.15852.15853.35623.35624.80162.51062.5106
H83.72301.07573.22673.22672.05412.05414.80164.10224.1022
H92.15683.23461.07783.37042.05933.81252.51064.10224.2899
H102.15683.23463.37041.07783.81252.05932.51064.10224.2899

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 121.802 C1 C3 H9 121.219
C1 C4 N6 121.802 C1 C4 H10 121.219
C2 N5 C3 115.761 C2 N6 C4 115.761
C3 C1 C4 117.362 C3 C1 H7 121.319
C4 C1 H7 121.319 N5 C2 N6 127.513
N5 C2 H8 116.243 N5 C3 H9 116.980
N6 C2 H8 116.243 N6 C4 H10 116.980
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability