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: HF/LANL2DZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at HF/LANL2DZ
 hartrees
Energy at 0K-262.593282
Energy at 298.15K-262.599510
Nuclear repulsion energy208.993419
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 HF/LANL2DZ
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 3465 3118 8.57      
2 A1 3453 3107 28.06      
3 A1 3422 3080 4.71      
4 A1 1751 1576 55.89      
5 A1 1553 1397 82.70      
6 A1 1244 1119 1.80      
7 A1 1156 1040 2.07      
8 A1 1073 965 3.11      
9 A1 748 673 6.01      
10 A2 1118 1006 0.00      
11 A2 479 431 0.00      
12 B1 1154 1039 0.36      
13 B1 1097 987 0.46      
14 B1 918 826 15.66      
15 B1 819 737 71.20      
16 B1 432 389 4.40      
17 B2 3429 3086 23.46      
18 B2 1748 1573 98.64      
19 B2 1615 1453 18.74      
20 B2 1510 1359 1.23      
21 B2 1345 1210 11.12      
22 B2 1212 1091 9.43      
23 B2 1175 1058 3.12      
24 B2 690 621 13.97      

Unscaled Zero Point Vibrational Energy (zpe) 18302.0 cm-1
Scaled (by 0.8999) Zero Point Vibrational Energy (zpe) 16469.9 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 HF/LANL2DZ
ABC
0.20786 0.20461 0.10311

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/LANL2DZ

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.359
C2 0.000 0.000 -1.329
C3 0.000 1.187 0.628
C4 0.000 -1.187 0.628
N5 0.000 1.184 -0.711
N6 0.000 -1.184 -0.711
H7 0.000 0.000 2.428
H8 0.000 0.000 -2.396
H9 0.000 2.144 1.107
H10 0.000 -2.144 1.107

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.68751.39421.39422.38482.38481.06903.75492.15912.1591
C22.68752.28872.28871.33571.33573.75641.06743.24493.2449
C31.39422.28872.37461.33912.72362.15613.24881.07013.3658
C41.39422.28872.37462.72361.33912.15613.24883.36581.0701
N52.38481.33571.33912.72362.36883.35492.05962.05573.7928
N62.38481.33572.72361.33912.36883.35492.05963.79282.0557
H71.06903.75642.15612.15613.35493.35494.82382.51862.5186
H83.75491.06743.24883.24882.05962.05964.82384.10714.1071
H92.15913.24491.07013.36582.05573.79282.51864.10714.2887
H102.15913.24493.36581.07013.79282.05572.51864.10714.2887

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 121.491 C1 C3 H9 121.811
C1 C4 N6 121.491 C1 C4 H10 121.811
C2 N5 C3 117.661 C2 N6 C4 117.661
C3 C1 C4 116.773 C3 C1 H7 121.614
C4 C1 H7 121.614 N5 C2 N6 124.924
N5 C2 H8 117.538 N5 C3 H9 116.699
N6 C2 H8 117.538 N6 C4 H10 116.699
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/LANL2DZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.210      
2 C -0.106      
3 C -0.112      
4 C -0.112      
5 N -0.199      
6 N -0.199      
7 H 0.224      
8 H 0.239      
9 H 0.237      
10 H 0.237      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 2.883 2.883
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.148 0.000 0.000
y 0.000 8.047 0.000
z 0.000 0.000 8.502


<r2> (average value of r2) Å2
<r2> 115.722
(<r2>)1/2 10.757