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: B1B95/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 B1B95/CEP-31G
 hartrees
Energy at 0K-44.653573
Energy at 298.15K-44.659429
Nuclear repulsion energy104.085621
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 B1B95/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 3260 3122 6.72      
2 A1 3250 3112 33.08      
3 A1 3215 3079 12.65      
4 A1 1590 1522 25.51      
5 A1 1421 1360 62.91      
6 A1 1147 1098 1.01      
7 A1 1066 1020 0.77      
8 A1 980 939 1.00      
9 A1 670 642 6.09      
10 A2 1009 966 0.00      
11 A2 406 389 0.00      
12 B1 1052 1008 0.04      
13 B1 1025 981 0.52      
14 B1 839 803 22.91      
15 B1 754 722 45.46      
16 B1 347 332 5.05      
17 B2 3221 3085 27.19      
18 B2 1601 1533 64.81      
19 B2 1470 1408 11.48      
20 B2 1387 1328 0.14      
21 B2 1256 1203 1.90      
22 B2 1228 1176 4.99      
23 B2 1082 1036 6.14      
24 B2 617 591 8.53      

Unscaled Zero Point Vibrational Energy (zpe) 16946.6 cm-1
Scaled (by 0.9575) Zero Point Vibrational Energy (zpe) 16226.4 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 B1B95/CEP-31G
ABC
0.20187 0.19588 0.09941

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/CEP-31G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.382
C2 0.000 0.000 -1.338
C3 0.000 1.208 0.635
C4 0.000 -1.208 0.635
N5 0.000 1.217 -0.727
N6 0.000 -1.217 -0.727
H7 0.000 0.000 2.472
H8 0.000 0.000 -2.428
H9 0.000 2.184 1.126
H10 0.000 -2.184 1.126

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.72031.42001.42002.43542.43541.08933.81072.19852.1985
C22.72032.31352.31351.36131.36133.80961.09033.29213.2921
C31.42002.31352.41521.36272.78102.19783.29301.09233.4264
C41.42002.31352.41522.78101.36272.19783.29303.42641.0923
N52.43541.36131.36272.78102.43333.42262.09122.09033.8724
N62.43541.36132.78101.36272.43333.42262.09123.87242.0903
H71.08933.80962.19782.19783.42263.42264.90002.56492.5649
H83.81071.09033.29303.29302.09122.09124.90004.17134.1713
H92.19853.29211.09233.42642.09033.87242.56494.17134.3670
H102.19853.29213.42641.09233.87242.09032.56494.17134.3670

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 122.124 C1 C3 H9 121.572
C1 C4 N6 122.124 C1 C4 H10 121.572
C2 N5 C3 116.269 C2 N6 C4 116.269
C3 C1 C4 116.514 C3 C1 H7 121.743
C4 C1 H7 121.743 N5 C2 N6 126.700
N5 C2 H8 116.650 N5 C3 H9 116.304
N6 C2 H8 116.650 N6 C4 H10 116.304
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.137      
2 C -0.584      
3 C -0.599      
4 C -0.599      
5 N 0.284      
6 N 0.284      
7 H 0.308      
8 H 0.257      
9 H 0.255      
10 H 0.255      


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 2.946 2.946
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -35.839 0.000 0.000
y 0.000 -38.377 0.000
z 0.000 0.000 -30.294
Traceless
 xyz
x -1.503 0.000 0.000
y 0.000 -5.311 0.000
z 0.000 0.000 6.814
Polar
3z2-r213.628
x2-y22.538
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 3.553 0.000 0.000
y 0.000 8.444 0.000
z 0.000 0.000 8.932


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000