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

using model chemistry: B1B95/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B1B95/3-21G
 hartrees
Energy at 0K-262.738795
Energy at 298.15K-262.744747
Nuclear repulsion energy208.073970
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 B1B95/3-21G
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 3258 3117 3.37      
2 A1 3239 3099 18.87      
3 A1 3214 3075 5.87      
4 A1 1575 1507 14.77      
5 A1 1429 1368 70.35      
6 A1 1173 1122 7.35      
7 A1 1096 1048 0.12      
8 A1 989 946 1.73      
9 A1 704 673 5.42      
10 A2 1030 986 0.00      
11 A2 421 403 0.00      
12 B1 1075 1028 0.03      
13 B1 1021 977 0.16      
14 B1 852 815 8.95      
15 B1 769 736 53.27      
16 B1 361 345 3.95      
17 B2 3217 3078 21.58      
18 B2 1579 1510 58.64      
19 B2 1493 1428 9.96      
20 B2 1416 1354 0.51      
21 B2 1255 1201 6.24      
22 B2 1171 1120 0.33      
23 B2 1091 1043 2.77      
24 B2 640 613 11.80      

Unscaled Zero Point Vibrational Energy (zpe) 17033.1 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 16295.6 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 B1B95/3-21G
ABC
0.20675 0.20246 0.10229

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.358
C2 0.000 0.000 -1.327
C3 0.000 1.186 0.631
C4 0.000 -1.186 0.631
N5 0.000 1.198 -0.717
N6 0.000 -1.198 -0.717
H7 0.000 0.000 2.438
H8 0.000 0.000 -2.408
H9 0.000 2.148 1.127
H10 0.000 -2.148 1.127

Atom - Atom Distances (Å)
  C1 C2 C3 C4 N5 N6 H7 H8 H9 H10
C12.68501.39091.39092.39592.39591.08073.76592.16022.1602
C22.68502.28902.28901.34481.34483.76571.08093.26183.2618
C31.39092.28902.37151.34772.73862.16203.26191.08283.3705
C41.39092.28902.37152.73861.34772.16203.26193.37051.0828
N52.39591.34481.34772.73862.39683.37532.07272.07453.8209
N62.39591.34482.73861.34772.39683.37532.07273.82092.0745
H71.08073.76572.16202.16203.37533.37534.84662.51642.5164
H83.76591.08093.26193.26192.07272.07274.84664.13694.1369
H92.16023.26181.08283.37052.07453.82092.51644.13694.2958
H102.16023.26183.37051.08283.82092.07452.51644.13694.2958

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 122.053 C1 C3 H9 121.175
C1 C4 N6 122.053 C1 C4 H10 121.175
C2 N5 C3 116.452 C2 N6 C4 116.452
C3 C1 C4 116.969 C3 C1 H7 121.516
C4 C1 H7 121.516 N5 C2 N6 126.022
N5 C2 H8 116.989 N5 C3 H9 116.772
N6 C2 H8 116.989 N6 C4 H10 116.772
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.280      
2 C 0.198      
3 C 0.052      
4 C 0.052      
5 N -0.501      
6 N -0.501      
7 H 0.228      
8 H 0.256      
9 H 0.247      
10 H 0.247      


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 2.376 2.376
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -36.053 0.000 0.000
y 0.000 -36.796 0.000
z 0.000 0.000 -30.009
Traceless
 xyz
x -2.651 0.000 0.000
y 0.000 -3.765 0.000
z 0.000 0.000 6.415
Polar
3z2-r212.831
x2-y20.743
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.343 0.000 0.000
y 0.000 7.685 0.000
z 0.000 0.000 8.543


<r2> (average value of r2) Å2
<r2> 115.505
(<r2>)1/2 10.747