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All results from a given calculation for C3H4N2 (1H-Pyrazole)

using model chemistry: B3LYP/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/3-21G*
 hartrees
Energy at 0K-224.941313
Energy at 298.15K-224.947346
Nuclear repulsion energy 
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 B3LYP/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 A' 3622 3484 82.92      
2 A' 3314 3188 0.21      
3 A' 3289 3164 1.14      
4 A' 3283 3158 3.29      
5 A' 1540 1482 13.93      
6 A' 1439 1385 10.82      
7 A' 1397 1344 7.85      
8 A' 1357 1306 3.88      
9 A' 1247 1200 2.08      
10 A' 1151 1108 5.79      
11 A' 1124 1082 18.69      
12 A' 1068 1028 5.56      
13 A' 982 945 9.61      
14 A' 954 918 4.36      
15 A' 927 892 23.42      
16 A" 945 909 0.57      
17 A" 883 850 12.73      
18 A" 785 755 83.88      
19 A" 681 655 36.84      
20 A" 655 630 4.57      
21 A" 582 560 88.59      

Unscaled Zero Point Vibrational Energy (zpe) 15613.3 cm-1
Scaled (by 0.962) Zero Point Vibrational Energy (zpe) 15020.0 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 B3LYP/3-21G*
ABC
0.31412 0.30646 0.15512

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.118 0.726 0.000
C2 1.121 0.320 0.000
H3 1.287 -1.880 0.000
C4 0.680 -0.992 0.000
H5 -1.444 -1.726 0.000
C6 -0.737 -0.913 0.000
N7 -1.183 0.358 0.000
H8 -0.064 2.117 0.000
N9 0.000 1.110 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 C6 N7 H8 N9
H11.07642.73502.23994.32413.29233.32112.58762.1522
C21.07642.20541.38343.28072.23012.30432.15321.3714
H32.73502.20541.07532.73512.24273.33294.21903.2543
C42.23991.38341.07532.24751.41962.30093.19682.2086
H54.32413.28072.73512.24751.07682.10054.08333.1819
C63.29232.23012.24271.41961.07681.34773.10462.1532
N73.32112.30433.33292.30092.10051.34772.08461.4013
H82.58762.15324.21903.19684.08333.10462.08461.0097
N92.15221.37143.25432.20863.18192.15321.40131.0097

picture of 1H-Pyrazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 C2 C4 130.770 H1 C2 N9 122.637
C2 C4 H3 127.085 C2 C4 C6 105.422
C2 N9 N7 112.412 C2 N9 H8 128.815
H3 C4 C6 127.493 C4 C2 N9 106.593
C4 C6 H5 127.868 C4 C6 N7 112.472
H5 C6 N7 119.661 C6 N7 N9 103.101
N7 N9 H8 118.773
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.216      
2 C 0.137      
3 H 0.181      
4 C -0.341      
5 H 0.207      
6 C 0.070      
7 N -0.299      
8 H 0.344      
9 N -0.515      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  2.142 0.925 0.000 2.334
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -29.398 2.536 0.000
y 2.536 -21.613 0.000
z 0.000 0.000 -31.898
Traceless
 xyz
x -2.643 2.536 0.000
y 2.536 9.035 0.000
z 0.000 0.000 -6.392
Polar
3z2-r2-12.784
x2-y2-7.785
xy2.536
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.339 0.338 -0.000
y 0.338 6.700 -0.000
z -0.000 -0.000 1.803


<r2> (average value of r2) Å2
<r2> 81.423
(<r2>)1/2 9.023