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

using model chemistry: QCISD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at QCISD/6-31G*
 hartrees
Energy at 0K-225.525130
Energy at 298.15K 
HF Energy-224.790495
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 QCISD/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 3696 3519 82.77      
2 A' 3305 3147 0.80      
3 A' 3286 3130 3.25      
4 A' 3274 3118 4.74      
5 A' 1615 1538 7.52      
6 A' 1531 1458 10.80      
7 A' 1469 1399 19.61      
8 A' 1424 1356 4.05      
9 A' 1314 1251 2.54      
10 A' 1206 1148 0.70      
11 A' 1171 1115 19.85      
12 A' 1085 1033 5.62      
13 A' 1073 1022 35.17      
14 A' 949 904 5.36      
15 A' 930 886 9.11      
16 A" 868 827 13.92      
17 A" 817 778 2.55      
18 A" 755 719 88.99      
19 A" 692 659 22.89      
20 A" 627 597 0.23      
21 A" 485 462 68.21      

Unscaled Zero Point Vibrational Energy (zpe) 15785.3 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 15032.3 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 QCISD/6-31G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.108 0.734 0.000
C2 1.113 0.307 0.000
H3 1.270 -1.898 0.000
C4 0.668 -0.999 0.000
H5 -1.480 -1.688 0.000
C6 -0.744 -0.892 0.000
N7 -1.152 0.377 0.000
H8 -0.052 2.096 0.000
N9 0.000 1.087 0.000

Atom - Atom Distances (Å)
  H1 C2 H3 C4 H5 C6 N7 H8 N9
H11.08282.76172.25294.32843.28273.27972.55352.1373
C21.08282.21051.37963.27122.21022.26622.13471.3590
H32.76172.21051.08202.75812.25153.32344.20703.2442
C42.25291.37961.08202.25561.41612.28203.17762.1905
H54.32843.27122.75812.25561.08392.09084.04433.1450
C63.28272.21022.25151.41611.08391.33313.06702.1144
N73.27972.26623.32342.28202.09081.33312.04101.3537
H82.55352.13474.20703.17764.04433.06702.04101.0101
N92.13731.35903.24422.19053.14502.11441.35371.0101

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 132.014 H1 C2 N9 121.753
C2 C4 H3 127.371 C2 C4 C6 104.471
C2 N9 N7 113.319 C2 N9 H8 127.987
H3 C4 C6 128.157 C4 C2 N9 106.233
C4 C6 H5 128.416 C4 C6 N7 112.171
H5 C6 N7 119.413 C6 N7 N9 103.805
N7 N9 H8 118.694
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability