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

using model chemistry: HF/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at HF/cc-pVDZ
 hartrees
Energy at 0K-224.836355
Energy at 298.15K-224.842559
HF Energy-224.836355
Nuclear repulsion energy164.654822
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/cc-pVDZ
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' 3906 3547 100.45      
2 A' 3447 3130 2.48      
3 A' 3415 3101 0.82      
4 A' 3413 3099 9.05      
5 A' 1730 1571 24.00      
6 A' 1652 1500 23.95      
7 A' 1579 1433 19.40      
8 A' 1490 1353 8.41      
9 A' 1387 1260 0.53      
10 A' 1243 1128 6.72      
11 A' 1226 1113 3.45      
12 A' 1172 1064 13.54      
13 A' 1146 1040 58.26      
14 A' 1016 923 2.08      
15 A' 981 890 7.67      
16 A" 991 900 0.01      
17 A" 962 874 18.39      
18 A" 830 754 46.93      
19 A" 731 663 12.64      
20 A" 692 628 5.00      
21 A" 524 476 116.70      

Unscaled Zero Point Vibrational Energy (zpe) 16765.7 cm-1
Scaled (by 0.908) Zero Point Vibrational Energy (zpe) 15223.3 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 HF/cc-pVDZ
ABC
0.33025 0.32008 0.16254

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.096 0.000
C2 -1.075 0.279 0.000
C3 1.111 0.291 0.000
N4 -0.742 -0.968 0.000
C5 0.630 -0.976 0.000
H6 -0.015 2.092 0.000
H7 -2.085 0.659 0.000
H8 2.112 0.685 0.000
H9 1.188 -1.897 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.35051.37242.19422.16620.99592.13022.15133.2209
C21.35052.18641.29152.11782.10031.07823.21273.1404
C31.37242.18642.24061.35502.12433.21681.07552.1893
N42.19421.29152.24061.37253.14602.10933.29832.1424
C52.16622.11781.35501.37253.13543.16902.22581.0771
H60.99592.10032.12433.14603.13542.51802.54974.1669
H72.13021.07823.21682.10933.16902.51804.19644.1527
H82.15133.21271.07553.29832.22582.54974.19642.7424
H93.22093.14042.18932.14241.07714.16694.15272.7424

picture of 1H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N4 112.283 N1 C2 H7 122.182
N1 C3 C5 105.164 N1 C3 H8 122.541
C2 N1 C3 106.823 C2 N1 H6 126.386
C2 N4 C5 105.266 C3 N1 H6 126.791
C3 C5 N4 110.463 C3 C5 H9 127.999
N4 C2 H7 125.535 N4 C5 H9 121.538
C5 C3 H8 132.294
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/cc-pVDZ Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.227      
2 C 0.251      
3 C 0.042      
4 N -0.344      
5 C 0.045      
6 H 0.119      
7 H 0.047      
8 H 0.042      
9 H 0.025      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  1.035 3.638 0.000 3.782
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -26.307 -3.368 0.000
y -3.368 -25.482 0.000
z 0.000 0.000 -31.826
Traceless
 xyz
x 2.347 -3.368 0.000
y -3.368 3.584 0.000
z 0.000 0.000 -5.931
Polar
3z2-r2-11.862
x2-y2-0.825
xy-3.368
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.757 -0.158 0.000
y -0.158 6.624 0.000
z 0.000 0.000 2.909


<r2> (average value of r2) Å2
<r2> 78.761
(<r2>)1/2 8.875