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All results from a given calculation for C3H4N2 (4H-Imidazole)

using model chemistry: MP2=FULL/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 MP2=FULL/6-31G
 hartrees
Energy at 0K-225.167178
Energy at 298.15K-225.173041
HF Energy-224.663406
Nuclear repulsion energy156.832038
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 MP2=FULL/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3304 3139 6.34      
2 A' 3267 3104 5.09      
3 A' 3098 2943 0.10      
4 A' 1530 1454 11.03      
5 A' 1508 1433 18.38      
6 A' 1442 1370 2.94      
7 A' 1311 1246 15.00      
8 A' 1304 1239 0.88      
9 A' 1276 1212 12.80      
10 A' 983 934 31.10      
11 A' 943 896 11.12      
12 A' 924 878 0.27      
13 A' 836 794 9.12      
14 A' 819 779 11.90      
15 A" 3154 2996 0.99      
16 A" 1161 1103 0.09      
17 A" 1028 977 17.57      
18 A" 920 874 0.47      
19 A" 773 734 15.11      
20 A" 560 532 21.19      
21 A" 383 364 9.72      

Unscaled Zero Point Vibrational Energy (zpe) 15262.0 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 14500.4 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 MP2=FULL/6-31G
ABC
0.30245 0.28093 0.14979

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.162 0.542 0.000
C2 0.777 -0.887 0.000
N3 -0.512 -1.146 0.000
C4 -1.178 0.213 0.000
C5 0.000 1.175 0.000
H6 1.549 -1.645 0.000
H7 -1.813 0.303 0.892
H8 -1.813 0.303 -0.892
H9 -0.064 2.258 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.47992.37752.36301.32282.22183.11533.11532.1085
C21.47991.31492.24332.20301.08232.98672.98673.2551
N32.37751.31491.51362.37652.12052.14182.14183.4333
C42.36302.24331.51361.52073.30011.09861.09862.3286
C51.32282.20302.37651.52073.21752.20102.20101.0851
H62.22181.08232.12053.30013.21753.98683.98684.2234
H73.11532.98672.14181.09862.20103.98681.78362.7712
H83.11532.98672.14181.09862.20103.98681.78362.7712
H92.10853.25513.43332.32861.08514.22342.77122.7712

picture of 4H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N3 116.443 N1 C2 H6 119.443
N1 C5 C4 112.220 N1 C5 H9 121.937
C2 N1 C5 103.488 C2 N3 C4 104.737
N3 C2 H6 124.114 N3 C4 C5 103.111
N3 C4 H7 109.120 N3 C4 H8 109.120
C4 C5 H9 125.843 C5 C4 H7 113.365
C5 C4 H8 113.365 H7 C4 H8 108.536
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability