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All results from a given calculation for C3H4N2 (1H-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-225.198090
Energy at 298.15K-225.203978
HF Energy-224.702605
Nuclear repulsion energy160.217262
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
(Å4/u)
Dep P Dep U
1 A' 3677 3494 63.14      
2 A' 3323 3158 1.61      
3 A' 3309 3144 2.92      
4 A' 3297 3133 1.27      
5 A' 1537 1461 20.50      
6 A' 1473 1400 9.28      
7 A' 1431 1360 19.52      
8 A' 1342 1275 10.33      
9 A' 1266 1203 6.05      
10 A' 1174 1115 0.65      
11 A' 1115 1060 14.45      
12 A' 1107 1052 15.33      
13 A' 1057 1004 22.67      
14 A' 945 898 3.60      
15 A' 910 865 7.06      
16 A" 793 753 29.88      
17 A" 739 702 47.16      
18 A" 672 638 5.92      
19 A" 658 625 8.14      
20 A" 631 600 81.75      
21 A" 577 548 89.04      

Unscaled Zero Point Vibrational Energy (zpe) 15516.6 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 14742.3 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 MP2=FULL/6-31G
ABC
0.31202 0.30289 0.15369

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 0.000 1.123 0.000
C2 -1.118 0.294 0.000
C3 1.139 0.305 0.000
N4 -0.757 -1.007 0.000
C5 0.658 -0.999 0.000
H6 -0.005 2.134 0.000
H7 -2.133 0.667 0.000
H8 2.142 0.710 0.000
H9 1.217 -1.925 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.39161.40202.26042.22221.01082.18082.18163.2816
C21.39162.25641.35012.19672.15031.08133.28623.2205
C31.40202.25642.30531.39052.15673.29131.08202.2312
N42.26041.35012.30531.41453.22952.16683.36912.1764
C52.22222.19671.39051.41453.20263.25012.26401.0809
H61.01082.15032.15673.22953.20262.58462.57604.2383
H72.18081.08133.29132.16683.25012.58464.27494.2349
H82.18163.28621.08203.36912.26402.57604.27492.7925
H93.28163.22052.23122.17641.08094.23834.23492.7925

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 111.058 N1 C2 H7 123.257
N1 C3 C5 105.452 N1 C3 H8 122.342
C2 N1 C3 107.746 C2 N1 H6 126.302
C2 N4 C5 105.209 C3 N1 H6 125.952
C3 C5 N4 110.535 C3 C5 H9 128.626
N4 C2 H7 125.685 N4 C5 H9 120.839
C5 C3 H8 132.207
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability