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All results from a given calculation for C3H4N2 (2H-Imidazole)

using model chemistry: CISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at CISD/3-21G*
 hartrees
Energy at 0K-223.866499
Energy at 298.15K-223.872620
HF Energy-223.436830
Nuclear repulsion energy165.669076
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 CISD/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 A1 3338 3119 6.67      
2 A1 3168 2960 0.00      
3 A1 1745 1630 27.74      
4 A1 1532 1432 7.51      
5 A1 1407 1315 2.43      
6 A1 1262 1179 4.36      
7 A1 1046 978 19.66      
8 A1 930 869 4.83      
9 A2 1223 1142 0.00      
10 A2 953 890 0.00      
11 A2 588 550 0.00      
12 B1 3215 3004 0.05      
13 B1 1075 1005 22.89      
14 B1 875 818 10.53      
15 B1 391 365 46.56      
16 B2 3321 3103 11.51      
17 B2 1793 1676 0.41      
18 B2 1392 1300 11.64      
19 B2 1316 1230 3.16      
20 B2 1093 1021 35.88      
21 B2 1006 940 80.59      

Unscaled Zero Point Vibrational Energy (zpe) 16334.0 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 15262.5 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 CISD/3-21G*
ABC
0.35818 0.29883 0.16820

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.222
N2 0.000 0.998 0.279
N3 0.000 -0.998 0.279
C4 0.000 0.741 -0.952
C5 0.000 -0.741 -0.952
H6 -0.898 0.000 1.837
H7 0.898 0.000 1.837
H8 0.000 1.468 -1.743
H9 0.000 -1.468 -1.743

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.37381.37382.29722.29721.08831.08833.30923.3092
N21.37381.99681.25742.13082.05702.05702.07593.1893
N31.37381.99682.13081.25742.05702.05703.18932.0759
C42.29721.25742.13081.48203.02223.02221.07452.3464
C52.29722.13081.25741.48203.02223.02222.34641.0745
H61.08832.05702.05703.02223.02221.79653.97233.9723
H71.08832.05702.05703.02223.02221.79653.97233.9723
H83.30922.07593.18931.07452.34643.97233.97232.9359
H93.30923.18932.07592.34641.07453.97233.97232.9359

picture of 2H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C4 121.571 C1 N3 C5 121.571
N2 C1 N3 93.231 N2 C1 H6 112.818
N2 C1 H7 112.818 N2 C4 C5 101.813
N2 C4 H8 125.613 N3 C1 H6 112.818
N3 C1 H7 112.818 N3 C5 C4 101.813
N3 C5 H9 125.613 C4 C5 H9 132.573
C5 C4 H8 132.573 H6 C1 H7 111.255
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability