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

using model chemistry: MP2=FULL/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 MP2=FULL/3-21G*
 hartrees
Energy at 0K-223.914437
Energy at 298.15K-223.920450
HF Energy-223.434158
Nuclear repulsion energy164.766510
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/3-21G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3290 3119 8.10      
2 A1 3129 2966 0.48      
3 A1 1634 1549 28.74      
4 A1 1508 1429 7.57      
5 A1 1360 1290 0.22      
6 A1 1240 1176 5.87      
7 A1 1023 970 17.01      
8 A1 879 833 5.29      
9 A2 1193 1131 0.00      
10 A2 883 837 0.00      
11 A2 571 542 0.00      
12 B1 3181 3016 0.05      
13 B1 1048 994 18.37      
14 B1 833 790 12.98      
15 B1 369 349 44.17      
16 B2 3274 3103 10.52      
17 B2 1668 1581 0.59      
18 B2 1338 1269 7.87      
19 B2 1284 1217 3.16      
20 B2 1066 1010 26.65      
21 B2 978 927 84.57      

Unscaled Zero Point Vibrational Energy (zpe) 15873.5 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 15048.1 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/3-21G*
ABC
0.35671 0.29402 0.16639

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.230
N2 0.000 0.999 0.284
N3 0.000 -0.999 0.284
C4 0.000 0.744 -0.963
C5 0.000 -0.744 -0.963
H6 -0.902 0.000 1.845
H7 0.902 0.000 1.845
H8 0.000 1.481 -1.750
H9 0.000 -1.481 -1.750

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.37531.37532.31542.31541.09181.09183.32773.3277
N21.37531.99711.27272.14252.06072.06072.09093.2070
N31.37531.99712.14251.27272.06072.06073.20702.0909
C42.31541.27272.14251.48753.04143.04141.07852.3596
C52.31542.14251.27271.48753.04143.04142.35961.0785
H61.09182.06072.06073.04143.04141.80423.99143.9914
H71.09182.06072.06073.04143.04141.80423.99143.9914
H83.32772.09093.20701.07852.35963.99143.99142.9611
H93.32773.20702.09092.35961.07853.99143.99142.9611

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 121.896 C1 N3 C5 121.896
N2 C1 N3 93.113 N2 C1 H6 112.790
N2 C1 H7 112.790 N2 C4 C5 101.547
N2 C4 H8 125.362 N3 C1 H6 112.790
N3 C1 H7 112.790 N3 C5 C4 101.547
N3 C5 H9 125.362 C4 C5 H9 133.091
C5 C4 H8 133.091 H6 C1 H7 111.429
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability