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

using model chemistry: QCISD/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/6-311G*
 hartrees
Energy at 0K-225.523650
Energy at 298.15K-225.529643
HF Energy-224.768998
Nuclear repulsion energy166.326663
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 QCISD/6-311G*
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 3246 3107 13.65      
2 A1 3093 2961 1.01      
3 A1 1738 1664 24.36      
4 A1 1465 1403 7.79      
5 A1 1415 1355 12.33      
6 A1 1269 1215 4.52      
7 A1 1043 999 1.57      
8 A1 938 898 16.24      
9 A2 1171 1121 0.00      
10 A2 882 845 0.00      
11 A2 536 513 0.00      
12 B1 3141 3008 0.34      
13 B1 1037 993 22.18      
14 B1 819 785 10.17      
15 B1 352 337 35.27      
16 B2 3231 3093 6.58      
17 B2 1792 1716 0.07      
18 B2 1429 1368 35.95      
19 B2 1255 1202 4.29      
20 B2 1095 1049 33.22      
21 B2 942 902 65.53      

Unscaled Zero Point Vibrational Energy (zpe) 15945.4 cm-1
Scaled (by 0.9574) Zero Point Vibrational Energy (zpe) 15266.1 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 QCISD/6-311G*
ABC
0.36040 0.30250 0.16986

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.207
N2 0.000 0.997 0.281
N3 0.000 -0.997 0.281
C4 0.000 0.732 -0.948
C5 0.000 -0.732 -0.948
H6 -0.899 0.000 1.833
H7 0.899 0.000 1.833
H8 0.000 1.484 -1.730
H9 0.000 -1.484 -1.730

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8 H9
C11.36121.36122.27672.27671.09501.09503.29123.2912
N21.36121.99461.25772.12162.05212.05212.06933.1939
N31.36121.99462.12161.25772.05212.05213.19392.0693
C42.27671.25772.12161.46373.01323.01321.08482.3495
C52.27672.12161.25771.46373.01323.01322.34951.0848
H61.09502.05212.05213.01323.01321.79753.96323.9632
H71.09502.05212.05213.01323.01321.79753.96323.9632
H83.29122.06933.19391.08482.34953.96323.96322.9674
H93.29123.19392.06932.34951.08483.96323.96322.9674

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 120.708 C1 N3 C5 120.708
N2 C1 N3 94.216 N2 C1 H6 112.881
N2 C1 H7 112.881 N2 C4 C5 102.184
N2 C4 H8 123.940 N3 C1 H6 112.881
N3 C1 H7 112.881 N3 C5 C4 102.184
N3 C5 H9 123.940 C4 C5 H9 133.875
C5 C4 H8 133.875 H6 C1 H7 110.322
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability