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

using model chemistry: CCSD/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 CCSD/6-31G*
 hartrees
Energy at 0K-225.522864
Energy at 298.15K-225.528807
HF Energy-224.794652
Nuclear repulsion energy160.137581
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 CCSD/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' 3259 3078 13.41      
2 A' 3236 3056 8.50      
3 A' 3085 2913 2.48      
4 A' 1698 1604 33.66      
5 A' 1616 1526 10.24      
6 A' 1479 1396 13.07      
7 A' 1356 1281 22.68      
8 A' 1346 1271 7.97      
9 A' 1308 1235 3.87      
10 A' 1053 994 57.33      
11 A' 1022 965 7.47      
12 A' 973 918 2.00      
13 A' 892 842 6.53      
14 A' 885 835 10.37      
15 A" 3128 2954 3.01      
16 A" 1190 1124 0.25      
17 A" 1030 972 13.60      
18 A" 959 906 0.02      
19 A" 777 734 6.48      
20 A" 564 533 24.27      
21 A" 373 352 6.19      

Unscaled Zero Point Vibrational Energy (zpe) 15614.2 cm-1
Scaled (by 0.9443) Zero Point Vibrational Energy (zpe) 14744.5 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 CCSD/6-31G*
ABC
0.31881 0.29069 0.15651

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.207 0.356 0.000
C2 0.000 1.139 0.000
N3 1.120 0.508 0.000
C4 0.736 -0.905 0.000
C5 -0.766 -0.857 0.000
H6 -0.074 2.223 0.000
H7 1.147 -1.410 0.885
H8 1.147 -1.410 -0.885
H9 -1.434 -1.716 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.43842.33222.31671.29092.18353.07303.07302.0847
C21.43841.28592.17222.13781.08672.93172.93173.1947
N32.33221.28591.46372.32822.09032.11222.11223.3866
C42.31672.17221.46371.50323.23111.09881.09882.3171
C51.29092.13782.32821.50323.15672.17912.17911.0882
H62.18351.08672.09033.23113.15673.93343.93344.1671
H73.07302.93172.11221.09882.17913.93341.77082.7456
H83.07302.93172.11221.09882.17913.93341.77082.7456
H92.08473.19473.38662.31711.08824.16712.74562.7456

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 117.647 N1 C2 H6 119.046
N1 C5 C4 111.793 N1 C5 H9 122.162
C2 N1 C5 102.987 C2 N3 C4 104.189
N3 C2 H6 123.307 N3 C4 C5 103.385
N3 C4 H7 110.217 N3 C4 H8 110.217
C4 C5 H9 126.046 C5 C4 H7 112.824
C5 C4 H8 112.824 H7 C4 H8 107.368
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability