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

using model chemistry: B2PLYP=FULL/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B2PLYP=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-226.003971
Energy at 298.15K-226.009895
HF Energy-225.750477
Nuclear repulsion energy160.039875
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 B2PLYP=FULL/aug-cc-pVDZ
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' 3246 3122 8.66      
2 A' 3223 3100 6.51      
3 A' 3065 2948 2.42      
4 A' 1622 1560 41.62      
5 A' 1529 1470 9.82      
6 A' 1396 1343 20.83      
7 A' 1316 1266 25.98      
8 A' 1301 1251 5.06      
9 A' 1251 1204 5.07      
10 A' 1038 998 53.56      
11 A' 999 961 14.55      
12 A' 946 910 2.99      
13 A' 879 845 2.59      
14 A' 875 841 12.51      
15 A" 3107 2988 0.67      
16 A" 1153 1109 0.48      
17 A" 997 959 16.47      
18 A" 959 922 0.85      
19 A" 750 721 6.09      
20 A" 565 543 20.96      
21 A" 370 355 5.49      

Unscaled Zero Point Vibrational Energy (zpe) 15291.5 cm-1
Scaled (by 0.9618) Zero Point Vibrational Energy (zpe) 14707.4 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 B2PLYP=FULL/aug-cc-pVDZ
ABC
0.31761 0.29142 0.15643

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.202 0.363 0.000
C2 0.000 1.142 0.000
N3 1.123 0.502 0.000
C4 0.732 -0.906 0.000
C5 -0.768 -0.859 0.000
H6 -0.069 2.228 0.000
H7 1.142 -1.417 0.886
H8 1.142 -1.417 -0.886
H9 -1.445 -1.714 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.43182.32852.31311.29682.18133.07303.07302.0914
C21.43181.29192.17452.14301.08832.93802.93803.2003
N32.32851.29191.46132.32982.09722.11342.11343.3915
C42.31312.17451.46131.50113.23461.10121.10122.3219
C51.29682.14302.32981.50113.16482.17782.17781.0902
H62.18131.08832.09723.23463.16483.94103.94104.1747
H73.07302.93802.11341.10122.17783.94101.77112.7498
H83.07302.93802.11341.10122.17783.94101.77112.7498
H92.09143.20033.39152.32191.09024.17472.74982.7498

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 117.404 N1 C2 H6 119.273
N1 C5 C4 111.322 N1 C5 H9 122.128
C2 N1 C5 103.404 C2 N3 C4 104.166
N3 C2 H6 123.324 N3 C4 C5 103.704
N3 C4 H7 110.333 N3 C4 H8 110.333
C4 C5 H9 126.550 C5 C4 H7 112.719
C5 C4 H8 112.719 H7 C4 H8 107.060
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability