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All results from a given calculation for C3H4N2 (1H-Imidazole)

using model chemistry: MP4=FULL/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP4=FULL/3-21G
 hartrees
Energy at 0K-224.080466
Energy at 298.15K-224.086410
HF Energy-223.541863
Nuclear repulsion energy159.779776
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 MP4=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 A' 3569 3494        
2 A' 3276 3207        
3 A' 3252 3183        
4 A' 3250 3181        
5 A' 1506 1474        
6 A' 1443 1412        
7 A' 1383 1354        
8 A' 1304 1277        
9 A' 1242 1215        
10 A' 1148 1123        
11 A' 1065 1043        
12 A' 1057 1034        
13 A' 1009 988        
14 A' 941 921        
15 A' 897 878        
16 A" 838 820        
17 A" 812 795        
18 A" 727 712        
19 A" 668 653        
20 A" 640 627        
21 A" 589 577        

Unscaled Zero Point Vibrational Energy (zpe) 15307.1 cm-1
Scaled (by 0.9788) Zero Point Vibrational Energy (zpe) 14982.6 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 MP4=FULL/3-21G
ABC
0.31005 0.30133 0.15281

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4=FULL/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.130 0.000
C2 -1.119 0.290 0.000
C3 1.141 0.300 0.000
N4 -0.765 -1.008 0.000
C5 0.664 -1.000 0.000
H6 0.001 2.145 0.000
H7 -2.132 0.671 0.000
H8 2.145 0.703 0.000
H9 1.225 -1.923 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.39941.41162.27072.23101.01482.18062.18703.2899
C21.39942.26051.34522.20042.16701.08163.28993.2238
C31.41162.26052.31171.38462.16923.29391.08132.2245
N42.27071.34522.31171.42853.24452.16423.37532.1904
C52.23102.20041.38461.42853.21393.25622.25681.0806
H61.01482.16702.16923.24453.21392.59292.58384.2483
H72.18061.08163.29392.16423.25622.59294.27664.2418
H82.18703.28991.08133.37532.25682.58384.27662.7824
H93.28993.22382.22452.19041.08064.24834.24182.7824

picture of 1H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N4 111.636 N1 C2 H7 122.510
N1 C3 C5 105.851 N1 C3 H8 122.079
C2 N1 C3 107.061 C2 N1 H6 126.961
C2 N4 C5 104.946 C3 N1 H6 125.978
C3 C5 N4 110.506 C3 C5 H9 128.510
N4 C2 H7 125.854 N4 C5 H9 120.985
C5 C3 H8 132.070
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability