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

using model chemistry: CCD/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 CCD/cc-pVDZ
 hartrees
Energy at 0K-225.553145
Energy at 298.15K-225.559097
HF Energy-224.813577
Nuclear repulsion energy159.732392
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 CCD/cc-pVDZ
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' 3255 3114 12.42      
2 A' 3233 3093 8.04      
3 A' 3088 2954 3.51      
4 A' 1704 1631 27.55      
5 A' 1629 1559 7.65      
6 A' 1422 1361 13.21      
7 A' 1343 1284 20.02      
8 A' 1330 1272 7.90      
9 A' 1280 1224 3.57      
10 A' 1053 1008 48.63      
11 A' 1024 980 9.27      
12 A' 962 920 1.76      
13 A' 890 851 8.33      
14 A' 882 844 9.59      
15 A" 3137 3002 2.99      
16 A" 1172 1122 0.50      
17 A" 1013 970 16.19      
18 A" 967 925 0.45      
19 A" 769 736 5.63      
20 A" 564 539 18.89      
21 A" 368 352 5.55      

Unscaled Zero Point Vibrational Energy (zpe) 15542.4 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 14869.4 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 CCD/cc-pVDZ
ABC
0.31804 0.28854 0.15576

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.211 0.355 0.000
C2 0.000 1.139 0.000
N3 1.123 0.510 0.000
C4 0.740 -0.903 0.000
C5 -0.769 -0.859 0.000
H6 -0.076 2.231 0.000
H7 1.152 -1.413 0.891
H8 1.152 -1.413 -0.891
H9 -1.440 -1.725 0.000

Atom - Atom Distances (Å)
  N1 C2 N3 C4 C5 H6 H7 H8 H9
N11.44322.33962.32211.29162.19323.08303.08302.0923
C21.44321.28712.17272.14071.09442.93872.93873.2060
N32.33961.28711.46462.33522.09712.12012.12013.4010
C42.32212.17271.46461.50983.23901.10591.10592.3302
C51.29162.14072.33521.50983.16652.18872.18871.0961
H62.19321.09442.09713.23903.16653.94743.94744.1848
H73.08302.93872.12011.10592.18873.94741.78172.7586
H83.08302.93872.12011.10592.18873.94741.78172.7586
H92.09233.20603.40102.33021.09614.18482.75862.7586

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 117.822 N1 C2 H6 118.962
N1 C5 C4 111.739 N1 C5 H9 122.185
C2 N1 C5 102.889 C2 N3 C4 104.104
N3 C2 H6 123.217 N3 C4 C5 103.446
N3 C4 H7 110.354 N3 C4 H8 110.354
C4 C5 H9 126.076 C5 C4 H7 112.685
C5 C4 H8 112.685 H7 C4 H8 107.328
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability