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

using model chemistry: QCISD(T)/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 QCISD(T)/aug-cc-pVDZ
 hartrees
Energy at 0K-225.656543
Energy at 298.15K-225.662426
HF Energy-224.843517
Nuclear repulsion energy161.371814
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(T)/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' 3656 3575        
2 A' 3280 3207        
3 A' 3257 3184        
4 A' 3252 3180        
5 A' 1538 1504        
6 A' 1490 1457        
7 A' 1439 1407        
8 A' 1348 1318        
9 A' 1259 1231        
10 A' 1137 1112        
11 A' 1131 1106        
12 A' 1084 1060        
13 A' 1059 1035        
14 A' 923 902        
15 A' 886 866        
16 A" 829 811        
17 A" 798 781        
18 A" 706 690        
19 A" 660 645        
20 A" 622 608        
21 A" 489 478        

Unscaled Zero Point Vibrational Energy (zpe) 15421.2 cm-1
Scaled (by 0.9778) Zero Point Vibrational Energy (zpe) 15078.9 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(T)/aug-cc-pVDZ
ABC
0.31858 0.30591 0.15606

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.116 0.000
C2 -1.100 0.286 0.000
C3 1.132 0.306 0.000
N4 -0.753 -0.999 0.000
C5 0.643 -0.994 0.000
H6 -0.014 2.129 0.000
H7 -2.120 0.671 0.000
H8 2.142 0.714 0.000
H9 1.214 -1.924 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.37791.39232.24472.20601.01292.16662.17913.2729
C21.37792.23231.33112.16312.13891.09043.27013.1995
C31.39232.23232.29221.38862.15343.27291.08932.2306
N42.24471.33112.29221.39623.21372.15833.36362.1732
C52.20602.16311.38861.39623.19133.22662.27261.0905
H61.01292.13892.15343.21373.19132.56182.57824.2341
H72.16661.09043.27292.15833.22662.56184.26244.2247
H82.17913.27011.08933.36362.27262.57824.26242.7964
H93.27293.19952.23062.17321.09054.23414.22472.7964

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 111.903 N1 C2 H7 122.314
N1 C3 C5 104.986 N1 C3 H8 122.361
C2 N1 C3 107.379 C2 N1 H6 126.247
C2 N4 C5 104.935 C3 N1 H6 126.374
C3 C5 N4 110.796 C3 C5 H9 127.844
N4 C2 H7 125.783 N4 C5 H9 121.359
C5 C3 H8 132.653
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability