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

using model chemistry: QCISD(T)/6-311G*

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)/6-311G*
 hartrees
Energy at 0K-225.653191
Energy at 298.15K-225.659028
HF Energy-224.856194
Nuclear repulsion energy162.366916
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)/6-311G*
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' 3679 3542        
2 A' 3261 3140        
3 A' 3237 3117        
4 A' 3232 3112        
5 A' 1559 1501        
6 A' 1512 1456        
7 A' 1462 1407        
8 A' 1363 1312        
9 A' 1277 1229        
10 A' 1156 1113        
11 A' 1154 1111        
12 A' 1100 1059        
13 A' 1078 1038        
14 A' 936 902        
15 A' 901 868        
16 A" 802 772        
17 A" 790 760        
18 A" 680 655        
19 A" 665 640        
20 A" 625 602        
21 A" 456 439        

Unscaled Zero Point Vibrational Energy (zpe) 15462.4 cm-1
Scaled (by 0.9628) Zero Point Vibrational Energy (zpe) 14887.2 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)/6-311G*
ABC
0.32318 0.30911 0.15799

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-311G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.111 0.000
C2 -1.092 0.282 0.000
C3 1.125 0.304 0.000
N4 -0.749 -0.993 0.000
C5 0.638 -0.986 0.000
H6 -0.010 2.119 0.000
H7 -2.108 0.663 0.000
H8 2.129 0.710 0.000
H9 1.203 -1.912 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.37061.38472.23362.19211.00812.15512.16683.2536
C21.37062.21731.32112.14562.13141.08503.24953.1754
C31.38472.21732.27961.37892.14093.25321.08302.2176
N42.23361.32112.27961.38753.19892.14243.34472.1574
C52.19212.14561.37891.38753.17213.20352.25821.0846
H61.00812.13142.14093.19893.17212.55372.56194.2098
H72.15511.08503.25322.14243.20352.55374.23774.1944
H82.16683.24951.08303.34472.25822.56194.23772.7810
H93.25363.17542.21762.15741.08464.20984.19442.7810

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 112.147 N1 C2 H7 122.287
N1 C3 C5 104.969 N1 C3 H8 122.345
C2 N1 C3 107.169 C2 N1 H6 126.609
C2 N4 C5 104.741 C3 N1 H6 126.222
C3 C5 N4 110.975 C3 C5 H9 127.962
N4 C2 H7 125.567 N4 C5 H9 121.063
C5 C3 H8 132.686
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability