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

using model chemistry: ROMP2/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at ROMP2/TZVP
 hartrees
Energy at 0K-225.646054
Energy at 298.15K-225.651584
HF Energy-224.884272
Nuclear repulsion energy163.223810
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 ROMP2/TZVP
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' 3684 3684        
2 A' 3331 3331        
3 A' 3307 3307        
4 A' 3303 3303        
5 A' 1548 1548        
6 A' 1513 1513        
7 A' 1466 1466        
8 A' 1377 1377        
9 A' 1293 1293        
10 A' 1183 1183        
11 A' 1162 1162        
12 A' 1113 1113        
13 A' 1092 1092        
14 A' 942 942        
15 A' 906 906        
16 A" 748 748        
17 A" 702 702        
18 A" 663 663        
19 A" 634 634        
20 A" 548 548        
21 A" 262 262        

Unscaled Zero Point Vibrational Energy (zpe) 15388.0 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 15388.0 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 ROMP2/TZVP
ABC
0.32660 0.31249 0.15970

See section I.F.4 to change rotational constant units
Geometric Data calculated at ROMP2/TZVP

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.103 0.000
C2 -1.089 0.283 0.000
C3 1.117 0.305 0.000
N4 -0.740 -0.991 0.000
C5 0.635 -0.982 0.000
H6 -0.012 2.111 0.000
H7 -2.098 0.662 0.000
H8 2.114 0.709 0.000
H9 1.199 -1.899 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.36391.37332.22102.18021.00772.14362.15033.2333
C21.36392.20641.32032.13832.12201.07723.23143.1619
C31.37332.20642.26411.37422.13063.23451.07572.2054
N42.22101.32032.26411.37483.18592.13853.32162.1415
C52.18022.13831.37421.37483.16033.18882.24671.0768
H61.00772.12202.13063.18593.16032.53942.54704.1894
H72.14361.07723.23452.13853.18882.53944.21174.1746
H82.15033.23141.07573.32162.24672.54704.21172.7640
H93.23333.16192.20542.14151.07684.18944.17462.7640

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 111.660 N1 C2 H7 122.394
N1 C3 C5 105.027 N1 C3 H8 122.345
C2 N1 C3 107.428 C2 N1 H6 126.293
C2 N4 C5 104.991 C3 N1 H6 126.280
C3 C5 N4 110.894 C3 C5 H9 127.847
N4 C2 H7 125.946 N4 C5 H9 121.259
C5 C3 H8 132.627
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at ROMP2/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.157      
2 C -0.043      
3 C -0.154      
4 N -0.164      
5 C -0.090      
6 H 0.250      
7 H 0.119      
8 H 0.126      
9 H 0.114      


Electric dipole moments


Electric Quadrupole moment
Quadrupole components in D Å


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 80.093
(<r2>)1/2 8.949