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All results from a given calculation for C3H3N2 (imidazolyl radical)

using model chemistry: CCSD/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2B1
Energy calculated at CCSD/TZVP
 hartrees
Energy at 0K-225.007333
Energy at 298.15K-225.011686
HF Energy-224.267563
Nuclear repulsion energy153.147898
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 CCSD/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 A1 3292 3142 1.75      
2 A1 3278 3129 9.81      
3 A1 1484 1416 16.19      
4 A1 1340 1279 51.81      
5 A1 1166 1113 28.06      
6 A1 1006 960 1.99      
7 A1 932 889 2.14      
8 A2 759 724 0.00      
9 A2 546 521 0.00      
10 B1 779 743 0.00      
11 B1 747 713 26.56      
12 B1 510 486 27.79      
13 B2 3266 3117 0.58      
14 B2 1560 1489 19.11      
15 B2 1324 1264 0.10      
16 B2 1211 1156 8.65      
17 B2 1015 968 53.03      
18 B2 769 734 1.46      

Unscaled Zero Point Vibrational Energy (zpe) 12490.4 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 11920.8 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 CCSD/TZVP
ABC
0.35640 0.30618 0.16469

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.097
N2 0.000 1.166 0.369
N3 0.000 -1.166 0.369
C4 0.000 0.737 -0.873
C5 0.000 -0.737 -0.873
H6 0.000 0.000 2.175
H7 0.000 1.402 -1.725
H8 0.000 -1.402 -1.725

Atom - Atom Distances (Å)
  C1 N2 N3 C4 C5 H6 H7 H8
C11.37391.37392.10352.10351.07873.15053.1505
N21.37392.33121.31442.27282.14952.10753.3131
N31.37392.33122.27281.31442.14953.31312.1075
C42.10351.31442.27281.47473.13661.08002.3022
C52.10352.27281.31441.47473.13662.30221.0800
H61.07872.14952.14953.13663.13664.14444.1444
H73.15052.10753.31311.08002.30224.14442.8032
H83.15053.31312.10752.30221.08004.14442.8032

picture of imidazolyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C4 102.947 C1 N3 C5 102.947
N2 C1 N3 116.076 N2 C1 H6 121.962
N2 C4 C5 109.015 N2 C4 H7 123.030
N3 C1 H6 121.962 N3 C5 C4 109.015
N3 C5 H8 123.030 C4 C5 H8 127.955
C5 C4 H7 127.955
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability