return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C4H4N (pyrrolide radical)

using model chemistry: CCSD(T)=FULL/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2A2
Energy calculated at CCSD(T)=FULL/TZVP
 hartrees
Energy at 0K-209.101336
Energy at 298.15K 
HF Energy-208.258995
Nuclear repulsion energy150.627410
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(T)=FULL/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 3280 3136        
2 A1 3238 3096        
3 A1 1603 1533        
4 A1 1496 1430        
5 A1 1220 1167        
6 A1 1139 1089        
7 A1 1087 1039        
8 A1 882 843        
9 A2 755 722        
10 A2 557 533        
11 A2 219i 210i        
12 B1 704 673        
13 B1 641 613        
14 B1 527 504        
15 B2 3265 3121        
16 B2 3233 3090        
17 B2 1621 1550        
18 B2 1357 1297        
19 B2 1207 1154        
20 B2 1078 1031        
21 B2 833 796        

Unscaled Zero Point Vibrational Energy (zpe) 14752.1 cm-1
Scaled (by 0.956) Zero Point Vibrational Energy (zpe) 14103.0 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 CCSD(T)=FULL/TZVP
ABC
0.33224 0.29236 0.15551

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.251
C2 0.000 1.065 0.425
C3 0.000 -1.065 0.425
C4 0.000 0.681 -0.987
C5 0.000 -0.681 -0.987
H6 0.000 2.073 0.819
H7 0.000 -2.073 0.819
H8 0.000 1.355 -1.830
H9 0.000 -1.355 -1.830

Atom - Atom Distances (Å)
  N1 C2 C3 C4 C5 H6 H7 H8 H9
N11.34781.34782.33902.33902.11752.11753.36573.3657
C21.34782.13051.46322.24591.08223.16302.27383.3082
C31.34782.13052.24591.46323.16301.08223.30822.2738
C42.33901.46322.24591.36272.28013.29381.07942.2041
C52.33902.24591.46321.36273.29382.28012.20411.0794
H62.11751.08223.16302.28013.29384.14622.74504.3326
H72.11753.16301.08223.29382.28014.14624.33262.7450
H83.36572.27383.30821.07942.20412.74504.33262.7101
H93.36573.30822.27382.20411.07944.33262.74502.7101

picture of pyrrolide radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 C4 112.566 N1 C2 H6 120.861
N1 C3 C5 112.566 N1 C3 H7 120.861
C2 N1 C3 104.444 C2 C4 C5 105.212
C2 C4 H8 126.167 C3 C5 C4 105.212
C3 C5 H9 126.167 C4 C2 H6 126.573
C4 C5 H9 128.621 C5 C3 H7 126.573
C5 C4 H8 128.621
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability