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 C3H5 (Allyl radical)

using model chemistry: MP2/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2A2
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-116.910100
Energy at 298.15K-116.914468
HF Energy-116.482515
Nuclear repulsion energy65.364845
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 MP2/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3344 3158 6.53      
2 A1 3238 3058 0.02      
3 A1 3231 3052 9.40      
4 A1 1555 1469 3.00      
5 A1 1315 1242 1.02      
6 A1 1074 1014 0.03      
7 A1 431 407 0.14      
8 A2 836 789 0.00      
9 A2 603 569 0.00      
10 B1 1089 1028 14.89      
11 B1 861 813 71.14      
12 B1 571 539 12.20      
13 B2 3342 3156 1.48      
14 B2 3229 3050 3.81      
15 B2 1513 1429 0.33      
16 B2 1429 1350 8.21      
17 B2 1150 1086 0.95      
18 B2 949 896 0.20      

Unscaled Zero Point Vibrational Energy (zpe) 14878.4 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 14052.7 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 MP2/6-31G(2df,p)
ABC
1.83836 0.35137 0.29499

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.444
H2 0.000 0.000 1.529
C3 0.000 1.215 -0.196
C4 0.000 -1.215 -0.196
H5 0.000 2.145 0.353
H6 0.000 -2.145 0.353
H7 0.000 1.272 -1.276
H8 0.000 -1.272 -1.276

Atom - Atom Distances (Å)
  C1 H2 C3 C4 H5 H6 H7 H8
C11.08531.37321.37322.14692.14692.13912.1391
H21.08532.10992.10992.44642.44643.08003.0800
C31.37322.10992.43051.07943.40461.08172.7117
C41.37322.10992.43053.40461.07942.71171.0817
H52.14692.44641.07943.40464.28991.84793.7852
H62.14692.44643.40461.07944.28993.78521.8479
H72.13913.08001.08172.71171.84793.78522.5440
H82.13913.08002.71171.08173.78521.84792.5440

picture of Allyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 H5 121.708 C1 C3 H7 120.765
C1 C4 H6 121.708 C1 C4 H8 120.765
H2 C1 C3 117.758 H2 C1 C4 117.758
C3 C1 C4 124.485 H5 C3 H7 117.527
H6 C4 H8 117.527
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability