return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
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All results from a given calculation for CH3CHN (methylmethaniminyl 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 CS 2A'
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-132.943847
Energy at 298.15K-132.947803
HF Energy-132.488314
Nuclear repulsion energy64.665775
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
4/u)
Dep P Dep U
1 A' 3246 3066 2.01      
2 A' 3121 2948 2.99      
3 A' 3084 2913 11.80      
4 A' 2154 2035 90.17      
5 A' 1505 1422 11.60      
6 A' 1409 1331 4.60      
7 A' 1275 1204 3.58      
8 A' 1083 1022 11.77      
9 A' 941 889 1.93      
10 A' 438 413 21.76      
11 A" 3213 3035 2.92      
12 A" 1511 1427 9.07      
13 A" 1149 1085 0.40      
14 A" 802 757 6.73      
15 A" 217 205 2.25      

Unscaled Zero Point Vibrational Energy (zpe) 12573.8 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 11876.0 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 MP2/6-31G(2df,p)
ABC
1.92974 0.35379 0.31658

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.482 0.000
C2 -0.818 -0.784 0.000
N3 1.221 0.522 0.000
H4 -0.557 1.428 0.000
H5 -0.168 -1.656 0.000
H6 -1.459 -0.804 0.882
H7 -1.459 -0.804 -0.882

Atom - Atom Distances (Å)
  C1 C2 N3 H4 H5 H6 H7
C11.50731.22191.09822.14462.13512.1351
C21.50732.42132.22831.08721.09061.0906
N31.22192.42131.99572.58323.11733.1173
H41.09822.22831.99573.10912.56402.5640
H52.14461.08722.58323.10911.78091.7809
H62.13511.09063.11732.56401.78091.7638
H72.13511.09063.11732.56401.78091.7638

picture of methylmethaniminyl radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H5 110.455 C1 C2 H6 109.497
C1 C2 H7 109.497 C2 C1 N3 124.721
C2 C1 H4 116.698 N3 C1 H4 118.581
H5 C2 H6 109.714 H5 C2 H7 109.714
H6 C2 H7 107.921
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability