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All results from a given calculation for CH3BH2 (methylborane)

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-65.221349
Energy at 298.15K-65.225260
HF Energy-65.077761
Nuclear repulsion energy31.504194
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 MP2/3-21G*
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' 3114 2962 11.08      
2 A' 3019 2872 2.88      
3 A' 2631 2502 87.38      
4 A' 1575 1498 3.57      
5 A' 1432 1362 49.73      
6 A' 1302 1239 49.66      
7 A' 1135 1080 91.97      
8 A' 969 922 14.26      
9 A' 664 632 0.13      
10 A" 3160 3006 15.06      
11 A" 2705 2574 139.22      
12 A" 1545 1470 4.68      
13 A" 1123 1068 24.83      
14 A" 723 688 0.45      
15 A" 88 84 1.97      

Unscaled Zero Point Vibrational Energy (zpe) 12592.2 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 11979.0 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 MP2/3-21G*
ABC
3.17926 0.69747 0.63936

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.013 -0.696 0.000
B2 -0.013 0.887 0.000
H3 1.048 -1.012 0.000
H4 -0.469 -1.132 0.896
H5 -0.469 -1.132 -0.896
H6 0.014 1.507 -1.029
H7 0.014 1.507 1.029

Atom - Atom Distances (Å)
  C1 B2 H3 H4 H5 H6 H7
C11.58271.10671.09561.09562.43162.4316
B21.58272.17492.25532.25531.20161.2016
H31.10672.17491.76541.76542.91102.9110
H41.09562.25531.76541.79123.30182.6864
H51.09562.25531.76541.79122.68643.3018
H62.43161.20162.91103.30182.68642.0573
H72.43161.20162.91102.68643.30182.0573

picture of methylborane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 B2 H6 121.087 C1 B2 H7 121.087
B2 C1 H3 106.593 B2 C1 H4 113.465
B2 C1 H5 113.465 H3 C1 H4 106.569
H3 C1 H5 106.569 H4 C1 H5 109.661
H6 B2 H7 117.762
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability