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All results from a given calculation for CH3BH2 (methylborane)

using model chemistry: HF/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 HF/3-21G*
 hartrees
Energy at 0K-65.078091
Energy at 298.15K-65.082069
HF Energy-65.078091
Nuclear repulsion energy31.710186
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 HF/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' 3211 2899 15.85      
2 A' 3121 2817 5.63      
3 A' 2693 2431 109.94      
4 A' 1643 1483 4.82      
5 A' 1510 1363 61.55      
6 A' 1348 1217 61.22      
7 A' 1176 1062 116.81      
8 A' 993 897 14.39      
9 A' 713 643 1.10      
10 A" 3251 2934 21.08      
11 A" 2757 2489 180.62      
12 A" 1616 1459 6.47      
13 A" 1170 1056 29.86      
14 A" 748 675 1.07      
15 A" 94 85 1.56      

Unscaled Zero Point Vibrational Energy (zpe) 13022.1 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 11753.8 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 HF/3-21G*
ABC
3.23999 0.70373 0.64557

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.011 -0.692 0.000
B2 -0.011 0.884 0.000
H3 1.036 -1.015 0.000
H4 -0.466 -1.125 0.885
H5 -0.466 -1.125 -0.885
H6 0.010 1.499 -1.021
H7 0.010 1.499 1.021

Atom - Atom Distances (Å)
  C1 B2 H3 H4 H5 H6 H7
C11.57651.09601.08551.08552.41772.4177
B21.57652.16912.24252.24251.19201.1920
H31.09602.16911.74721.74722.90122.9012
H41.08552.24251.74721.77073.27852.6708
H51.08552.24251.74721.77072.67083.2785
H62.41771.19202.90123.27852.67082.0418
H72.41771.19202.90122.67083.27852.0418

picture of methylborane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 B2 H6 121.059 C1 B2 H7 121.059
B2 C1 H3 107.140 B2 C1 H4 113.507
B2 C1 H5 113.507 H3 C1 H4 106.439
H3 C1 H5 106.439 H4 C1 H5 109.295
H6 B2 H7 117.839
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.938      
2 B 0.420      
3 H 0.212      
4 H 0.208      
5 H 0.208      
6 H -0.056      
7 H -0.056      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.095 -0.476 0.000 0.486
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -13.745 -0.159 0.000
y -0.159 -16.817 0.000
z 0.000 0.000 -16.173
Traceless
 xyz
x 2.750 -0.159 0.000
y -0.159 -1.858 0.000
z 0.000 0.000 -0.891
Polar
3z2-r2-1.783
x2-y23.072
xy-0.159
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 2.512 -0.019 0.000
y -0.019 3.618 0.000
z 0.000 0.000 3.378


<r2> (average value of r2) Å2
<r2> 29.735
(<r2>)1/2 5.453