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All results from a given calculation for CH3BH2 (methylborane)

using model chemistry: QCISD/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 QCISD/3-21G*
 hartrees
Energy at 0K-65.249811
Energy at 298.15K-65.253700
HF Energy-65.077350
Nuclear repulsion energy31.382380
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 QCISD/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' 3044 2926 13.82      
2 A' 2953 2838 4.46      
3 A' 2570 2470 79.67      
4 A' 1551 1490 3.38      
5 A' 1416 1361 45.19      
6 A' 1274 1225 46.02      
7 A' 1111 1068 82.17      
8 A' 953 916 13.49      
9 A' 655 630 0.20      
10 A" 3087 2967 18.90      
11 A" 2642 2539 126.14      
12 A" 1524 1464 4.39      
13 A" 1105 1062 22.94      
14 A" 711 683 0.49      
15 A" 88 85 1.77      

Unscaled Zero Point Vibrational Energy (zpe) 12341.7 cm-1
Scaled (by 0.9611) Zero Point Vibrational Energy (zpe) 11861.6 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 QCISD/3-21G*
ABC
3.15175 0.69268 0.63483

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.013 -0.698 0.000
B2 -0.013 0.890 0.000
H3 1.052 -1.017 0.000
H4 -0.471 -1.136 0.899
H5 -0.471 -1.136 -0.899
H6 0.014 1.513 -1.034
H7 0.014 1.513 1.034

Atom - Atom Distances (Å)
  C1 B2 H3 H4 H5 H6 H7
C11.58751.11131.10031.10032.44102.4410
B21.58752.18372.26352.26351.20771.2077
H31.11132.18371.77241.77242.92392.9239
H41.10032.26351.77241.79783.31552.6972
H51.10032.26351.77241.79782.69723.3155
H62.44101.20772.92393.31552.69722.0678
H72.44101.20772.92392.69723.31552.0678

picture of methylborane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 B2 H6 121.091 C1 B2 H7 121.091
B2 C1 H3 106.696 B2 C1 H4 113.500
B2 C1 H5 113.500 H3 C1 H4 106.528
H3 C1 H5 106.528 H4 C1 H5 109.564
H6 B2 H7 117.756
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability