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All results from a given calculation for CH3BH2 (methylborane)

using model chemistry: CISD/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 CISD/3-21G
 hartrees
Energy at 0K-65.239371
Energy at 298.15K-65.243276
HF Energy-65.077643
Nuclear repulsion energy31.458616
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 CISD/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' 3086 2905 13.56      
2 A' 2997 2821 4.33      
3 A' 2603 2451 83.79      
4 A' 1568 1476 3.64      
5 A' 1434 1350 48.32      
6 A' 1289 1214 48.11      
7 A' 1125 1059 87.96      
8 A' 963 906 13.61      
9 A' 666 627 0.25      
10 A" 3128 2945 18.54      
11 A" 2674 2517 133.75      
12 A" 1541 1450 4.80      
13 A" 1118 1052 24.12      
14 A" 718 676 0.55      
15 A" 85 80 1.76      

Unscaled Zero Point Vibrational Energy (zpe) 12497.1 cm-1
Scaled (by 0.9413) Zero Point Vibrational Energy (zpe) 11763.6 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 CISD/3-21G
ABC
3.17058 0.69543 0.63748

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.012 -0.696 0.000
B2 -0.012 0.888 0.000
H3 1.048 -1.018 0.000
H4 -0.471 -1.133 0.896
H5 -0.471 -1.133 -0.896
H6 0.014 1.510 -1.031
H7 0.014 1.510 1.031

Atom - Atom Distances (Å)
  C1 B2 H3 H4 H5 H6 H7
C11.58461.10781.09701.09702.43562.4356
B21.58462.18092.25762.25761.20421.2042
H31.10782.18091.76711.76712.91902.9190
H41.09702.25761.76711.79223.30642.6903
H51.09702.25761.76711.79222.69033.3064
H62.43561.20422.91903.30642.69032.0617
H72.43561.20422.91902.69033.30642.0617

picture of methylborane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 B2 H6 121.096 C1 B2 H7 121.096
B2 C1 H3 106.853 B2 C1 H4 113.429
B2 C1 H5 113.429 H3 C1 H4 106.542
H3 C1 H5 106.542 H4 C1 H5 109.539
H6 B2 H7 117.745
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability