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All results from a given calculation for CH3BH2 (methylborane)

using model chemistry: QCISD/6-31G(2df,p)

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/6-31G(2df,p)
 hartrees
Energy at 0K-65.753305
Energy at 298.15K-65.757256
HF Energy-65.451880
Nuclear repulsion energy31.752546
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/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' 3133 2968 10.87      
2 A' 3034 2874 2.86      
3 A' 2632 2493 90.14      
4 A' 1510 1430 1.37      
5 A' 1360 1289 55.37      
6 A' 1281 1214 23.37      
7 A' 1106 1048 67.23      
8 A' 978 926 12.20      
9 A' 566 536 0.78      
10 A" 3183 3016 13.39      
11 A" 2706 2564 126.00      
12 A" 1473 1395 2.89      
13 A" 1083 1026 19.07      
14 A" 689 653 0.78      
15 A" 160 152 1.08      

Unscaled Zero Point Vibrational Energy (zpe) 12446.5 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 11791.9 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/6-31G(2df,p)
ABC
3.21183 0.71259 0.65174

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.017 -0.687 0.000
B2 -0.017 0.877 0.000
H3 1.052 -0.958 0.000
H4 -0.445 -1.144 0.894
H5 -0.445 -1.144 -0.894
H6 0.014 1.491 -1.025
H7 0.014 1.491 1.025

Atom - Atom Distances (Å)
  C1 B2 H3 H4 H5 H6 H7
C11.56461.10321.09141.09142.40712.4071
B21.56462.12392.25142.25141.19461.1946
H31.10322.12391.75361.75362.84972.8497
H41.09142.25141.75361.78883.29182.6777
H51.09142.25141.75361.78882.67773.2918
H62.40711.19462.84973.29182.67772.0493
H72.40711.19462.84972.67773.29182.0493

picture of methylborane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 B2 H6 120.890 C1 B2 H7 120.890
B2 C1 H3 104.186 B2 C1 H4 114.749
B2 C1 H5 114.749 H3 C1 H4 106.074
H3 C1 H5 106.074 H4 C1 H5 110.065
H6 B2 H7 118.127
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability