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All results from a given calculation for CH3BH2 (methylborane)

using model chemistry: QCISD/6-31G**

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**
 hartrees
Energy at 0K-65.718860
Energy at 298.15K-65.722803
HF Energy-65.448659
Nuclear repulsion energy31.785677
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**
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' 3158 2973 17.26      
2 A' 3061 2881 3.70      
3 A' 2656 2501 100.84      
4 A' 1538 1448 1.24      
5 A' 1394 1312 56.03      
6 A' 1308 1231 32.06      
7 A' 1127 1061 76.57      
8 A' 988 930 10.61      
9 A' 595 560 0.59      
10 A" 3207 3019 21.43      
11 A" 2730 2570 153.46      
12 A" 1501 1413 2.56      
13 A" 1103 1039 19.52      
14 A" 706 664 1.47      
15 A" 135 127 1.07      

Unscaled Zero Point Vibrational Energy (zpe) 12602.3 cm-1
Scaled (by 0.9414) Zero Point Vibrational Energy (zpe) 11863.8 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 QCISD/6-31G**
ABC
3.22489 0.71265 0.65251

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G**

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.016 -0.688 0.000
B2 -0.016 0.877 0.000
H3 1.047 -0.974 0.000
H4 -0.454 -1.135 0.892
H5 -0.454 -1.135 -0.892
H6 0.016 1.491 -1.021
H7 0.016 1.491 1.021

Atom - Atom Distances (Å)
  C1 B2 H3 H4 H5 H6 H7
C11.56481.10001.08971.08972.40632.4063
B21.56482.13392.24392.24391.19161.1916
H31.10002.13391.75281.75282.85982.8598
H41.08972.24391.75281.78413.28242.6707
H51.08972.24391.75281.78412.67073.2824
H62.40631.19162.85983.28242.67072.0414
H72.40631.19162.85982.67073.28242.0414

picture of methylborane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 B2 H6 121.017 C1 B2 H7 121.017
B2 C1 H3 105.072 B2 C1 H4 114.217
B2 C1 H5 114.217 H3 C1 H4 106.354
H3 C1 H5 106.354 H4 C1 H5 109.888
H6 B2 H7 117.873
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability