return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for B2H6 (Diborane)

using model chemistry: MP2=FULL/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2H 1Ag
Energy calculated at MP2=FULL/6-31G*
 hartrees
Energy at 0K-53.002276
Energy at 298.15K-53.008211
HF Energy-52.812127
Nuclear repulsion energy32.213215
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 MP2=FULL/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 Ag 2707 2551 0.00 189.34 0.14 0.24
2 Ag 2277 2146 0.00 79.94 0.09 0.16
3 Ag 1248 1176 0.00 14.43 0.73 0.84
4 Ag 842 794 0.00 16.34 0.23 0.38
5 Au 878 827 0.00 0.00 0.00 0.00
6 B1g 2793 2632 0.00 91.07 0.75 0.86
7 B1g 970 914 0.00 2.04 0.75 0.86
8 B1u 2113 1991 13.29 0.00 0.00 0.00
9 B1u 1018 959 18.94 0.00 0.00 0.00
10 B2g 1970 1856 0.00 7.16 0.75 0.86
11 B2g 907 854 0.00 5.71 0.75 0.86
12 B2u 2805 2643 160.77 0.00 0.00 0.00
13 B2u 998 941 2.09 0.00 0.00 0.00
14 B2u 363 342 13.76 0.00 0.00 0.00
15 B3g 1083 1021 0.00 40.72 0.75 0.86
16 B3u 2693 2537 142.03 0.00 0.00 0.00
17 B3u 1818 1713 491.98 0.00 0.00 0.00
18 B3u 1240 1169 71.69 0.00 0.00 0.00

Unscaled Zero Point Vibrational Energy (zpe) 14361.2 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 13531.1 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 MP2=FULL/6-31G*
ABC
2.69227 0.61771 0.56712

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/6-31G*

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.875 0.000 0.000
B2 -0.875 0.000 0.000
H3 0.000 0.000 0.974
H4 0.000 0.000 -0.974
H5 1.455 1.039 0.000
H6 1.455 -1.039 0.000
H7 -1.455 1.039 0.000
H8 -1.455 -1.039 0.000

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6 H7 H8
B11.74941.30941.30941.18951.18952.55042.5504
B21.74941.30941.30942.55042.55041.18951.1895
H31.30941.30941.94872.03562.03562.03562.0356
H41.30941.30941.94872.03562.03562.03562.0356
H51.18952.55042.03562.03562.07712.90923.5746
H61.18952.55042.03562.03562.07713.57462.9092
H72.55041.18952.03562.03562.90923.57462.0771
H82.55041.18952.03562.03563.57462.90922.0771

picture of Diborane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
B1 H3 B2 83.832 B1 H4 B2 83.832
H3 B1 H4 96.168 H3 B1 H5 109.007
H3 B1 H6 109.007 H3 B2 H4 96.168
H3 B2 H7 109.007 H3 B2 H8 109.007
H4 B1 H5 109.007 H4 B1 H6 109.007
H4 B2 H7 109.007 H4 B2 H8 109.007
H5 B1 H6 121.645 H7 B2 H8 121.645
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability