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All results from a given calculation for B2H4 (Diborane(4) D2d)

using model chemistry: MP2=FULL/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at MP2=FULL/3-21G*
 hartrees
Energy at 0K-51.443843
Energy at 298.15K-51.446429
HF Energy-51.339558
Nuclear repulsion energy22.164284
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/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 A1 2634 2497 0.00      
2 A1 1258 1193 0.00      
3 A1 886 840 0.00      
4 B1 553 525 0.00      
5 B2 2615 2479 69.61      
6 B2 1215 1152 10.23      
7 E 2692 2552 69.16      
7 E 2692 2552 69.16      
8 E 1032 979 31.78      
8 E 1032 979 31.78      
9 E 470 446 2.31      
9 E 470 446 2.31      

Unscaled Zero Point Vibrational Energy (zpe) 8775.0 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 8318.7 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/3-21G*
ABC
4.01290 0.65191 0.65191

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.828
B2 0.000 0.000 -0.828
H3 0.000 1.021 1.465
H4 0.000 -1.021 1.465
H5 1.021 0.000 -1.465
H6 -1.021 0.000 -1.465

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.65641.20331.20332.51042.5104
B21.65642.51042.51041.20331.2033
H31.20332.51042.04163.26693.2669
H41.20332.51042.04163.26693.2669
H52.51041.20333.26693.26692.0416
H62.51041.20333.26693.26692.0416

picture of Diborane(4) D2d state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
B1 B2 H5 121.971 B1 B2 H6 121.971
B2 B1 H3 121.971 B2 B1 H4 121.971
H3 B1 H4 116.058 H5 B2 H6 116.058
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability