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

using model chemistry: QCISD(TQ)/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D2D 1A1
Energy calculated at QCISD(TQ)/cc-pVDZ
 hartrees
Energy at 0K-51.846278
Energy at 298.15K-51.848737
HF Energy-51.636904
Nuclear repulsion energy21.925288
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(TQ)/cc-pVDZ
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 1219 1219        
2 A1 854 854        
3 B1 500 500        
4 B2 1154 1154        
5 E 2631 2631        
6 E 2631 2631        
7 E 2575 2575        
7 E 2555 2555        
8 E 1001 1001        
8 E 1001 1001        
9 E 430 430        
9 E 429 429        

Unscaled Zero Point Vibrational Energy (zpe) 8488.2 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 8488.2 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(TQ)/cc-pVDZ
ABC
3.92418 0.63761 0.63761

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(TQ)/cc-pVDZ

Point Group is D2d

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.838
B2 0.000 0.000 -0.838
H3 0.000 1.032 1.480
H4 0.000 -1.032 1.480
H5 1.032 0.000 -1.480
H6 -1.032 0.000 -1.480

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.67621.21541.21542.53722.5372
B21.67622.53722.53721.21541.2154
H31.21542.53722.06463.29973.2997
H41.21542.53722.06463.29973.2997
H52.53721.21543.29973.29972.0646
H62.53721.21543.29973.29972.0646

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 121.858 B1 B2 H6 121.858
B2 B1 H3 121.858 B2 B1 H4 121.858
H3 B1 H4 116.284 H5 B2 H6 116.284
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability