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

using model chemistry: QCISD(T)/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(T)/cc-pVDZ
 hartrees
Energy at 0K-51.845620
Energy at 298.15K-51.848079
HF Energy-51.636911
Nuclear repulsion energy21.928179
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(T)/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 1220 1163        
2 A1 854 814        
3 B1 500 476        
4 B2 1154 1100        
5 E 2633 2509        
6 E 2632 2509        
7 E 2576 2455        
7 E 2556 2436        
8 E 1001 954        
8 E 1001 954        
9 E 430 410        
9 E 429 409        

Unscaled Zero Point Vibrational Energy (zpe) 8493.1 cm-1
Scaled (by 0.9531) Zero Point Vibrational Energy (zpe) 8094.8 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(T)/cc-pVDZ
ABC
3.92519 0.63778 0.63778

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/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 1.479
H4 0.000 -1.032 1.479
H5 1.032 0.000 -1.479
H6 -1.032 0.000 -1.479

Atom - Atom Distances (Å)
  B1 B2 H3 H4 H5 H6
B11.67601.21521.21522.53682.5368
B21.67602.53682.53681.21521.2152
H31.21522.53682.06433.29923.2992
H41.21522.53682.06433.29923.2992
H52.53681.21523.29923.29922.0643
H62.53681.21523.29923.29922.0643

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 121.857 B1 B2 H6 121.857
B2 B1 H3 121.857 B2 B1 H4 121.857
H3 B1 H4 116.287 H5 B2 H6 116.287
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability