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 HBBH (Diborane(2))

using model chemistry: CCSD=FULL/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes D*H 3ΣG
Energy calculated at CCSD=FULL/TZVP
 hartrees
Energy at 0K-50.633619
Energy at 298.15K-50.633540
HF Energy-50.437532
Nuclear repulsion energy15.388576
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 CCSD=FULL/TZVP
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 Σg 2857 2707 0.00      
2 Σg 1278 1211 0.00      
3 Σu 2815 2667 28.26      
4 Πg 490 464 0.00      
4 Πg 490 464 0.00      
5 Πu 609 577 0.07      
5 Πu 609 577 0.07      

Unscaled Zero Point Vibrational Energy (zpe) 4573.7 cm-1
Scaled (by 0.9475) Zero Point Vibrational Energy (zpe) 4333.6 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 CCSD=FULL/TZVP
B
0.84195

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD=FULL/TZVP

Point Group is D∞h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
B1 0.000 0.000 0.754
B2 0.000 0.000 -0.754
H3 0.000 0.000 1.928
H4 0.000 0.000 -1.928

Atom - Atom Distances (Å)
  B1 B2 H3 H4
B11.50891.17322.6821
B21.50892.68211.1732
H31.17322.68213.8553
H42.68211.17323.8553

picture of Diborane(2) state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
B1 B2 H4 180.000 B2 B1 H3 180.000
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability