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 Al2H6 (dialane)

using model chemistry: CISD/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 CISD/6-31G
 hartrees
Energy at 0K-487.327134
Energy at 298.15K-487.333882
HF Energy-487.210092
Nuclear repulsion energy75.368448
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 CISD/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 1885 1768 0.00      
2 Ag 1468 1377 0.00      
3 Ag 709 665 0.00      
4 Ag 365 342 0.00      
5 Au 425 399 0.00      
6 B1g 1904 1786 0.00      
7 B1g 463 434 0.00      
8 B1u 1183 1110 451.68      
9 B1u 619 581 244.94      
10 B2g 1297 1217 0.00      
11 B2g 431 404 0.00      
12 B2u 1910 1792 406.60      
13 B2u 892 836 366.89      
14 B2u 238 223 8.10      
15 B3g 778 729 0.00      
16 B3u 1875 1759 127.65      
17 B3u 1415 1327 1446.57      
18 B3u 663 622 727.57      

Unscaled Zero Point Vibrational Energy (zpe) 9260.7 cm-1
Scaled (by 0.9378) Zero Point Vibrational Energy (zpe) 8684.6 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 CISD/6-31G
ABC
1.50107 0.14091 0.13440

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

Point Group is D2h

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
Al1 1.362 0.000 0.000
Al2 -1.362 0.000 0.000
H3 0.000 0.000 1.162
H4 0.000 0.000 -1.162
H5 2.046 1.453 0.000
H6 2.046 -1.453 0.000
H7 -2.046 1.453 0.000
H8 -2.046 -1.453 0.000

Atom - Atom Distances (Å)
  Al1 Al2 H3 H4 H5 H6 H7 H8
Al12.72311.78991.78991.60611.60613.70453.7045
Al22.72311.78991.78993.70453.70451.60611.6061
H31.78991.78992.32372.76542.76542.76542.7654
H41.78991.78992.32372.76542.76542.76542.7654
H51.60613.70452.76542.76542.90584.09235.0190
H61.60613.70452.76542.76542.90585.01904.0923
H73.70451.60612.76542.76544.09235.01902.9058
H83.70451.60612.76542.76545.01904.09232.9058

picture of dialane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
Al1 Al2 H3 40.474 Al1 Al2 H4 40.474
Al1 Al2 H7 115.229 Al1 Al2 H8 115.229
Al1 H3 Al2 99.052 Al1 H4 Al2 99.052
Al2 Al1 H3 40.474 Al2 Al1 H4 40.474
Al2 Al1 H5 115.229 Al2 Al1 H6 115.229
H3 Al1 H4 80.948 H3 Al1 H5 108.919
H3 Al1 H6 108.919 H3 Al2 H4 80.948
H3 Al2 H7 108.919 H3 Al2 H8 108.919
H4 Al1 H5 108.919 H4 Al1 H6 108.919
H4 Al2 H7 108.919 H4 Al2 H8 108.919
H5 Al1 H6 129.542 H7 Al2 H8 129.542
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability