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Bad Calculated Bond Lengths

List of molecules with calculated bond lengths that differ by more than 0.050 Å from experimental bond lengths.

Calculated at CISD/6-31G**

Species Name Bond type Bond Length (Å)
Experimental Calculated Difference
CH3CH2SH ethanethiol rCH 1.095 1.823 0.728
CH3CH2SH ethanethiol rCH 1.089 1.521 0.432
CH3CH2SH ethanethiol rCH 1.092 1.521 0.429
CH3CH2SH ethanethiol rCS 1.820 1.521 -0.299
CH3CH2SH ethanethiol rCC 1.528 1.823 0.295
Si2 Silicon diatomic rSiSi 2.246 2.161 -0.085
6 molecules.