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Me2SO complexes with Fe(III) via Fe-O bonds but with Pt(II) via Pt-S bonds--explain why.

Me2SO complexes with Fe(III) via Fe-O bonds but with Pt(II) via Pt-S bonds--explain why.

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Answer #1

This problem can be approached by HSAB principle ( hard soft acid base) . In this case Fe is hard species due high electronegativity , lesser size etc and Pt is soft species due to low electronegativity , large size . and we can anayse oxygen and sulfar in the same light , - oxygen being hard and sulfer being soft. so according to HSAB , soft species will tend to bind will soft species and hard species will combine with hard one.. So we can say that Fe complexes with O bocoz both of them are hard species and Pt complexes with S bocoz both of them are soft.

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