High-yield one-step synthesis in water of [Pt3n(CO)6n]2− (n > 6) and [Pt38(CO)44]2−

Abstract

Carbonylation of Na₂PtCl₆·6H₂O, as well as K₂PtCl₆, in water under a CO pressure of 900 mm Hg selectively and quantitatively affords [Pt_3n(CO)_6n]²⁻ (n > 6) salts; conversely, their corresponding carbonylation at reduced CO pressure of 760–800 mm Hg leads to a convenient one-step synthesis of [Pt₃₈(CO)₄₄]²⁻.