Coordination of Divalent Metal Cation to 1,2-Hexadecanediol to Form Adduct Ion in Fast Atom Bombardment Mass Spectrometry

Abstract

Coordination of metal cation (Mg²⁺, Ca²⁺, Ba²⁺, Mn²⁺, Fe²⁺, Co²⁺) (reagent: MCl₂) to oxygens in 1,2-hexadecanediol (L) affords ion peaks [L+M²⁺-H⁺]⁺ (A), [L+M²⁺+Cl^-]⁺ (B), [2L+M²⁺-H₂O+Cl^-]⁺ (C), [2L+M²⁺+Cl^-]⁺ (D) in positive ion fast atom bombardment mass spectrometry. The plausible structures suggest that the divalent metal ions coordinate to two to four oxygens. The metal cation Fe³⁺ is reduced to Fe²⁺, which forms the ion peaks B, C, and D.