Diacetylenic derivatives of Fe₂(CO)₆(μ-EE'): spectroscopic investigations of Fe₂(CO)₆{μ-EC(H) = C(C≡ CMe)E'} (E = E', E ≠ E'; E, E' = S, Se, Te)

Abstract

The diacetylenic adducts, Fe₂(CO)₆{μ-EC(H) = C(C ≡ CMe)E'} (E = E', E E; E, E' = S, Se, Te) (1-8) have been obtained from the room temperature stirring of Fe₂(CO)₆(μ-EE') with HC CC CMe in methanol solvent containing sodium acetate. Compounds 1-8 have been characterized by IR and multinuclear NMR (¹H, ¹³C, ⁷⁷Se, and ^l25Te) spectroscopy. Trends in the chemical shifts of ⁷⁷Se and ¹²⁵Te NMR spectra of Fe₂(CO)₆{-EC(H) = C(C≡CMe)E'} with a variation of EE' are discussed.