Chemistry of polynuclear compounds. Part XI. Some Lewis-base adducts of mercuric halides and stannic chloride with substituted metal carbonyls of chromium, molybdenum, tungsten, and iron

Abstract

The reactions of mercuric halides (HgX₂) with a number of Group VI substituted carbonyl derivatives have been investigated and the compounds (π-C₆H₃Me₃)M(CO)₃,2HgX₂(M = Cr, X = Cl; M = Mo, X = Cl or Br), (1,3,5-C₇H₈)Mo(CO)₃,HgX₂(X = Cl or Br; 1,3,5-C₇H₈= cyclohepta-1,3,5-triene), bipy M(CO)₃,HgX₂(M = Mo or W; X = Cl or Br; bipy = 2,2′-bipyridyl), bipy W(CO)₃,2HgCl₂, diphos M(CO)₄,HgCl₂(M = Mo or W; diphos = 1,2-diphenylphosphinoethane), diphos₂M(CO)₂,2HgX₂(M = Mo or W; X = Cl, Br, or I) isolated. Reaction of Ph₃PFe(CO)₄ with mercuric chloride yields the compounds Ph₃PFe(CO)₄,2HgCl₂. The bipy M(CO)₄ compounds (M = Mo or W) also react with stannic chloride to give complexes bipy M(CO)₃,SnCl₄. Conductivity, i.r., and some magnetic data are given and possible formulations are suggested. Many of these derivatives are best formulated as Lewis acid–base adducts with donation from the transition metal to the mercury halide.