Mehrfachbindungen zwischen Hauptgruppenelementen und Übergangsmetallen, CIX. Strukturchemische Aspekte der Fluorolefin‐;Chemie von Osmiumtetraoxid: Halogenierte Osmatester und Folgeprodukte

Multiple Bonds Between Main Group Elements and Transition Metals, CIX. — Structural Aspects of Fluoroolefin Oxidation by Osmium Tetraoxide: Halogenated Osmate Esters and Their Products The crystal and molecular structures of the first fluorinated osmate ester 1, the dioxoosmium(VI) dichloride 2, and the dioxoosmium(VI) oxalate 3 have been determined by single‐crystal X‐ray diffraction. They all contain the trans‐osmyl group {OsO₂}²⁺ and cis‐oriented sets of ligands, typical of complexes (py)₂OsO₂X₂ (py = pyridine). Increasing electron‐withdrawing power of the ligands X entails shortening of the OsN bonds, resulting in higher stability of these complexes against dissociation of pyridine.