Zur Reaktion des Diphosphenyl‐Komplexes (η5‐C5Me5)(CO)2Fe – P=P – Aryl (Aryl = 2,4,6‐tBu3C6H2) mit elektronenarmen Alkenen. Röntgenstrukturanalyse des Diphosphetans

Abstract

Transition‐Metal‐Substituted Diphosphenes, XVIII1). – On the Reactivity of the Diphosphenyl Complex (η5‐C5Me5)(CO)2Fe – P=P – Aryl (Aryl = 2,4,6‐tBu3C6H2) with Electron‐Deficient Alkenes. X‐ray Analysis of the Diphosphetane The transition‐metal‐substituted diphosphene (η5‐C5Me5)(CO)2Fe – P=P – Aryl (1) reacts with fumarodinitrile (2a) to give the 1,2 diphosphetane all‐trans‐ as the result of a [2 + 2] cycloaddition. Similarly, compound 1 is converted by either dimethyl fumarate (2b) or dimethyl maleate (2c) into the same cycloadduct all‐trans‐ (3b). Diphosphetane 3a was completely characterized by a single‐crystal X‐ray analysis.