A Sensitive Spectroscopic Probe for Monitoring Changes in the Coordination Sphere of Titanium: Eight‐Membered Dioxatitanacycles and Their Organometallic Derivatives

Abstract

In view of the considerable importance of titanium compounds in organic synthesis model studies are especially advantageous. TiCl4 reacts with MBPH2 with evolution of HCl to give [(mbp)TiCl2], an eight-membered heterocycle containing an OTiO unit and oppositely disposed CH2 groups. Its 1 H NMR signals respond sensitively to changes at the Ti atom which are caused, e.g., by alkylations and arylations and by increasing the coordination number.