Schrock-Type Silylene/Germylene Complexes of Transition Metals: On the Way to the Si or Ge Versions of Metathesis Process

2014 Fiscal Year Final Research Report

• Project/Area Number: 24550038
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Organic chemistry
• Research Institution: University of Tsukuba
• Principal Investigator: LEE Vladimir 筑波大学, 数理物質系, 講師 (90375410)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: cycloaddition / germylene / metathesis / Schrock complex / silylene

Outline of Final Research Achievements

Metathesis of unsaturated hydrocarbons is among the most technologically useful alkene transformations. The Si and Ge variations of the metathesis represent a new promising route for the synthesis of the highly reactive multiply-bonded organosilicon and organogermanium compounds as precursors for the advanced materials of the new generation. In this project we developed the first examples of the Schrock-type alkylidene complexes of Si and Ge, namely, silylidenes and germylidenes, of the early transition metals. Thus, stable silylene and germylene complexes of the group 4 metals were prepared, isolated, structurally characterized, and computationally studied. All data support classification of such complexes as Schrock-type silylidenes and germylidenes, which react with unsaturated substrates (alkynes, alkenes, nitriles) forming the corresponding [2 + 2] cycloadducts, whose particular structures and cycloreversion were studied both experimentally and computationally.

Free Research Field

有機化学