Synthesis of low-valent silicon compounds by the facile preparation of bulky alkyl groups

2014 Fiscal Year Final Research Report

• Project/Area Number: 25620020
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Organic chemistry
• Research Institution: Tohoku University
• Principal Investigator: ISHIDA Shintaro 東北大学, 理学(系)研究科(研究院), 講師 (90436080)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: ケイ素 / 低配位化合物 / アルキル基 / ジシリン / 遷移金属錯体

Outline of Final Research Achievements

(1) A new isolable dialkyldisilyne was fully characterized. Thermolysis of the dialkyldisilyne gave not the corresponding silylyne but bi(silacyclopropane)s. Disilyne- palladium and platinum complexes are successfully obtained by the ligand exchange reactions. The isolable disilyne coordinates to the transition metals in a side-on fashion and these complexes has trans-bent geometry in contrast to the corresponding alkyne complexes. These complexes showed significant metallacycle character.
(2) A tetraalkyl-substituted spiropentasiladiene was newly synthesized and characterized. The tetraalkylspiropentasiladiene show several absorption bands around 320-450 nm in solution due to non-degenerated HOMO/HOMO-1 and LUMO/LUMO+1. Chlorination and ring expansion reaction of spiropentasiladiene were conducted.

Free Research Field

典型元素化学