The Unusual Stability of Homoleptic Di- and Tetravalent
Chromium Alkyls

Schulzke, Carola; Enright, Dave; Sugiyama, Hiroyasu; LeBlanc, Guy; Gambarotta, Sandro; P. A. Yap, Glenn; Thompson, Laurence K.; Wilson, David R.; Duchateau, Rob

doi:10.1021/om020237z.s002

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The Unusual Stability of Homoleptic Di- and Tetravalent Chromium Alkyls

journal contribution

posted on 2002-08-03, 00:00 authored by Carola Schulzke, Dave Enright, Hiroyasu Sugiyama, Guy LeBlanc, Sandro Gambarotta, Glenn P. A. Yap, Laurence K. Thompson, David R. Wilson, Rob Duchateau

Reaction of CrCl₃(THF)₃ with 3 equiv of R−M [R = Me₃CCH₂ (a), Me₃SiCH₂ (b)] afforded either the previously reported tetravalent homoleptic R₄Cr (1a, b) [M = MgCl] or the unprecedented divalent and tetranuclear homoleptic [R₂Cr]₄ (2b) [M = Li]. Both types of compounds display a remarkable chemical inertness toward proton transfer agents but readily react with ethylene.