303993-86-4Relevant academic research and scientific papers
Versatile coordination modes and transformations of the cyclooctatriene ligand in Ru(C8H10)L3 (L = tertiary phosphine)
Komiya, Sanshiro,Planas, Jose Giner,Onuki, Koji,Lu, Zhaobin,Hirano, Masafumi
, p. 4051 - 4059 (2000)
Reaction of Ru(η4-C8H12)(η6-C8H10) (1) or Ru(η4-C8H11)2 (2) with tertiary phosphines gives Ru(η4-C8H10)L3 [L = PMe3 (4a), PMe2Ph (4b), PEt3 (4c), PEt2Ph (4d), P(n-Bu)3 (4e)]. The cyclooctatriene moiety in 4a oxidatively adds to the ruthenium, giving Ru(6-η1:1-3-η3-C8H10)L3 [L = PMe3 (3a), PMe2Ph (3b)]. Complexes 4c-e dissociate one phosphine ligand in solution, affording the (hydrido)ruthenium complexes RuH(η5-C8H9)L2 [L = PEt3 (5c), PEt2-Ph (5d), P(n-Bu)3 (5e)]. Whereas prolonged heating of 4c at 70°C caused disproportionation of the η4-C8H10 moiety giving a mixture of the cyclooctatetraene complex Ru(η4-C8H8)(PEt3)3 (6) and RuH(η5-C8H11)(PEt3)2 (7), heating of 1 with PEt3, 4c or 4d in the presence of 1,5-C8H12 at 70°C gave Ru(η4-bicyclo[4.2.0]octa-2,4-diene)L3 [L = PEt3 (8a), L = PEt2Ph (8b)]. The molecular structures of 3b, 4c, 6, and 8b have been established by X-ray structure analysis.
