Synthesis and Structure of η4-Enone Complexes of Ruthenium(0)

✍ Scribed by Alessandro Marcuzzi; Anthony Linden; Wolfgang von Philipsborn

• Publisher: John Wiley and Sons
• Year: 1993
• Tongue: German
• Weight: 648 KB
• Volume: 76
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.19930760220

✦ Synopsis

Abstract

A variety of [Ru(CO)~2~L(η^4^enone)] complexes (L = phosphines, phosphites, and arsines, enone = (E)‐4‐phenylbut‐3‐en‐2‐one) have been synthesized. ^1^H‐, ^13^C‐, and ^31^P‐NMR spectra are reported and the X‐ray structures of two Ru complexes with L  Ph~3~P(7), Et~3~P (10) and one Fe complex with L  Ph~3~P (14) are presented. All three compounds crystallize in the same monoclinic space group __P__2~1~/n with a = 10.575(2) Å, b =9.213(2) Å, and c = 27.608(5) Å, β = 100.04(2)°, Z = 4 for 7, a = 10.276(3) Å, b = 12.935(3) Å, and c = 14.854(2) Å, β = 96.96(2)°, Z = 4 for 10, and a = 10.492(2) Å, b = 9.232(3) Å, and c = 27.129(3) Å, β = 98.67(2)°, Z = 4 for 14. The structures of the Ru complexes are compared with the Fe analogues. In the case of M  Ru and L  (EtO)~3~P, (MeO)~3~P, and (i‐PrO)~3~P (9, 11, and 13, respectively) stereoisomers could be detected by ^31^P‐NMR at room temperature, wich arise from rotation at the coordinated metal centre.