title: Reactivity of cyclopentadienyl transition metal(ii) complexes with borate ligands: structural characterization of the toluene-activated molybdenum complex [Cp*Mo(CO)2(η3-CH2C6H5)].
abstract: Reactions of cyclopentadienyl transition-metal halide complexes [Cp*Mo(CO)3Cl], 1, and [CpFe(CO)2I], 2, (Cp = C5H5; Cp* = η5-C5Me5) with borate ligands are reported. Treatment of 1 with [NaBt2] (Bt2= dihydrobis(2-mercapto-benzothiazolyl)borate) in toluene yielded [Cp*Mo(CO)2(C7H4S2N)], 3, and [Cp*Mo(CO)2(η3-CH2C6H5)], 4, with a selective binding of toluene through C-H activation followed by orthometallation. Note that compound 4 is a structurally characterized toluene-activated molecule in which the metal is in η3-coordination mode. Under similar reaction conditions, [NaPy2] (Py2= dihydrobis(2-mercaptopyridyl)borate) produced only the mercaptopyridyl molybdenum complex [Cp*Mo(CO)2(C5H4SN)], 5, in good yield. On the other hand, when compound 2 was treated individually with [NaBt] (Bt = trihydro(2-mercapto-benzothiazolyl)borate) and [NaPy2] in THF, formation of the η1-coordinated complexes [CpFe(CO)2(C7H4S2N)], 6, and [CpFe(CO)2(C5H4SN)], 7, was observed. The solid-state molecular structures of compounds 3, 4, 6, and 7 have been established by single-crystal X-ray crystallographic analyses.
authors.affiliation: Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India. sghosh@iitm.ac.in and Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de, Rennes 1, F-35042 Rennes Cedex, France. halet@univ-rennes1.fr.
authors.forename: Rongala
authors.initials: R
authors.lastname: Ramalakshmi
authors.affiliation: Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India. sghosh@iitm.ac.in.
authors.forename: K
authors.initials: K
authors.lastname: Maheswari
authors.affiliation: Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India. sghosh@iitm.ac.in.
authors.forename: Dudekula
authors.initials: D
authors.lastname: Sharmila
authors.affiliation: Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India. sghosh@iitm.ac.in.
authors.forename: Anamika
authors.initials: A
authors.lastname: Paul
authors.affiliation: Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de, Rennes 1, F-35042 Rennes Cedex, France. halet@univ-rennes1.fr.
authors.forename: Thierry
authors.initials: T
authors.lastname: Roisnel
authors.affiliation: Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de, Rennes 1, F-35042 Rennes Cedex, France. halet@univ-rennes1.fr.
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Halet
authors.affiliation: Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India. sghosh@iitm.ac.in.
authors.forename: Sundargopal
authors.initials: S
authors.lastname: Ghosh