Dihydrobis(methimazolyl)borato complexes of ruthenium and osmium. Issue 43 (18th October 2017)

• Record Type: Journal Article
• Authors: Foreman, Mark R. St.-J.; Ma, Chenxi; Hill, Anthony F.; Otten, Natalie E.; Sharma, Manab; Tshabang, Never; Ward, Jas S.
• Is Part Of: Dalton transactions. Volume 46:Issue 43(2017)
• Page Start: 14957
• Page End: 14972
• Publication Date: 2017-10-18
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/c7dt02420g
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : The reaction of Na[H2 B(mt)2 ] (mt = 2-mercapto, 3-methylimidazol-1-yl, methimazolyl) with [Ru(X)Cl(CO)(PPh3 ) n ] ( n = 3 X = H; n = 2 BO2 C6 H4, SiCl3, SiMe3 ) affords the complexes [Ru(X)(CO)(PPh3 ){κ 2 - H, S, S ′-H2 B(mt)2 }]. Abstract : The reaction of Na[H2 B(mt)2 ] (mt = 2-mercapto, 3-methylimidazol-1-yl, methimazolyl) with [Ru(X)Cl(CO)(PPh3 ) n ] ( n = 3 X = H; n = 2 BO2 C6 H4, SiCl3, SiMe3 ) affords the complexes [Ru(X)(CO)(PPh3 ){κ 2 - H, S, S ′-H2 B(mt)2 }]. Evidence is presented to also support the transient formation of [Ru(X)(CO)(PPh3 ){κ 2 - H, S, S ′-H2 B(mt)2 }] (X = CHCHPh, Ph) via a similar strategy, although these are unstable. The osmium complex [OsH(CO)(PPh3 ){κ 2 - H, S, S ′-H2 B(mt)2 }] is similarly obtained from [OsHCl(CO)(PPh3 )3 ] or [OsH(NCMe)2 (CO)(PPh3 )2 ]BF4 . The reaction of [RuH(CO)(PPh3 ){κ 2 - H, S, S ′-H2 B(mt)2 }] with chloroform or diphenyldiselenide provides [Ru(X)(CO)(PPh3 ){κ 2 - H, S, S ′-H2 B(mt)2 }] (X = Cl, SePh), the latter reaction also providing traces of [Ru(SeH)(CO)(PPh3 ){κ 2 - H, S, S ′-H2 B(mt)2 }]. Spectroscopic and structural data for the series [Ru(X)(CO)(PPh3 ){κ 2 - H, S, S ′-H2 B(mt)2 }] are discussed in terms of perturbations on the B–H–Ru interaction by the trans -ligand X.