کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1308800 1499152 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The dominant steric effect in the synthesis of ammine hydrido- and chlorido-Ru(II)-N,N-dimethylhydrazine and mixed alkyl–aryl phosphine complexes: Novel methyldiazene reduction intermediates
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
The dominant steric effect in the synthesis of ammine hydrido- and chlorido-Ru(II)-N,N-dimethylhydrazine and mixed alkyl–aryl phosphine complexes: Novel methyldiazene reduction intermediates
چکیده انگلیسی


• Four novel ammine hydrido- and chlorido-NH2NMe2-Ru(II) complexes were synthesised.
• Four novel phosphine hydrido- and chlorido-Ru(II) complexes were isolated from subsequent reactions.
• Hydride resonance changes in the 1H NMR spectrum are studied in the PMe3 addition reaction.
• Steric and electronic properties of ligands were chemo- and regio-directing.

Novel cationic hydrido complexes [RuH(1,5-cod)(NH3)(NH2NMe2)2](X) (X = PF6, BPh4) and chlorido-ammine complexes [RuCl(1,5-cod)(NH3)2(NH2NMe2)](X) (X = PF6, BPh4), were isolated from the reaction of the polymeric [RuCl2(1,5-cod)]x with NH2NMe2. Reaction of the hydrido complexes with the phosphine ligands PMe3, PMe2Ph, P(OMe)2Ph resulted in the formation of monohydrido-phosphine complexes, whereas reaction with the bulkier PMePh2 ligand gave dihydrido-phosphine complexes. Similar reactions of the chlorido-ammine complexes with the phosphine ligands PMe3, PMe2Ph, P(OMe)2Ph, and PMePh2 all sequentially substituted the NH2NMe2 and the 1,5-cod ligands to give the chlorido-ammine phosphine complexes. All complexes were fully characterised and the single crystal X-ray structures were determined for [RuH{P(OMe)2Ph}5](BPh4), [RuH2(PMePh2)4], [{Ru(PMe2Ph)3}2(μ-F)3](PF6), fac-[RuCl(NH3)2(PMe2Ph)3](PF6), and [RuCl(NH3)(PMe2Ph)4](PF6). Intramolecular strain between coordinated σ-donor ligands in the Ru(II)-NH2NMe2 precursor complexes as well as the relative steric bulk of incoming σ-donor ligands were found to be chemically directing in the formation of monohydrido-, bishydrido-, mono-ammine, and bis-ammine ruthenium(II) complexes.

Novel cationic hydrido complexes [RuH(1,5-cod)(NH3)(NH2NMe2)2](X) (X = PF6, BPh4) and chlorido-ammine complexes [RuCl(1,5-cod)(NH3)2(NH2NMe2)](X) (X = PF6, BPh4), were isolated from the reaction of the polymeric [RuCl2(1,5-cod)]x with NH2NMe2. Reaction of the hydrido complexes with the phosphine ligands resulted in the formation of monohydrido- and dihydrido-phosphine complexes. Intramolecular strain between coordinated σ-donor ligands in the Ru(II)-NH2NMe2 precursor complexes as well as the relative steric bulk of incoming σ-donor ligands were found to be chemically directing in the formation of monohydrido-, bishydrido-, mono-ammine, and bis-ammine ruthenium(II) complexes.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Inorganica Chimica Acta - Volume 437, 1 October 2015, Pages 133–142
نویسندگان
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