Nicholas C. Thomas

Ruthenium Carbonyl Complexes of N-Heterocyclic Molecules. Part 2. Preparation, Protonation and Decarbonylation Reactions of Complexes with a Bidentate Terpyridyl Ligand. Structure of [Ru(CO)2(phen)(tpyH)](BF4)3

Abstract The complexes Ru(CO)2(CF3SO3)2(bidentate) {bidentate = 2,2′-bipyridyI (bpy) or 1,10-phenanthroline (phen)} react with 2,2′:6′,2″-terpyridyl (tpy) forming octahedral [Ru(CO)2(bidentate)(tpy)]2 + compounds (II) which contain a bidentate tpy. Complex II (bidentate = phen) can be protonated to give [Ru(CO)2-(phen)(tpyH)](BF4)3, the structure of which has been established by X-ray crystallography. Treatment of II with trimethylamine N-oxide in methanol at room temperature gives the monocarbonyl compounds [Ru(CO)(bidentate)(tpy)]2+ (IV) which contain a tridentate tpy. Complex IV is also obtained by photolysis of II.

Ruthenium carbonyl complexes of N-heterocyclic molecules Part 3. Synthesis of ruthenium complexes of the ambidentate ligand 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole (APT). X-ray crystal structures of two coordination isomers of Ru(CO)2Cl2(APT)

Abstract 4-Amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole (APT), a poly- and ambidentate ligand, forms two bidentate coordination isomers of Ru(CO) 2 Cl 2 , which in one case is coordinated to a pyridyl ring and an adjacent triazole ring ( A ), and in the other case to a pyridyl ring and the amino nitrogen atom ( B ). Both isomers of Ru(CO) 2 Cl 2 (APT) have been crystallographically characterized: A , orange, orthorhombic, Pbca , a =15.332(4), b =17.715(4), c =13.083(4) A, R ( F )=3.26%; B (MeOH), yellow, triclinic, P 1 , a =8.712(2), b =9.492(2), c =12.142(2) A, α=86.03(2), β=82.63(2), γ=74.21(2)°, R ( F )=3.49%. The complexes are formed directly from the reaction of [Ru(CO) 2 Cl 2 ] n with APT in boiling MeOH. In a similar reaction with Re(CO) 5 Cl, Re(CO) 3 Cl(APT) is formed. The Br analogue of the Ru complex forms predominantly the yellow isomer ( B ), while the I analogue crystallizes only as the orange isomer ( A ). Based on NMR data, the Re complex most likely coordinates via the A mode.

Synthesis of monometallic and bimetallic 2,2′-bipyrimidine and 2,3-bis(2-pyridyl)pyrazine complexes of ruthenium, platinum and palladium

Abstract The reaction of 2,2′-bipyrimidine (bpym) or 2,3-bis(2-pyridyl)pyrazine (dpp) with [Ru(CO) 2 Cl 2 ] n gives the monometallic Ru(CO) 2 Cl 2 (bidentate) (bidentate = bpym or dpp) complexes. The Ru(CO) 2 Cl 2 (bidentate) complexes react further with [Ru(CO) 2 Cl 2 ] n or with MCl 2 (dmso) 2 (M = Pt, Pd) to yield the homobimetallic Cl 2 (CO) 2 Ru(bidentate) Ru(CO) 2 Cl 2 or heterobimetallic C1 2 M(bidentate)Ru(CO) 2 C1 2 complexes, respectively. The complexes have been characterized by microanalysis and electronic absorption and IR spectroscopy.

Substituted osmium carbonyl halides

cet article presente une synthese des travaux concernant la chimie des complexes halogenes et carboxyles de losmium. Preparation et reactivite chimique de nombreux produits derives de ces complexes. Les principaux coordinats organiques sont des phosphines tertiaires, des amines substituees et des composes heterocycliques

Synthesis of Ruthenium(II) Carbonyl Chloride Complexes Containing N-Donor Bidentate Ligands

Abstract A series of new Ru(CO)2Cl2L compounds (L=bidentate N-donor ligand) have been prepared by the reaction of [Ru(CO)2Cl2]n with L in methanol. The complexes have been characterized by elemental analysis, conductivity measurements and spectroscopic data and have trans-chlorines and cis-carbonyl ligands.

New dimeric ruthenium(II) carbonyl complexes containing a bridging 2,2'-bipyrimidine ligand

Preparation de [Ru(CO) 2 (bpyrm)L] 2+ qui par reaction avec [Ru(CO) 2 Cl 2 ] n donne de nouvelles especes [Ru(CO) 2 Cl 2 (bpyrm)Ru(CO) 2 L](PF 6 ) 2

Preparation of a novel rhodium porphyrin dimer containing a bridging 4,4'-bipyridyl ligand

Reaction de Rh(OEP)Cl avec le bipyridyle-4,4p. Caracterisation spectroscopique du nouveau produit dinucleaire [ClRh(OEP)(bipyridyl-4,4p)Rh(OEP)Cl]. OPE=octaethylporphyrine

Trimethylamine oxide induced decarbonylation of M(CO)2Cl2(PPh3)2 (M = Ru, Os) complexes

La decarbonylation du complexe en presence de phenanthroline aboutit a la formation de [M(CO)Cl(phen)(PPh 3 ) 2 ] + . Breve presentation des conditions de synthese

Reactions of ruthenium(II) carbonyl complexes

Etude des reactions des complexes [Ru(CO) 2 X 2 (bidente)] 4+ dans pyridine et acetonitrile (L). Reactivite des produits Ru(CO)X 2 L(bidente) (bidente=phenanthroline et bipyridyle)