The PdO catalysed reaction between Re(CO)5X (X  Cl, Br, I) and L (L  Group 15 donor ligand). Synthesis of Re(CO)4LX

Probing Surface Sites of TiO2: Reactions with [HRe(CO)5] and [CH3Re(CO)5]

“…[25,29,31] Peaks at frequencies similar to those observed with our samples have been observed for rhenium tetracarbonyls in solution, [42] a result that suggests that similar species formed on our samples.…”

“…However, the decarbonylation was less complete than that of [HRe(CO) 5 ], as indicated by the EXAFS data, which demonstrate the presence of more carbonyl ligands per Re atom (approximately four) than on the supported rhenium made from [HRe(CO) 5 ]. This result was confirmed by the IR spectra, which suggest the presence of rhenium tetracarbonyls [42] (as well as other rhenium carbonyls).…”

The Synthesis, X-ray Crystal Structure, and Molecular Structure of Rhenium Tetra- carbonylbromidetrimethylamineisocyanoborane

“…The most convenient procedure to obtain pure [M(CO) 4 LX] (M = Mn, Re) compounds is to treat the metal dimer [M(CO) 4 Br] 2 with L under mild conditions. , This normally gives the cis product. We report here that trimethylamine−isocyanoborane most likely interacts with [Re(CO) 4 Br] 2 by direct cleavage of the bridging halide to give a cis -tetracarbonyl complex as the major product with a minor trans product.…”

Low-valent Organorhenium Compounds

“…81 The substitution reactions o f [ReX(CO) 5 ] (X = Cl, Br) with group 1 5 donor ligands are catalyzed by PdO, as was observed for the substitution reactions of [Re 2 (CO) 10 ]. 82 ' 83 The reaction of [ReBr(CO) 5 ] with phosphinimines (Ph 3 P=NR) gives the isocyanide complexes [ReBr(CO) 4 (CNR)] (R = Pr 1 , Ph) in >96% yield, and the monosubstitution product reacts with additional phosphinimine to give diisocyanide complexes in 73-76% yields. 84 Substituted rhenium(I) carbonyl complexes of formula [ReI(CO) 5 85 Protonation of alkylmetal complexes with HX is also a useful route toward metal halide complexes and these reactions are discussed in Section 9.…”

“…194 Substitution of the r|-Cp ligand by the pure a-donor 1,4,7-triazocyclononane ligand has been used to stabilize more highly charged analogues of [Re(CO)(L)(NO)(Cp)] + . Thus, hydride reduction of dication (82) generates cationic formyl and methyl (83) complexes (Scheme 18). 195 ' 196 The enantiomers of (83) were resolved as (lS)-3-bromocamphorsulfonate salts and treatment of optically pure (83) with aqueous acid gave methane and the halide complex with retention of configuration at rhenium.…”