Platinum complexes containing

F-Cyclooctene is chiral, and it was resolved into enantiomers by Cope and coworkers100 by separation of diasteromeric platinum complexes containing 20 and (+)-phenyl-2-aminopropane as ligands. Thermal racemization occurred around 150 °C with a rate... 

Finally, a rare example of tellurophene chemistry has to be mentioned, namely the preparation and spectroscopic studies of a platinum complex containing two ethynyl(tellurophen-2-yl)units <07IC7232>. 

F parameters for a wide range of palladium and platinum complexes containing the SCF3 group are reported in refs. 122, 177-179. The chemical shifts lie in the range —19-7 to -27-5 for both mononuclear [319]—[321] and dinuclear [322] complexes. The nickel complex trans-... 

Resolution of lj-cyclononadiene. Cope et al. examined the resolution of the cyclic allene 1,2-cyclononadiene (1) by way of the diastereomeric platinum complex containing this amine (compare resolution of cycloalkenes (2, 272-273)). A... 

The spectroscopic properties of platinum complexes containing bidentate C-deprotonated 2-phenylpyridine or 2-(2 -thienyl)pyridine ligands was previously studied by von Zelewsky [14] and others [15]. These complexes typical-... 

Extensive mechanistic studies have been performed on reactions catalyzed by rhodium and platinum complexes containing enantiopure C2-symmetric diphosphine ligands.As discussed above, (1) the formation of the Tr-olefin-Rh(H) complex 19, (2) stereospecific cis addition of the hydridorhodium to the coordinated olefin to form the alkyl-Rh complex 20 (and then 2, and (3) the migratory insertion of a carbonyl ligand giving the acyl-Rh complex 17 with retention of configuration, have been established in the hydroformylation of 1-alkenes or substituted ethenes. Thus, it is reasonable to assume that the enantioselectivity of the reaction giving a branched aldehyde is determined at the diastereomeric (1) TT-olefin-Rh complex 19 formation step, (2) alkyl-Rh complex 20 formation step, or (3) acyl-Rh complex 17 formation step. 

In this chapter, we will consider the reactions of C-H compounds, such as alkanes, arenes as well as some others, with platinum complexes containing mainly chloride ligands. The reactions of alkanes with platinum(II) complexes have been the first examples of true homogeneous activation of saturated hydrocarbons in solution. Complexes of Pt(II) exhibit both nucleophilic and electrophilic properties, they do not react with alkanes via a typical oxidative addition mechanism nor can they be regarded as typical oxidants. Due to this, it is reasonable to discuss their reactions in a special chapter which is a bridge between previous chapters (devoted to the low-valent complexes) and further sections of the book that consider mainly complexes in a high oxidation state. Chloride cortplexes of platinum(IV) are oxidants and electrophiles and they will constitute the first subjects in our discussion of processes of electrophilic substitution in arenes and alkanes as well as their oxidation. 

Platinum complexes. From di[2,5-diphenyl-l,3,4-oxadiazole-C-2"Al-3]-platinum(ll) doped PVK devices with greenish-yellow electrophosphorescence could be obtained. A blend of PVK and PBD was used as the host matrix and a bicyclic platinum complex containing the 1,3,4-oxadi-azole moiety in 2% doping concentration was added. No emission from either PVK or PBD was observed in the devices. 

Parrinello G, Stille JK (1987) Asymmetric hydroformylation catalyzed by homogeneous and polymer-supported platinum complexes containing chiral phosphine ligands. J Am Chem Soc 109 7122-7127... 

The Reactivity of Platinum Complexes Containing HemilabUe Ligands Towards Silanes and Stannanes... 

The doubly bridged cobalt and, in one case, platinum complexes contain an 0 and an amide or hydroxo bridge.The superoxo... 

Several systems for selective catalytic reactions based on Shilov s system have been developed with oxidants more practical than platinum(IV). Periana reported two different systems for the oxidation of methane in sulfuric acid containing SO,. One of the catalysts is a simple mercuric halide, and reactions catalyzed by this mercury compound generated methyl sulfate with turnover frequencies of 10" s" . The second system is more reactive and is based on a platinum complex containing a bipyrimidine ligand (Equation 18.7). In this case, methane is converted to methyl bisulfate with 81% selectivity, greater than 500 turnovers, and a turnover frequency of 10 s" . These reactions are selective for the functionalization of methane to this methanol derivative because the electron-withdrawing... 

More recently, platinum complexes containing pyridyl type of ligands have been used to afford polyynes (Fig 8.38) [69]. 

J. C. Bailar, Jr., and Hiroshi Itatani, Homogeneous Catalysis in the Reactions of Olefinic Substances. VI. Selective Hydrogenation of Methyl Linoleate and Isomerization of Methyl Oleate by Homogeneous Catalysis with Platinum Complexes Containing Triphenylphosphine, Arsine or Stibine, J. Am. Chem. Soc. 89 1592 (1967). 

As a result of an unexpected metal-induced phosphoryl migration reaction from carbon to nitrogen, ligand 47 can display different isomeric forms that lead to the formation of a cationic bis-chelated platinum complex containing a rearranged and an intact ligand 47 as part of a six-membered and a four-membered chelate (Scheme 14.26). 

The vast majority of A-heterocyclic carbenes contains the carbene in a five-membered ring with two adjacent nitrogen atoms. We consider platinum complexes containing these ligands first, and deal with the cases of those derived from a six-membered ring with one or two nitrogen atoms at the end of this section. 

Ferrocenylmethylamine also functions as a chelating bidentate ligand, and the cyclometallated platinum complex contains a planar chirality. The complex with the cyclometallated (7V,A-dimethylamino)methylferrocene and methyl phenyl sulfoxide ligands 469 is obtained as a mixture of the two diastereomers having the planar chirality and chiral sulfur atom. ... 

The intercalation of platinum complexes containing bidentate or tridentate aromatic amines was first proposed for binding to tRNA and then to DNA [53]. The structures of the relevant complexes of palladium and platinum are shown in Figure 1.5 and a requisite is the presence of planar ligands such as bipyridine, terpyridine, or o-phenanthroline, which are coplanar with the coordination plane formed by the four ligand donor atoms and the metal ion. The similar pyridine derivative, [Pt(en)py2], where the pyridine Ugands are forced by nonbonded steric constraints to be out of the coordination plane, does not intercalate. 

With platinum complexes containing longer alkyl ligands, it is even possible, using an analogous oxidative addition process, to observe 6- or -elimination. 

Recently, some other boron carriers were used to deliver polyhedral boranes into tumor cells. One of the most interesting and new direction is developments in the BNCT driven by nanotechnology [142-147]. This subject will not be discussed here since a special chapter is planned in this book. Carboranylquinazolines [148], carboranyl aminoalcohols [149], carboranyl-a-acyloxy-amides [150], carboranyl glycophosphonates [151], conjugates of icosahedral dicarboranes with cobalt bis(dicarbollide) [152], and platinum complexes containing carborane [153] have been obtained as potential candidates for BNCT. 

J. Yoo, Y. Do. Synthesis of stable platinum complexes containing carborane in a carrier group for potential BNCT agents. Dalton Trans., 2009,4978-4986. 

---