Benzonitrile, platinum complex

C7H4N, Benzonitrile platinum complex, 26 345 ruthenium (II) complexes, 26 70-72 CiH , Benzene, methyl-cobalt complex, 26 309 manganese complex, 26 172... 

Benzonitrile, platinum complex, 26 345 ruthenium(II) complex, 26 70 Benzo(/i]quinoline, ruthenium complex,... 

Infrared and Raman spectra are useful, of course, in determining the symmetry of poly(nitrile) complexes. An example is dichlorobis(benzonitrile)platinum, a versatile starting material in platinum chemistry. There is a dispute in the literature as to whether it has a cis or trans configuration. (There is a general agreement that the corresponding Pd complex is trans.) It has recently been shown by X-ray structure analysis that both cis and trans complexes exist, and their vibrational spectra have been discussed.21... 

Pinacolone, o-(diphenylphosphino)benzoyl-coordination chemistry, 401 Piperidine, IV-hydroxy-metal complexes, 797 pA a values azole ligands, 77 Plant roots amino acids, 962 carboxylic acids, 962 Plastocyanin copper binding site, 557 copper(II) complexes, 772 copper(II) site in, 770 Platinum, dichlorobis(benzonitrile)-IR spectrum, 264 Platinum, cis-dichlorodianunine-antitumor activity, 34, 979 Platinum, ethylenebis(triphenylphosphine)-reactions with 5,6-dimethyl-2,l,3-benzothiadiazole, 194 Platinum blue formation, 265 Platinum complexes acetylacetone reactions, 380 amides, 491 amidines... 

Bis(benzonitrile)dichloropalladiuin was first prepared in 1938 by the reaction of palladium(II) chloride with benzonitrile at 100 °C, and similar procedures have been described elsewhere. The analogous platinum complex has been synthesized in a related manner it has also been prepared, although in much lower yield, from potassium tetrachloroplatinatefll). The infrared spectra of both bisfbenzonitrile) compounds have been described, and their NMR data have been reported CNMR parameters have been reported for the platinum species. ... 

N2Br2RuC22H22, Ruthenium(II), bis(benzonitrile)dibromo(q -1,5-cyclooctadiene)-, 26 71 N2C2HB, 1,2-Ethanediamine, chromium complex, resolution of, 26 24, 27, 28 platinum complexes, 27 314, 315... 

In a recent publication by Miry and coworkers [93], the cobalt(II) complex of dibenzotetraaza[14]annulene was anodi-cally polymerized from a benzonitrile solution onto carbon and platinum electrodes. 

Tetrakis(triethylphosphine)platinum(0) is extremely air sensitive and readily soluble in saturated aliphatic hydrocarbons. The complex can be stored under dry nitrogen in a freezer (-35°) for several months. The complex readily loses one of the coordinated phosphine molecules to give Pt(PEt3)36 (dissociation constant (K ) in heptane is 3.0 X 10" ). The H NMR spectrum measured in benzene-d6 shows two multiplets at 5 1.56 (CH2) and 1.07 ppm (CH3). Tetrakis-(triethylphosphine)platinum(O) is a strong nucleophile and reacts readily with chlorobenzene and benzonitrile to give a-phenyl complexes PtX(Ph)(PEt3)2 (X = Cl, CN).7 Oxidative addition of EtOH affords [PtH(PEt3)3] +. 

The complex PtCl2 is an extremely useful precursor in platinum chemistry.10b The labile benzonitrile ligands can be easily and quantatively replaced by neutral ligands (e.g., amines, phosphines, etc.). On the other hand, the chloride ligands can be substituted by nucleophiles of which an example is given below. 

The trinuclear complex trans-Pt[Mo(CO)3( /5-C5H5)]2(PhCN)2 is prepared by the reaction of two equivalents of sodium carbonylmetallate with the square planar platinum(II) complex PtCl2(PhCN)2.3 Both cis and trans isomers afford the trans trinuclear chain complex. The lability of the benzonitrile ligand in the latter can be used advantageously for cluster synthesis this will be described in the next section. 

Bis[di-r-butylphosphano]telIurium reacted with platinum dichloride in toluene and with bis[benzonitrile]dichloroplatinum in dichloromethane to produce yellow crystals of the expected complex. ... 

In the other study [24], complexes containing heterocycles of a new type, namely, 2,3a-disubstituted 5,6-dihydro-3a//-[l,3]oxazolo[3,2-fe][l,2,4]oxadiazoles (6, Scheme 13.5), were prepared via the intermolecular platinum(II)-mediated DCA between coordinated nitriles in fran.y/aT-[PtCl2(R CN)2] and the oxazoline A-oxide C (Me)2CH20C(R )=N +(0 )(C -N ). With the exception of benzonitrile species, cycloaddition of oxazoline A-oxides to the platinum(II)-ligated nitriles proceeds diastereoselectively giving mixtures of enantiomers. The heterocyclic ligands in 6 were liberated by treatment with excess ethane-1,2-diamine [24]. 

Dichloro(l,5-cyclooctadiene)platinum(II) may be prepared from hexa-chloroplatinic acid, or by heating bis(benzonitrile)dichloroplatinum(II) in 1,5-cyclooctadiene at 14S°C for 5 min, or from potassium tetra-chloroplatinate(2-). The complex [PtCl2(CgHi2)] has a very low solubility in the reaction mixture and must be finely ground to ensure complete reaction. The olefins 1,5-cyclooctadiene, bicyclo[2.2.1]hept-2-ene(2-norbomeneX and 1,3,5,7-cyclooctatetraene and all solvents should be dried and freshly distilled under nitrogen. In particular, peroxide-free diethyl ether is first dried over sodium wire and then distilled under nitrogen from sodium-benzophenone. 

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