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Group VI donors

Group VI Donors. [Ru(NH3)5S02] undergoes a one-electron electrochemical oxidation the SO2 ligand is then hydrolysed in the Ru product. Relative to aqueous N07, the n.m.r. chemical shift of bound nitrate in [RuCNOXNO,),- [Pg.307]

A number of thioformate complexes have been synthesized from the insertion of CS2 into Ru—H bonds. For example, HRu(C0)(PPh3)2(02CCF3) and HaRu [Pg.307]

Nishimura, O. Yumoto, K. Tsuneda, and H. Mori, Bull. Chem. Soc., Japan, 1975, 48, 2603. [Pg.307]

Group VI Donors. O-Donor ligands, cis- and trans-isomers of ruthenium(in) trifluoroacetylacetonates (16) have been sepated by chromatography and [Pg.349]

Earley and H. Razani, Inorg. Nuclear Chem. Letters, 1973, 9, 331. [Pg.349]

An extensive study has been made of the polarographic behaviour of a variety of /3-diketonato-complexes of the type [RuLj]. In general they exhibit uncomplicated, reversible, one-electron transfer reactions  [Pg.350]

S-Donor ligands. Various new complexes of thiourea and substituted thioureas have been prepared. Whereas RUCI3 and methanolic thiourea or allylthiourea yielded black crystals of [RuL5Cl]Cl, phenyl-, naphthyl-, or ditolyl-thiourea gave grey [RuL4Cl2]Cl, and diphenylthiourea produced [RUL3CI3]. I.r. spectra indicated Ru—S bonds in all the complexes except the allylthiourea species for which a Ru—bond was indicated. In view of the paucity of well-characterized sulphamato-complexes, the preparation [equation (11)] of a [Pg.351]

Similar variable-temperature n.m.r. investigations have been made of the [Pg.351]

Platinum(O).—Group VI Donors. An isotopic i.r. study has been carried out [Pg.419]

Oxidation of the corresponding tris(dithiocarbamato)Mm complexes with BF3 in dry toluene has given complexes of type (15 M = Ru or Rh).88 Both compounds show the characteristic shift of v(C=N) on oxidation to higher frequency near [Pg.343]

1500 cm 1 previously observed in the corresponding Felv complex. Their unexpected diamagnetism in the solid state may be due to pairing of electron spins via association, which is supported by molecular weight determinations in chloroform. [Pg.343]


Lewis Base complexes—Group VI donor atoms ... [Pg.460]

Group VI Donors. Oxygen donor ligands. A series of unsymmetrical tris-(P-diketonato)M " complexes (17) has been investigated in order to establish CIS—trans isomer distributions, and relative rates of isomerization. Included in this study was the preparation and separation of the geometric isomers of [Ru(tfac)3] and [Ru(bzac)3] (tfac = trifluoroacetylacetone, bzac = benzoyl-acetylacetone). In weakly polar media, the trans-isomer of [Ru(tfac)3] was found to be more stable, whereas the isomer distribution of similar complexes with R, R = alkyl or Ph, is statistical. ... [Pg.364]

Group VI Donors. Oxygen donor ligands. A new and more successful preparation of CIS- and tra s-K[Rh(ox)2(H20)2] has been reported, via the chromatographic separation of the acid hydrolysis products from Kj[Rh(ox)3],4j-H20. The u.v.-visible spectra of these complexes cast doubts on the purity of the samples previously described. An interesting feature of Rh -oxalate chemistry is the assertion that K3[Rh(ox)3],4 H20 actually exists as the partly unidentate K6[Rh(ox)3][Rh(ox)2(C204H)(OH)],8H20. This has now... [Pg.384]

Group VI Donors. Oxygen and sulphur donor ligands. Oxidative addition of tetrachloro-l,2-benzoquinone to rrans-[Ir(CO)Cl(PR3)2] (R3 — Ph3 or Ph2Me) has been shown to give the Ir ° products [Ir(02CgCl4)(C0)Cl(PR3)2], whose structures (45) were confirmed from far-i.r. and H n.m.r. data. Comparison... [Pg.397]

Group VI Donors. Oxygen and mixed oxygen-nitrogen donor ligands. A more convenient synthesis has been reported for the chiral complex [Pd(tfacCam)2] (52), involving the reaction of Ba(tfacCam)2 with PdCl2- ... [Pg.405]

Group VI Donors. The thio-oxinato-complex Ag(C9HgNS)2 (54 M = Ag) has been prepared, and its N and S co-ordination confirmed from i.r. data. Solution and powder e.s.r. studies of the compound isolated from the reaction between Ag acetate and the NN-di-n-butyldiselenocarbamate anion confirm that it is a Ag" complex of structure (96). A subsequent single-crystal e.s.r. [Pg.442]

Table 49.357 It was assumed that in all of these cases bonding was primarily through the Group VI donor atom with minimal chelation through the carboxyl groups. This was supported by the apparent absence of a silver complex for X = CH2. Table 49.357 It was assumed that in all of these cases bonding was primarily through the Group VI donor atom with minimal chelation through the carboxyl groups. This was supported by the apparent absence of a silver complex for X = CH2.
Complexes of Palladium(IV) Containing Group VI Donor Atoms 1124... [Pg.1099]

A number of other Pdlv species with group VI donors have been prepared as shown in equations (18)-(23). [Pg.1124]

The chapter has been sectioned according to the paired combinations of N—O, N—S, S—O or Se containing bidentates. Another Group VI donor element, tellurium, has not been included since in only one example has this element formed part of a mixed donor bidentate. This is the reported interaction of di(o-aminophenyl)ditelluride (2) with Cu1 and Cu11, where N—Te bidentate behaviour was concluded for the tetrahedral Cu (N—Te)2 chelate.1... [Pg.794]

Group VI Donors. Stable bicarbonato complexes of the type [M(0C02H)(C0)-(PPh3)2] (M = Rh or Ir) have been isolated using the C02-fixation reaction (32).134 These diamagnetic species were tentatively assigned a unidentate bicarbonate coordination, although neither exhibited an O—H stretch in the i.r. [Pg.372]

Group VI Donors. The synthesis of complexes of some cyclic tertiary amino-acids with Pd or Pt has been reported (equation ll).36 The complexes are chelated via N and O and have high stability constants, K = 108—1011. Complexes of Pt (Pd, Cu) with 3,3 -diamino-4,4 -dihydroxydiphenylsulphone have been obtained (see p. 387).38... [Pg.405]

Group VI Donors. Sulphinato-complexes of Au, Ag, and Cu have been synthesized (equation 46).205 I.r. studies indicate that the complex [(Ph3P)Au(S02Ph)] is S-bonded, unlike the Ag and Cu complexes which are O-bonded. Moreover, the Cu and Au complexes are readily oxidized by molecular oxygen (Scheme 4) to sulphonate complexes, and it was postulated that an equilibrium between S-bonded and O-... [Pg.431]


See other pages where Group VI donors is mentioned: [Pg.183]    [Pg.190]    [Pg.353]    [Pg.378]    [Pg.393]    [Pg.424]    [Pg.434]    [Pg.440]    [Pg.446]    [Pg.1116]    [Pg.662]    [Pg.332]    [Pg.341]    [Pg.343]    [Pg.347]    [Pg.362]    [Pg.364]    [Pg.376]    [Pg.379]   
See also in sourсe #XX -- [ Pg.524 ]

See also in sourсe #XX -- [ Pg.4 , Pg.524 ]




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