Complexes of bridged diphosphinothioyl chelates

Abstract

A series of bridged diphosphinothioyl bidentate ligands has been synthesized and several have been found to form stable complexes with a number of "class b" metal halides. The infrared spectra indicate that the ligands form six-membered ring chelates by coordination ziia both thiophosphoryl donor sites. The sulfur-bridged ligands undergo cleavage to yield phosphorodithioate complexes.

Synthesis and spectroscopic characterization of ruthenium and osmium complexes with sterically hindering ligands. 3. Tris complexes with methyl- and dimethyl-substituted 2,2'-bipyridine and 1,10-phenanthroline

“…1.3 N solution of methyllithium prepared by the method of Gilman et al 8 The orange mixture was refluxed with stirring until a deep red solution was obtained and then stirred at room temperature for 4 h. The mixture was added to a slush of 300 g of ice and 60 mL of 12 M HC1. After being warmed to room temperature, the solution (7) (a) Bryant, G. M.; Ferguson, J. E.; Powell, . K. J. Aust.…”

Reactions of Sodium Bis(N-aryliminophosphoranyl)alkanides with Halide-Bridged Platinum(II) and Palladium(II) Phosphine Dimers Affording Four-Membered M−N−P−C Metallacycles and Orthometalated Platinum(II) and Palladium(II) Complexes

“…The coordination chemistry of phosphorus-containing monoanions I (Chart ), that are structurally related to acetylacetonate ( II ) has been the subject of several studies these last decades. − The lithium or sodium compounds of I , which are easily obtained via deprotonation reactions of their neutral derivatives [CH 2 (PR 2 X) 2 ] by LDA, NaH, BuLi, or other strong bases, are convenient precursors for transmetalation reactions.…”

“…Such a coordination mode was rather peculiar since the closely related bis(chalcogenophosphoranyl)methanide ligands [CH(PR 2 X)(PR 2 Y)] - (X, Y = O, S, Se) coordinate exclusively as X, Y chelates to Rh and Ir,2a but C, X and X, Y coordination was observed for these ligands with Pt 3a,b and Au …”

Ligating properties of tertiary phosphine/arsine sulphides or selenides, part V. Complexes of ditertiaryphosphine disulphides and diselenides with platinum(II) and platinum(IV) halides

“…In all categories, the ligand is acting as a bridge between the two metal ions excepting structure (4) in which the ligand is unidentate. The bridging behaviour of the ligand is evident because there is no increase in the number of methylene bending bands after formation of the complex.…”

“…Platinum(ll) chloride has also been reported (4) to form adducts of the type PtCI2 • L with ditertiaryphosphine disulphides, where L = Ph2 P(S)CH2 P(S)Ph2 and Ph2 P(S)CH2 P(S)Me2. In the present investigations we have prepared 1 : 1, 1 : 2 or 3 : 2 (metal: ligand) adducts of platinum(IV) and platinum(ll) chloride or bromide with 1,2-ethylene-bisdiphenylphosphine sulphide or selenide (EDPS or EDPSe), 1,3-propylene-bisdiphenylphosphine sulphide or selenide (PDPS or PDPSe), 1,4-butylene-bisdiphenylsulphide or selenide (BDPS or BDPSe) and 1,6-hexamethylene-bisdiphenylphosphine selenide (HDPSe).…”