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• W3003398981 abstract "The red-brown [(WSCl4)2{μ-RS(CH2)2SR}] (R = Me, Ph, iPr) and [(WSCl4)2{μ-MeS(CH2)3SMe}] have been made by reaction of WSCl4 with the thioether in a 2 : 1 molar ratio, in anhydrous CH2Cl2 solution, and characterised by microanalysis, IR, UV/Vis and 1H NMR spectroscopy. The X-ray structures of the four dithioether complexes reveal square pyramidal WSCl4 units and bridging dithioethers with W[double bond, length as m-dash]S trans to thioether sulfur. Paramagnetic W(v) complexes, [WSCl3{RS(CH2)2SR}] (R = Me, iPr), have been made similarly using a 1 : ≥1 ratio of reactants or longer reaction times. The W(vi) complexes, [WSCl4(SMe2)] and [WSCl4(SeMe2)], are also described. Analogous complexes of WOCl4, [(WOCl4)2{RS(CH2)2SR}] (R = Ph, iPr), have been made similarly from WOCl4, but reactions using MeS(CH2)nSMe (n = 2, 3) led to reduction to W(v), forming [WOCl3{MeS(CH2)nSMe], both of which were identified crystallographically. Curiously, they are geometric isomers: [WOCl3{MeS(CH2)3SMe}] has the dithioether trans Cl/Cl whereas in [WOCl3{MeS(CH2)2SMe}] it is trans O/Cl. Remarkably, low pressure chemical vapour deposition (CVD) experiments using the dinuclear W(vi) species, [(WSCl4)2{iPrS(CH2)2SiPr}], as a single source precursor produced thin films of 4H-WS2, identified by grazing incidence X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy and Raman spectroscopy; the tungsten thiochloride complex is the first single source low pressure CVD precursor for WS2. In contrast, the mononuclear W(v) complex, [WSCl3{iPrS(CH2)2SiPr}], does not deposit WS2 under similar conditions." @default.
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• W3003398981 date "2020-01-01" @default.
• W3003398981 modified "2023-10-10" @default.
• W3003398981 title "Thioether complexes of WSCl4, WOCl4 and WSCl3 and evaluation of thiochloride complexes as CVD precursors for WS2 thin films" @default.
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• W3003398981 doi "https://doi.org/10.1039/d0dt00068j" @default.
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