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- W2085986681 abstract "Monomeric, five-coordinate bis(diethyldithiocarbamato)M(II)(trialkylphosphine) complexes, 1 (M = Zn, alkyl = Me), 2 (M = Zn, alkyl = Et), 3 (M = Cd, alkyl = Me), and 4 (M = Cd, alkyl = Et) have been synthesized by addition of trialkylphosphine ligands to toluene solutions of bis(diethyldithiocarbamato)M(II) (M = Zn, and Cd). The bidentate ligand, 1,2-bis(diethylphosphino)ethane (DEPE) reacted with bis(diethyldithiocarbamato)M(II) (M = Zn, Cd) and a 1:1 mixture of [(Et2NCS2)2Zn]2: [(Et2NCS2)2Cd]2 in toluene to form five-coordinate, dinuclear DEPE-bridged complexes, [(Et2NCS2M]2(μ-DEPE), 5 (M = Zn), 6 (M = Cd) and 7 [(Et2NCS2)2Zn](μ-Et2PCH2CH2PEt2)[Cd(Et2NCS2)2], respectively. The composition and structure of all compounds was confirmed by elemental analyses, infra-red spectroscopy, 1H, 13C{1H} and 31P{1H} nuclear magnetic resonance (NMR) spectroscopy and in selected cases by X-ray crystallography. Variable temperature 31P{1H} and 113Cd{1H} NMR showed that these complexes undergo a dynamic exchange process at room temperature involving MP bond cleavage with activation parameters of ΔH‡ = 9 kcal mol−1 and ΔS° = −7 eu as determined by two independent measurements based on simulation of variable temperature 31P{1H} and 113Cd{1H} NMR data for 4. The solid-state structures of (Et2NCS2)2ZnPMe3 (1) and (Et2NCS2)CdPEt3 (4) have been determined by single-crystal X-ray diffraction. The single crystal X-ray diffraction structure of [(Et2NCS2)2Zn]2(μ-DEPE) · 2C7H8 (5) has been reported earlier and confirmed the dinuclear nature showing that the two zinc units were bridged by the DEPE ligand and not chelated. Thermogravimetric analysis (TGA) of compounds 1–3 showed that the PR3 ligands dissociated prior to thermal decomposition. However, compound 4 exhibited a single weight loss to give crystalline CdS as determined by X-ray powder diffraction, electron diffraction and transmission electron microscopy. The homobimetallic species, 5 and 6, also decomposed to give ZnS and CdS, respectively while the heterobimetallic species, 7, thermally decomposed to give crystalline Zn0.5Cd0.5S according to X-ray powder diffraction data." @default.
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- W2085986681 date "1994-01-01" @default.
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- W2085986681 title "Synthesis and characterization of single-source molecular precursors to binary metal sulphides: bis(diethyldithiocarbamato)M(II)trialkylphosphine (M = Zn and Cd) adducts" @default.
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- W2085986681 doi "https://doi.org/10.1016/s0277-5387(00)83429-4" @default.
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