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| 2. |
- Foreman, Mark, 1973, et al.
(författare)
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New organophosphorus-sulfur heterocycles
- 1997
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Ingår i: Journal of the Chemical Society-Dalton Transactions. - 0300-9246. ; :8, s. 1347-1350
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Tidskriftsartikel (refereegranskat)abstract
- The synthesis of 2,4-(naphthalene-1,8-diyl)-1,3,2,4-dithiadiphosphetane 2,4-disulfides from P4S10 and the appropriate naphthalene compound has been accomplished. The reactions of naphthalene-1,8-diyl-1,3,2,4-dithiadiphosphetane 2,4-disulfide with methanol and 3,5-di-tert-butylcatechol have been performed. The crystal structure of a naphthalene relative of Lawesson's reagent has been determined.
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| 3. |
- Foreman, Mark, 1973, et al.
(författare)
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Novel 1,2-thiaphosphetanes from diferrocenyldithiadiphosphetane disulfide
- 1997
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Ingår i: Chemical Communications. - : Royal Society of Chemistry (RSC). - 1364-548X .- 1359-7345. ; :9, s. 855-856
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Tidskriftsartikel (refereegranskat)abstract
- Diferrocenyldithiadiphosphetane disulfide reacts with bicyclic dienes to form four- and six-membered PS containing rings which are crystallographically characterised.
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| 4. |
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| 5. |
- Foreman, Mark, 1973, et al.
(författare)
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Reactions of dithiadiphosphetane disulfides with organonitrogen compounds
- 1999
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Ingår i: Journal of the Chemical Society-Dalton Transactions. - 0300-9246. ; :19, s. 3419-3430
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Tidskriftsartikel (refereegranskat)abstract
- The reactions of (RP)-P-1(S)S2P(S)R-1 (R-1 = ferrocenyl) with a range of organic systems containing unsaturated C-N linkages have been studied. Thus treatment with dimethylcyanamide gives a 1,3,5,4-thiazaphosphorine 4-sulfide, whereas reaction with dicarbodiimides gives a thiazadiphosphetane. Furthermore reaction of diphenylurea gives a phenylthiazaphosphetane. Mechanisms for the reactions are proposed and the crystal structures of three selected examples are reported and discussed with reference to the steric effects of the reactants. These reactions provide a new entry into C-P-S-N heterocycles. Cyclic voltammetry studies on a range of ferrocenyl substituted heterocycles were also made.
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| 6. |
- Foreman, Mark, 1973, et al.
(författare)
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The preparation of a solubilized form of Lawessons reagent and its thionation reactions
- 1999
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Ingår i: Heteroatom Chemistry. - 1098-1071 .- 1042-7163. ; 10:7, s. 651-657
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Tidskriftsartikel (refereegranskat)abstract
- 2-tert-Butylanisole and P4S10 react together to give 2,4-bis (3-tbutyl-4-methoxyphenyl) 1,3, 2, 4-dithiadiphosphetane 2, 4-disulfide (LR*) which was characterized by X-ray crystallography. Comparative thionation reactions of LR* and a range of P-S compounds were investigated. If was found that LR* in many cases, gives better yields of thionated complexes than Lawessons Reagent when the reactions are performed at room temperature. (C) 1999 John Wiley & Sons, Inc.
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| 7. |
- Foreman, Mark, 1973, et al.
(författare)
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The reaction of dithiadiphosphetane disulfides with dienes, alkenes and thioaldehydes
- 1999
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Ingår i: Journal of the Chemical Society-Dalton Transactions. - 0300-9246. ; :7, s. 1175-1184
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Tidskriftsartikel (refereegranskat)abstract
- Ferrocenyl dithiadiphosphetane disulfide behaves as RPS2 in simple cycloaddition reactions. Reactions with norbornadiene, norbornene and hexamethyl dewar benzene ail give rise to fused 4-membered C2PS ring compounds. Reaction with 2,3-dimethylbutadiene gave a simple Diels-Alder adduct which undergoes further reaction with BuLi and RX to yield FcP(S)(SR)(C6H9) (R = CH2Ph, o-MeC6H4CH2, 2,4-dinitrophenyl). A trithiaphosphorinane was obtained when Fc(2)P(2)S(4) was reacted with benzaldehyde or trimethylacetaldehyde. Reaction of Fc(2)P(2)S(4) with PhCH2N = CHPh gave a dithiophospholane and a thiazadiphosphetane disulfide. The new compounds have been characterised spectroscopically with illustrative examples having been studied by X-ray crystallography.
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| 8. |
- Tyumentsev, Mikhail S, 1988, et al.
(författare)
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Coordination of Trivalent Lanthanides with Bismalonamide Ligands: Implications for Liquid-Liquid Extraction
- 2017
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Ingår i: European Journal of Inorganic Chemistry. - : Wiley. - 1434-1948 .- 1099-0682. ; 2017:37, s. 4285-4298
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Tidskriftsartikel (refereegranskat)abstract
- The complexation of the bismalonamide ligand 2,2'[1,2-phenylenebis(methylene)] bis(N, N, N', N'-tetraethylmalonamide) (L), bearing two C-alkylated N, N, N', N'-tetraethylmalonamide groups, onto an ortho-xylylene [C6H4(CH2)(2)] platform with trivalent lanthanides was investigated, both in solid and solution states. The crystal structures [Nd-2(NO3)(6)L-2]center dot(CH3CN)(3) (2), [Nd-2(NO3)(4)L-2]center dot[Nd(NO3)(5)]center dot(CH3CN) 1.5 (3), Ce(NO3)(3)L-2 (4), and [NdL2]center dot(ClO4)(3)center dot C2H5OH (5) were analyzed by single-crystal X-ray diffraction. The ortho-bismalonamide (L) is tetradentate in structures 2, 3, and 5 and bidentate in 4 only. It was found that structures 2 and 3 are composed of dimeric species. According to electrospray-ionization mass spectrometry, the dimers are prevailing in acetonitrile solutions. The polydentate coordination of the ortho-bismalonamide (L) with trivalent lanthanides suggests that an entropy effect favors liquid-liquid extraction of metal ions with this type of ligand.
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