140 research outputs found

    X-ray crystallography, an important cog in the materials science machine

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    X-ray crystallography, an important cog in the materials science machin

    Tetra-n-butylammonium bromide: a redetermination at 150 K addressing the merohedral twinning

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    Tetra-n-butylammonium bromide: a redetermination at 150 K addressing the merohedral twinnin

    Synthesis and solid state structure of pyridyl diboroxines linked by a chiral spacer analogous to Troger's base

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    Pyridyl-assisted templating of phenyl boronic acid has been utilised to link two remote boroxines via a chiral spacer. The chiral spacer is a carbocyclic analogue of Tröger's base and contains a unique chiral cavity, and the flanking boroxine units have been shown, by single crystal X-ray analysis, to extend the size and shape of this cavity

    These crystals will make your crystallographer happy

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    These crystals will make your crystallographer happ

    Lithiation of η6-fluorobenzenetricarbonylchromium(0) and reaction with dialkyl disulfides: synthesis of η6-1,2-bis- and 1,2,3-tris-alkylsulfanylbenzenetricarbonylchromium(0) complexes

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    Directed lithiation of η6-fluorobenzenetricarbonylchromium(0) and reaction with dialkyl disulfides affords η6-1,2-bis-alkylsulfanylbenzenetricarbonylchromium(0) complexes by electrophilic addition of an alkylthio group at C-2 of the benzene ring, and subsequent SNAr reaction with displacement of fluoride by the alkanethiolate generated in the first step. 1,2,3-tris-Alkylsulfanylbenzene complexes are formed as by-products. The structures of four of the new complexes have been confirmed by X-ray crystallography, one using synchrotron radiation

    Re-investigating the structures of [Cu(NO3)2(en)2] and [Cu(NO3)2(pn)2]: tales of twinning and a reversible phase change

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    Re-investigating the structures of [Cu(NO3)2(en)2] and [Cu(NO3)2(pn)2]: tales of twinning and a reversible phase chang

    Organocatalytic asymmetric domino Michael-Henry reaction for the synthesis of substituted bicyclo[3.2.1]octan-2-ones

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    The first organocatalytic asymmetric reaction between 1,4-cyclohexanedione and nitroalkenes have been studied, affording bicyclo[3.2.1]octane derivatives containing four continuous stereogenic centres. The products were obtained through a domino Michael-Henry process as a single diastereoisomer with excellent enantioselectivities

    The first enantiomerically pure thiadiazol-3-one 1-oxide and thiatriaza-indene 3-oxide systems chiral at the sulfur atom

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    The first synthesis of an enantiomerically pure C2 symmetric benzothiadiazole 2-oxide is described along with the first synthesis of an enantiomerically thiadiazol-3-one 1-oxide and a thiatriaza-indene 3-oxide system both chiral at the sulfur atom. Excellent levels of diastereoselectivity were observed in the SO installation step, that is, the reaction of the prerequisite bis-amines with thionyl chloride at ambient temperature
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