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• W1986135420 endingPage "1797" @default.
• W1986135420 startingPage "1790" @default.
• W1986135420 abstract "A new polydentate ligand, namely 2-[(5-hydroxy-1-phenyl-3-methylpyrazol-4-yl)(5-oxo-1,5-dihydro-4-phenyl-2-methylpyrazol-4-ylidene)methyl]benzoic acid (H2QBz), has been prepared and characterized. The structure of the ligand H2QBz consists of discrete molecules linked to one another by an extensive H-bonding network. The reactivity of H2QBz towards [R3Sn]2O (R = Ph or Bun) and RnSnCl4 − n (R = Me, Bun, But, Ph, n = 2; R = Me, n = 3) has been investigated. Mono- and di-nuclear derivatives have been obtained depending on the nature of the starting acceptor and reaction conditions. [Ph3Sn(HQBz)] 1 contains the HQBz ligand coordinated to Ph3Sn through the deprotonated carboxylic group. In the complex [(H2O)Ph3Sn(HQBz)] 2, obtained by hydration of 1, the coordination sphere of tin is completed by bonding to a water molecule. The compounds [(R3Sn)2(QBz)] (R = Me, 3; Bun, 4) contain the dianionic ligand bridged to two triorganotin(IV) fragments. In solution the mononuclear triorganotin(IV) aqua complexes [(H2O)R3Sn(HQBz)] (R = Ph, 2; Bun, 5) loose the molecule of water and slowly decompose, yielding the free ligand and the R3SnOH species. The diorganotin(IV) derivatives [R2Sn(QBz)]2 (R = Me, 6; But, 7; Bun, 8; Ph, 9) are dinuclear both in the solid state and in solution. In the structure of [Me2Sn(QBz)]26 both acidic H atoms of the ligand are substituted by tin: a dimeric centrosymmetric structure forms, involving two [QBz]2− ligands acting as bridges between two tin atoms through both pyrazolone and benzoate moieties. Sn centers in the dimer are five-coordinated in a strongly distorted trigonal bypiramidal environment." @default.
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• W1986135420 date "2001-01-01" @default.
• W1986135420 modified "2023-10-03" @default.
• W1986135420 title "The interaction of organotin(IV) acceptors with a benzoic acid containing two pyrazolone groups †" @default.
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• W1986135420 doi "https://doi.org/10.1039/b100988p" @default.
• W1986135420 hasPublicationYear "2001" @default.
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