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RESEARCH PRODUCT

Synthesis and characterization of triphenyltin(IV) 5-[(E)-2-(aryl)-1-diazenyl]-2-hydroxybenzoates. Crystal and molecular structures of Ph3Sn{O2CC6H3-p-OH[NN(C6H4-4-CH3)]} and the 2,2′-bipyridine adduct Ph3Sn{O2CC6H3-p-OH[NN(C6H4-2-CH3)]}OH2·C10H8N2

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Abstract Triphenyltin 5-[(E)-2-(4-methylphenyl)-1-diazenyl]-2-hydroxybenzoate, Ph3SnL2H, has been prepared and characterized, its structure determined by X-ray crystallography, and the structure compared with those of its homologues. Two polymorphs were isolated from the same crystallization attempt. The reactivity of tetrahedral Ph3SnL1H (L1H = 5-[(E)-2-(2-methylphenyl)-1-diazenyl]-2-hydroxybenzoate) towards 2,2′-bipyridine (bipy) has been investigated to ascertain the ability of bipy to coordinate to the Sn-complex and the resultant changes in the molecular architecture. The crystal structure of the product revealed that the bipy moiety does not coordinate to the Sn atom, but forms a cyclic tetrameric adduct of formula [Ph3SnL1H(H2O)]2 · bipy2 through hydrogen bonding between the water ligand of Ph3SnL1H(H2O) and the bipy N atoms. The interpretation of this structure was further enhanced by IR, NMR (1H, 13C, 119Sn) and 119mSn Mossbauer experiments.