Proton-ligand stability constants of substituted 2-aminophenols

Vartak, D.G.; Menon, Navya

doi:10.1016/0022-1902(69)80188-0

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“…Salicylaldehyde and their metal derivatives are well established [1][2][3]. More useful organic reagents having the properties of salicylaldehyde together with other 0022-328X/$ -see front matter Ó 2004 Elsevier B.V. All rights reserved.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of tributyltin(IV) complexes of 2-[(E)-2-(3-formyl-4-hydroxyphenyl)-1-diazenyl]benzoic acid and 4-[((E)-1-{2-hydroxy-5-[(E)-2-(2-carboxyphenyl)-1-diazenyl]phenyl}methylidene)amino]aryls – crystal structures of polymeric (Bu3Sn[O2CC6H4{NN(C6H3-4-OH-5-CHO)}-o])n and (Bu3Sn[O2CC6H4{NN(C6H3-4-OH(C(H)NC6H4Cl-4))}-o])n – toxicity studies on the second instar of Aedes aegypti mosquito larvae

Baul

Singh

Song

et al. 2004

Journal of Organometallic Chemistry

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The tri-n-butyltin(IV) complexes of 2-[(E)-2-(3-formyl-4-hydroxyphenyl)-1-diazenyl]benzoic acid and 4-[((E)-1-{2-hydroxy-5-[(E)-2-(2-carboxyphenyl)-1-diazenyl]phenyl}methylidene)amino]aryls (aryls = 4-CH 3 , 4-Br, 4-Cl, 4-OCH 3 ) have been synthesized and characterized by 1 H, 13 C, 119 Sn NMR, IR and 119m Sn Mö ssbauer spectroscopic techniques in combination with elemental analysis. The crystal structures of two compounds, (Bu 3 Sn[O 2 CC 6 H 4 {N@N(C 6 H 3 -4-OH-5-CHO)}-o]) n and (Bu 3 Sn[O 2 CC 6 H 4 -{N@N(C 6 H 3 -4-OH(C(H)@NC 6 H 4 Cl-4))}-o]) n , are reported.The crystallographic and 119 Sn Mö ssbauer data both indicate that the tributyltin complexes form single-stranded polymeric structures in which the carboxylate O atoms of each aryl ligand bridge two Sn atoms. The Sn atoms have a slighly distorted trigonal bipyramidal coordination geometry with equatorial butyl groups and carboxylate O atoms occupying axial positions. The 119 Sn NMR spectroscopic data and the 1 J( 13 C-119/117 Sn) coupling constant indicate a tetrahedral coordination geometry in non-coordinating solvents. The results of a toxicity study of a tributyltin compound on the second larval instar of Aedes aegypti mosquito larvae are reported.

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