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The Reactivity of Diphenyllead(IV) Dichloride with Dissymmetric Thiosemicarbazone Ligands: Obtaining Monomers, Coordination Polymers, and an Organoplumboxane
Author(s) -
Sesmero Ester,
Calatayud David G.,
Perles Josefina,
LópezTorres Elena,
Mendiola M. Antonia
Publication year - 2016
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201501245
Subject(s) - chemistry , semicarbazone , ligand (biochemistry) , dichloromethane , medicinal chemistry , reactivity (psychology) , organometallic chemistry , monomer , crystal structure , stereochemistry , polymer chemistry , polymer , crystallography , organic chemistry , medicine , biochemistry , receptor , alternative medicine , pathology , solvent
Abstract The reaction of PbPh 2 Cl 2 with two dissymmetric thiosemicarbazone ligands containing diacetyl 4‐methyl‐3‐thiosemicarbazone and hydrazonepyridine or hydrazonequinoline arms led to four new mononuclear complexes, [PbPh 2 (L)] ( 1 and 3 ) and [PbPh 2 Cl(HL)] ( 2 and 4 ). Reactions with the hydrazonequinoline ligand strongly depend on the reaction conditions and several unexpected compounds were isolated. At room temperature, in addition to complex 4 , the polymeric compound [PbPh 2 Cl 2 CH 3 OH] n ( 5 ) was isolated, whereas under heating at reflux a symmetrization took place and a polymer containing diacetyl bis(4‐methyl‐3‐thiosemicarbazone), [PbPh 2 Cl 2 (H 2 ATSM)] n ( 6 ) was obtained. When PbPh 2 Cl 2 was heated at reflux in wet dichloromethane with LiOH · H 2 O, the tetranuclear organoplumboxane [Pb 4 Ph 8 Cl 4 O 2 ] ( 7 ) was isolated, which, to the best of our knowledge, is the first organoplumboxane to be crystallographically characterized. All the compounds were thoroughly characterized, including by 207 Pb NMR and single‐crystal XRD. In addition, the hydrazonequinoline ligand has demonstrated its potential application as a chromophoric probe in the visible region for organolead(IV) species.