Original scientific paper

Synthesis and Characterization of Metallocyclic Complexes of Palladium(II) with Monoalkyl (α-Anilino-N-benzyl)phosphonates

Ljerka Tušek-Božić ; Ruđer Bošković Institute, Bijenička c. 54, 10002 Zagreb, Croatia
Martina D'Alpaos ; Servizio di Spettrometria di Massa, Area di Ricerca del CNR, Corso Stati Uniti 4, 35100 Padova, Italy
Manda Ćurić ; Ruđer Bošković Institute, Bijenička c. 54, 10002 Zagreb, Croatia
Antonin Lyčka ; Research Institute for Organic Syntheses, 53218 Pardubice-Rybitvi, Czech Republic

Abstract

The synthesis, spectroscopic and thermal properties of the novel five-membered [N,O] metallocyclic complexes of palladium(II) with monoethyl (HL1) and monobutyl (HL2) esters of (α-anilino-N-benzyl)phosphonic acid are reported. Binuclear complexes Pd₂L₄ (L = L1, L2) were obtained by reaction of sodium salts of monoalkyl phosphonates with PdCl₄2- in aqueous solution. Four organophosphorus ligands bridge two palladium atoms by coordination through the aniline nitrogen and the deprotonated phosphonic acid oxygen. The complexes were identified and characterized by elemental analysis, magnetic and conductance measurements, as well as by spectroscopic (ESI-MS, IR, UV-VIS, 1H and 31P NMR) and thermal (TG, DTA) studies. The properties of the complexes are discussed with respect to those of palladium(II) metallocyclic complexes reported for monoalkyl 4-azobenzene-substituted anilinobenzylphos-phonates.

Keywords

palladium(II) complex; metallocycle; sodium anilino-benzylphosphonate; aminophosphonate complex; spectroscopy; thermal decomposition

Hrčak ID:

131958

URI

https://hrcak.srce.hr/131958

Publication date:

1.11.2001.

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