83993-59-3Relevant academic research and scientific papers
Syntheses and characterization of thallium(I) complexes with 3-nitrophenoxide [Tl(3-np)], 4-nitrobenzoate [Tl(4-nb)] and 2,4-dinitrophenoxide [Tl(2,4-dnp)]: X-ray crystal structures of [Tl(3-np)]n and Tl(2,4-dnp) (two new polymeric compounds)
Mahjoub, Ali R.,Morsali, Ali,Bagherzadeh, Hossian
, p. 2555 - 2560 (2002)
Complexes thallium(I)3-nitrophenoxide [Tl(3-np)], thallium(I)2,4-dinitrophenoxide [Tl(2,4-dnp)] and thallium(I)4-nitrobenzoate [Tl(4-nb)] have been synthesized using a direct reaction between TlNO3 and the appropriate ligand. The complexes have been isolated and characterized by IR spectra and CHN elemental analyses. The structures of [Tl(3-np)]n and [Tl(2,4-dnp)] have been confirmed by X-ray crystallography. The single crystal X-ray crystallography of [Tl(3-np)]n shows the complex to be a one-dimensional polymer as a result of bridging 3-nitrophenoxide ligands. The Tl atoms have an unsymmetrical three-coordinate, O3 geometry (three oxygen atoms of the 3-nitrophenoxide ligand). The crystal structure of [Tl(2,4-dnp)] shows the complex to be a three-dimensional polymer as a result of bridging 2,4-dinitrophenoxide ligands. The Tl atoms have an unsymmetrical two-coordinate, 02 geometry (two oxygen atoms of the 2,4-dinitrophenoxide ligand). The arrangement of the 3-nitrophenoxide and 2,4-dinitrophenoxide ligands suggests a gap in coordination geometry around the Tl(I) ions, occupied possibly by a stereoactive lone pair of electrons on Tl(I). There is a π-π stacking interaction between the parallel aromatic rings belonging to adjacent chains in the compounds that may help to increase the 'gap' in coordination geometry around the Tl(I) ions.
Preparation and properties of some carbonyl-bridged dinuclear copper complexes
Doyle,Eriksen,Modrick,Ansell
, p. 1613 - 1618 (2008/10/08)
Several complexes of the type (diamine)2Cu2(CO)(02CR)+X -, which contain both a carbonyl and a carboxylate group bridging two coppers, have been prepared. The preferred method of synthesis involves the reaction of T1(02CR) and (diamine)CuI under a CO atmosphere. All the complexes are characterized by a CO absorption in the infrared at approximately 1900-1950 cm-1. A related compound, (tmed)2Cu2(CO)C4O4, which contains a bridging squarate group, was also prepared and the structure of its CH2C12 solvate characterized by single-crystal X-ray diffraction. The geometry of the squarate complex is quite similar to that of the benzoate derivative in spite of the charge difference and the much larger "bite" of the squarate ligand compared to the benzoate group.
