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Phosphino‐Aminothiazoline Platinum(II) and Platinum(II)/Gold(I) Complexes: Structural, Chemical and Vapoluminescent Properties
Author(s) -
Pattacini Roberto,
Giansante Carlo,
Ceroni Paola,
Maestri Mauro,
Braunstein Pierre
Publication year - 2007
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200701081
Subject(s) - tautomer , platinum , chemistry , moiety , crystallography , alcohol , nitrogen atom , stereochemistry , medicinal chemistry , organic chemistry , catalysis , ring (chemistry)
Phosphino‐amino‐thiazolines and ‐thiazoles can exist in solution in two tautomeric forms, in which the NH proton involves the endo‐cyclic or exo‐cyclic nitrogen atom. The two tautomers show different reactivities toward alcoholysis; the imino form degrades more rapidly. Their bischelated platinum complexes were studied in the solid state by single crystal X‐ray diffraction. Thus, the unique stereoelectronic features of the [Pt(PN th )] (PN th =diphenylposphino‐aminothiazoline) moiety were revealed. The complex cis ‐[Pt(PN th ) 2 ] reacts with gold(I) salts to yield dimetallic compounds, the molecular structures of which have been determined by X‐ray diffraction. Solid cis ‐[Pt(PN th ) 2 ] shows vapoluminescent properties if exposed to alcohol vapors. A combined photophysical and crystallographic investigation has been carried out to clarify the unprecedented rigidochromic role of the alcohol in this phenomenon.