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Pyrazolato Metal Complexes – Synthesis, Characterization, and X-ray Crystal Structures of Heterotrimetallic Re–M2 Derivatives (M = Cu, Ag, Au)

✍ Scribed by G. Attilio Ardizzoia; Girolamo La Monica; Angelo Maspero; Norberto Masciocchi; Massimo Moret

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
334 KB
Volume
1999
Category
Article
ISSN
1434-1948

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✦ Synopsis

By treating [(CO) 3 Re(Hpz) 2 (pz)] (Hpz = pyrazole) with complexes 1a-c with cyclohexyl isocyanide (c-C 6 H 11 NC) afforded the derivatives {(CO) 3 Re(pz) 3 [M(c-C 6 H 11 NC)] 2 } (2a-[Cu(CH 3 CN) 4 ]BF 4 , AgNO 3 , or [Au(tht)Cl] (tht = tetrahydrothiophene) in acetonitrile in the presence of Et 3 N, the c). Complexes 2a-c have been characterized in solution by 1 H-NMR spectroscopy and in the solid state by single-crystal corresponding trinuclear complexes {(CO) 3 Re(pz) 3 [M-(CH 3 CN)] 2 } (1a-c) have been obtained. Treatment of X-ray diffraction analysis.

Re(pz) 3 ] 2Ϫ , which is capable of coordinating two different [a] Dipartimento di Chimica Inorganica, Metallorganica e Analital (see Table 1). Moreover, no absorption attributable to

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The mononuclear complexes [Re(CO) 3 (Hpz) 2 Br] (1) and [Re(CO) 3 (py)(Hpz)(pz)] species (6). The analogues of 4 and 6 with Hdmpz, i.e. [Re(CO) 3 (Hdmpz) 2 (dmpz)] ( ) and [Re(CO) 3 (Hdmpz) 2 Br] (2) were obtained by treating [Re(CO) 5 Br] with pyrazole (Hpz) or 3,5-dimethylpyrazole [Re(CO) 3 (py)(H