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Pyrazolato Metal Complexes: Synthesis, Characterization and X-ray Crystal Structures of Polynuclear Organometallic Re–Mn Derivatives

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

Publisher
John Wiley and Sons
Year
2000
Tongue
English
Weight
359 KB
Volume
2000
Category
Article
ISSN
1434-1948

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✦ Synopsis

By reacting [Re(CO) 3 (Hpz) 2 (pz)] (Hpz = pyrazole) with characterized in the solid state by single crystal X-ray diffraction analysis and were showed to contain Re•••Mn [Mn(CO) 5 Br] in toluene in the presence of Et 3 N, the dinuclear complex [(CO) 3 Re(pz) 3 Mn(CO) 3 ](Et 3 NH) (1) was interactions linked by and tris-µ 2 -pyrazolato bridges. In 5, a short [2.397(4) A ˚] tris(µ 2 -oxo)bridged Mn IV -Mn IV contact is obtained. The reaction of 1 with molecular oxygen affords the tetranuclear compound [(CO) 3 Re(pz) 3 Mn(O) 3 Mn(pz) 3 -found, leading to strong antiferromagnetic coupling of the d 3 ions. The homometallic species [(CO) 3 Mn(pz) 3 Mn(CO) 3 ]-Re(CO) 3 ](Et 3 NH) 2 (3) or the trinuclear compound [(CO) 3 -Re(pz) 3 Mn(pz) 3 Re(CO) 3 ](Et 3 NH) 2 (5) depending on the (Et 3 NH) (2) was also prepared and found to be isostructural with 1. experimental conditions. Complexes 1, 3 and 5 were

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