The trinuclear copper(i1) complexes [Cu,(OH) (pz),( Hpz),CI,]~solv (Hpz = pyrazole, pz = pyrazolate anion, solv = H, O or tetrahydrofuran) have been obtained by oxidation reactions of [{Cu( Hpz),CI},]. When treated with pyridine(py), both Cu" derivatives gave the related compound [Cu,(OH) ( P Z ) ~-(py),CI,]*py, which has been characterized by a single-crystal X-ray structure analysis. Crystals are orthorhombic, space group Pnma (no. 62), a = 19.883(3), b = 15.063(3), c =9.495(2) A, Z = 4, R = 0.035 and R' = 0.041 for 1 472 absorption corrected reflections having I > 30(/). * p-Chloro-1 : ~~' ~/ -c h ~o r o -~~C / -p , -h y d r o x o -~~~-t r i -~-p y r a z o ~a t o -1 : ~KN'N';
The complex [Re{HB(pz),}(CO),][HB(pz), = hydrotris(1 -pyrazolyl)borate] has been prepared. Ultraviolet irradiation of its tetrahydrofuran (thf) solution gave [Re{H B(pz),}( CO),(thf)], which allowed the synthesis of a series of substitution derivatives [Re{HB(pz),}(CO),L],
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