Synthesis and spectroscopic investigation of the pyrazole complexes. The X-ray structure of [ReOBr 3 (OAsPh 3 )(pzH)]

Mono and dinuclear Re IV and Re V complexes with 3,5 dimethylpyrazole (Me 2 pzH) were synthesized. The cis [Re 2 O 3 Cl 4 (3,5 Me 2 pzH) 4 ] complex (cis 1) was prepared by the reaction of NH 4 ReO 4 with K[HB(Me 2 pz) 3 ] in concentrated HCl or by refluxing of [ReCl 3 (MeCN)(PPh 3 ) 2 ] with Me 2 pzH in air. The bromide complex trans [Re 2 O 3 Br 4 (3,5 Me 2 pzH) 4 ] (trans 2) was synthesized by passing dry HBr through a solution of [Re 2 O 3 Br 2 (µ 3,5 Me 2 pz) 2 (3,5 Me 2 pzH) 2 ] (4) in chloroform. The pyrazolate bridged complex [Re 2 O 3 Cl 2 (µ 3,5 Me 2 pz) 2 (3,5 Me 2 pzH) 2 ] (3) was prepared from (Et 4 N) 2 [ReOCl 5 ] or Cs 2 [ReOCl 5 ] and Me 2 pzH. The corresponding bromide and iodide complexes [Re 2 O 3 X 2 (3,5 Me 2 pz) 2 (3,5 Me 2 pzH) 2 ]•C 6 H 6 (X = Br (4) or I (5)) were synthesized by the reactions of (NH 4 ) 2 [ReBr 6 ] or K 2 [ReI 6 ], respectively, with Me 2 pzH. The [ReO(OMe)(3,5 Me 2 pzH) 4 ]Br 2 • •3,5 Me 2 pzH•4H 2 O complex (6) was obtained as a by product in the synthesis of complex 4. The reaction of [ReNCl 2 (PPh 3 ) 2 ] with Me 2 pzH was accompanied by hydrolytic denitration giving rise to the mixed ligand complex [Re 2 O 3 Cl 2 (µ 3,5 Me 2 pz) 2 (3,5 Me 2 pzH)(PPh 3 )] (7). The reaction of (NH 4 ) 2 [ReBr 6 ] with a Me 2 pzH melt gave the trans [ReBr 4 (3,5 Me 2 pzH) 2 ]• •Me 2 CO complex (8). The structures of complexes 2 and 4-8 were established by X ray diffraction. All compounds were characterized by elemental analysis, electronic absorption spectroscopy, 1 H NMR and IR spectroscopy, mass spectrometry, and cyclic voltammetry.

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Rhenium(IV) and rhenium(V) complexes with 3,5-dimethylpyrazole

Sokolov

Федорова

Первухина

et al. 2006

Russ Chem Bull

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Octahedral rhenium cluster complexes with organic ligands: Synthesis, structure and properties of [Re6Q8(3,5-Me2PzH)6]Br2·2(3,5-Me2PzH) (Q=S, Se)

Mironov

Brylev

Shestopalov

et al. 2006

Inorganica Chimica Acta

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Synthesis, crystal, molecular and electronic structure of rhenium nitrosyl with pyrazole in the coordination sphere

Machura

Kruszyński

Jaworska

2005

Inorganic Chemistry Communications

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Synthesis and spectroscopic investigation of the pyrazole complexes. The X-ray structure of [ReOBr 3 (OAsPh 3 )(pzH)]

Cited by 6 publications

References 32 publications

Rhenium(IV) and rhenium(V) complexes with 3,5-dimethylpyrazole

Rhenium(IV) and rhenium(V) complexes with 3,5-dimethylpyrazole

Octahedral rhenium cluster complexes with organic ligands: Synthesis, structure and properties of [Re6Q8(3,5-Me2PzH)6]Br2·2(3,5-Me2PzH) (Q=S, Se)

Synthesis, crystal, molecular and electronic structure of rhenium nitrosyl with pyrazole in the coordination sphere

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