192123-75-4Relevant academic research and scientific papers
Synthesis of methyltrioxorhenium(VII) arylamine complexes and mono-and bis(ortho)-chelated arylaminorhenium(VII) trioxides
Rietveld, Marco H.P.,Nagelholt, Lammert,Grove, David M.,Veldman, Nora,Spek, Anthony L.,Rauch, Monika U.,Herrmann, Wolfgang A.,Van Koten, Gerard
, p. 159 - 167 (1997)
From the reaction of MeReO3 with the neutral arylamine C6H5CH2NMe2 and the aryldiamine C6H4(CH2NMe2)2-1,3, have been isolated in good yields the 1/1 adduct complex [MeReO3 · C6H5CH2NMe2], 1, and the 2/1 adduct complex [(MeReO3)2 · C6H4(CH2NMe2)2-1,3], 2, respectively. The X-ray molecular structure of 2 shows that both rhenium centres have a trigonal bipyramidal geometry and in the axial positions of each rhenium centre are one of the NMe2 units of the aryldiamine ligand and a methyl group. The mono(ortho)-chelated arylaminorhenium trioxide complex [ReO3{C6H4CH2NMe2-2}], 3, can be synthesized by a transmetallation reaction of ClReO3 with [Zn{C6H4CH2NMe2-2}2] in a 2:1 molar ratio. In a similar way the bis(ortho)-chelated arylaminorhenium trioxide complex [ReO3{C6H3(CH2NMe2)2-2,6}], 4, can be synthesized by addition of a mixture of [Li2{C6H3(CH2NMe2)2-2,6}2] and ZnCl2 to ClReO3. Complexes 3 and 4 have been isolated as white solids in 66% and 81% yields respectively. The rhenium centre in complex 4 has a bicapped tetrahedral geometry in which the monoanionic {C6H3(CH2NMe2)2-2,6}- ligand is pseudo-facially bonded with a characteristic N1-Re-N2 angle of 107.7(3)°, a Re-Cipso bond length of 2.112(11) A and Re-N1 and Re-N2 bond lengths of 2.518(9) A and 2.480(8) A respectively.
