Technetium, tris structure

Several research groups have studied the chemistry of tris(pyrazolyl)borate tricarbonyl complexes of technetium and rhenium. As depicted in Scheme 28, these studies allowed the synthesis of/ac-[M(CO)3Tp ] [M is Tc, Re, Tp is Tp (111/113), Tp (112/114)] complexes, which were all structurally characterized. Complexes 111-114 were synthesized by reaction of the classical starting materials [M(CO)5Br] with the sodium or potassium salts of the correspondent Tp ligands [121-123]. 

Treher EN, Francesconi LG, Gougoutas JZ, Malley M, Nunn A (1989) Mono-capped tris dioxime complexes of technetium (III) synthesis and structural characterization of TCX (dioxime)3, B-R (X=C1, Br dioximedimethylglyoxime cyclohexanedioxime R=CFl3, C4FI9). Inorg Chem 28 3411-3416... 

Technetium oxide tetrafluoride like the pentafluoride is formed as a by-product of TcFf, in the lluorination of technetium metal [59,78,79]. TCOF4 forms two phases that may be separated from TcFs and from one another by vacuum sublimation. One phase of TcOF forms blue needles, has a chain structure, and is isostructural with its rhenium analogue. The other modification is a more volatile green compound of tri-meric structure [78,79]. 

A. K. Burrell, D. L. Clark, P. L. Gordon, A. P. Sattelberger, and J. C. Bryan, /. Am. Chem. Soc., 116, 3813 (1994). Syntheses and Molecular and Electronic Structure of Tris(ar-ylimido)technetium(Vl) and -(V) Complexes Derived from Successive One-Electron Reduc-... 

The structure of a rhenium(V) complex with l,3,5-trideoxy-l,3,5-tris (2-hydroxybenzylamino)-c /i -inositol has been described, and the metal ion sequestering abilities of borate esters of 2-amino-2-deoxy-D-gluconate and 2-amino-2-deoxy-D-galactonate have been studied. The largest effects were measured upon adding Cd(ll) or Ni(II) to the borate - 2-amino-2-deoxy-D-gluconate system. A ribonucleoside technetium chelate prepared from 2, 3 -diamino-2, 3 -dideoxyadenosine is mentioned in Chapter 20. 

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