SYNTHESIS AND REACTIVITY OF TECHNETIUM(VII) IMIDO COMPLEXES

被引:48
作者
BRYAN, JC
BURRELL, AK
MILLER, MM
SMITH, WH
BURNS, CJ
SATTELBERGER, AP
机构
[1] Los Alamos National Laboratory, Los Alamos
关键词
D O I
10.1016/S0277-5387(00)84611-2
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The synthesis, characterization and electrochemistry of a series of new technetium complexes, Tc(NAr)3X and Tc(NAr')3X (X = OSiMe3, alkyl, I), is reported. These complexes are shown to be resistant to reduction and moderately air-sensitive. The siloxy complex Tc(NAr)3(OSiMe3) (1a) reacts with fluoride ion to give the tris(imido)oxo anion [TcO(NAr)3]-. Less sterically hindered M(NAr')3(OSiMe3) complexes react with Ar'NCO in a net [2+2] fashion to give the urylene complexes M(NAr')2(NArC(O)NAr') (OSiMe3) (2a, M = Tc; 2b, M = Re). The X-ray crystal structures of 1a, 2b and Tc(NAr)3I (4a) suggest that the imido ligands moderate their level of electron donation to reflect the electronic requirements of the metal and the ancillary ligands.
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页码:1769 / 1777
页数:9
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