Reductive Nitrosylation of ReO⁻₄ and Synthesis of an Azido Nitrosyl Complex of Rhenium and its 1,10-Phenanthroline and 2,2 ' -Bipyridine Derivatives Directly from ReO⁻₄

Abstract

Reductive nitrosylation of ReO^- ₄ by any of the known nitrosylating agents¹ and subsequent synthesis of rhenium nitrosyl derivatives have not yet been reported. The known nitrosyl compounds of this metal are very few and were prepared from low valent rhenium compounds (cyano, chloro or carbonyl complexes) by the treatment with HNO₃ ^2.3 or NO^4,5 or NOX⁶. We have recently reported⁷ the reduction and subsequent nitrosylation of ReOi using NH₂OHHCI and NCS^- in alkaline medium. Herein is described the direct reductive nitrosylation of ReO^- ₄ using NH₂OHHCl and N^- ₃ as evidenced by synthesing the complex ion [Re(NO)(N₃)₃H₂O]^- and its 1,10-phenanthroline and 2,2′-bipyridine derivatives from an aqueous-aerobic medium. It may be mentioned that azido nitrosyl complexes of any metal are extremely rare (only one is known).⁶