Reactions of [RuCl2(NO)(terpy)]+ (terpy = 2,2′ : 6′,2″-terpyridine) with mono anions such as NO2−, Br− and N3−, and structural studies on terpyridineruthenium having a nitrosyl ligand

Abstract

[RuCl₂(NO)(terpy)]PF₆ ([1]PF₆) has been synthesized by the reaction of K₂[RuCl₅(NO)] with terpy and characterized by single-crystal X-ray crystallography. [1]PF₆ has a structure in which the two chloro ligands are located trans to each other with the nitrosyl ligand on the plane of the terpy ligand. Reactions of [1]PF₆ with mono anions such as NO₂⁻, Br⁻ and N₃⁻ have been investigated. Its reactions with NO₂⁻ in H₂O and CH₃OH afford nitrosylterpyridineruthenium complexes, [Ru(OH)(NO₂)(NO)(terpy)]PF₆ ([2]PF₆) and [RuCl(OCH₃)(NO)(terpy)]PF₆ ([3]PF₆), respectively, whose geometrical configurations differ from that of [1]⁺. The Br⁻-substituted complex of [1]⁺, [RuBr₂-(NO)(terpy)]PF₆ ([4]PF₆), and two solvated complexes, [RuCl₂(CH₃CN)(terpy)] ([5]) and [RuCl(CH₃CN)₂(terpy)]PF₆ ([6]PF₆), have been formed in its reactions with Br⁻ and N₃⁻. Structures of [2]PF₆, [3]PF₆ and [4]PF₆ have been determined by singal-crystal X-ray crystallography and compared with each other.