[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.
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