Quadridentate nitrogen donor ligands acting as bridging di-bidentates; X-ray crystal and molecular structure of [Ag2{µ-(R)(S)-1,2-[(2-C5H4N)-C(H)N]2-cyclohexane}2][O3SCF3]2 and the observation of 3J(107,109Ag-1H) in the 1H n.m.r. spectrum of the dinuclear [Ag2L2]2+ cation

Abstract

The quadridentate N-donor ligands (R)(S)-1,2-[(6-R-2-C₅H₃N)C(H)N]₂–cyclohexane (R = H, Me), upon reaction with [M(O₃SCF₃)](M = Ag^I or Cu^I), behave as bridging di-bidentate ligands to form dimeric complexes such as the title complex for which an X-ray crystal structure was obtained; ³J(^107,109Ag-¹H) is observed in the ¹H n.m.r. spectra of the dinuclear [Ag₂L₂]²⁺ cations.