Group 11 Metal ions in poly(donor atom) environments: X-ray crystal and molecular structure of[M((R,S)-1,2-(5-R-thio-2-CH=N)2-c-Hx)2](O3SCF3) (M = Ag(I) R = Me, thio = thiophene, c-Hx = cyclohexane) and silver(I) and copper(I) coordination properties in solution (1H, 109Ag and 15N NMR)