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 (proton, silver-109, and nitrogen-15 NMR)