The Stereochemistry of Bis(α,α′-diimine)-copper(I) Complexes: The Crystal and Molecular Structures of Bis(2, 9-dimethyl-1, 10-phenanthroline)-copper(I) Bromide Hydrate, Bis(4, 4′, 6, 6′-tetramethyl-2, 2′-bipyridine)copper(I) Chloride Dihydrate, and Bis(2, 9-dimethyl-1, 10-phenanthroline)copper(I) Ni