Chemistry in Environmentally Benign Media. 7.1 Chelating Hydroxymethyl-Functionalized Bisphosphines as Building Blocks to Water-Soluble and in-Vitro-Stable Gold(I) Complexes. Synthesis, Characterization, and X-ray Crystal Structures of [Au{(HOH2C)2PC6H4P(CH2OH)2}2]Cl and [Au2{(HOH2C)2PCH2CH2P(CH2OH)