Combinatorial Libraries of Metal-Ligand Assemblies with an Encapsulated Guest Molecule Coordination Number Incommensurate Cluster Formation, Part 17. Financial support of this work was provided by NSF CHE-9709621 and a NATO-NSF exchange grant SRG 951516. We thank the Miller Foundation for a fellowship to M.Z. Part 16: R. M. Yeh, M. Ziegler, D. W. Johnson, A. J. Terpin, K. N. Raymond, Inorg. Chem. 2001, in press.