Synthesis and Stereoselective Self-Assembly of Double- and Triple-Stranded Helicates We thank Prof. Dr. P. Köll for providing us with excellent working conditions, and Prof. Dr. J. O. Metzger for the opportunity to perform the ESI–MS experiments. Financial support from the DFG and the Fonds der Chemischen Industrie is gratefully acknowledged. M.H. thanks the state of Lower Saxony for a graduate scholarship.