Structure and Dynamics of the Host-Guest Complex of a Molecular Tweezer: Coupling Synthesis, Solid-State NMR, and Quantum-Chemical Calculations S.P.B. thanks the Alexander von Humboldt Foundation for a research fellowship. C.O. acknowledges financial support by a Liebig "Habilitation" fellowship from the Fonds der Chemischen Industrie (FCI). This work was supported by the Deutsche Forschungsgemeinschaft (SFB 452) and the FCI. We thank Dr. Ingo Schnell for his involvement in the early part of this project, Dr. Kay Saalwächter for advice concerning the heteronuclear experiment, and Dr. Ulrich Burkert for his help during the synthesis of the complex.