Second Sphere Coordination of Cationic Platinum Complexes by Crown Ethers— The X‐Ray Crystal Structure of [Pt(bpy)(NH₃)₂. Dibenzo[30]crown‐10]²⁺[PF₆]xH₂O (x≈0.6)

Hydrogen bonding and charge-transfer interactions stabilize the crystalline 1:1 adduct of [Pt(bpy)(NH3)2]2+[PF6]− and dlbenzo-30-crown-10. An X-ray structure analysis showed that the crown ether envelopes the dication; this coordination in the second sphere, which-as UV and 1H-NMR data show—also exists in solution, is to a great extent made possible by interactions between the two benzene rings of the host molecule and a pyridine ring of the guest complex.