PdII and PtII Metal-Directed Self-Assembly of Supramolecular Structures Based on N-Monoalkyl-4,4¢-Bipyridinium Derivatives - Molecular Self-Assembly: Advances and Applications - page 371

The analogous platinum [3]catenane ( BPP34C10 ) -( M5b )

2

could be isolated in 70% yield by reaction of L5 ·2PF , BPP34C10 ,

6

1

and platinum complex (en)Pt(OTf ) H

NMR spectrum showed very similar chemical shifts to those of the
analogous palladium catenane. The electrospray ionization mass
spectrometry supported the structure, showing signals resulting
from the loss of between three and five hexafluorophosphate
anions.
In Fig. 11.11 the crystal structure of catenane
(

in CH CN at 50

°

C. The

2 3

is presented. The X-ray study revealed a
[3]catenane structure with the metallocycle

DB24C8 )

⊂ M5a

·5NO

2 3

M5a encircled by two

C-shaped molecules around the methylene groups (red

macrocycles in Fig. 11.11). Two of the catechol rings are inserted

DB24C8

Figure 11.11 Space-filling representation of the crystal structure of the

[3]catenane ( . Solvent molecules and

counter ions have been omitted for clarity. Color labeling
scheme: metallocycle, blue; inner cyclophanes, red; outer
cyclophanes, green.

DB24C8 )

⊂ M5a

·5NO

2 3